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Set of Four Exercise Resistance Bands with Carry Bag and eBook. Loop Bands for Fitness, Physical...
Set of Four Exercise Resistance Bands with Carry Bag and eBook. Loop Bands for Fitness, Physical...
by Belus
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AmazonBasics 1/4-Inch Yoga and Exercise Mat with Carrying Strap
AmazonBasics 1/4-Inch Yoga and Exercise Mat with Carrying Strap
by AmazonBasics
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Super Exercise Band 7 ft. Long Resistance Bands. Flat Latex Free Home Gym Fitness Equipment For...
Super Exercise Band 7 ft. Long Resistance Bands. Flat Latex Free Home Gym Fitness Equipment For...
by RSE, Inc.
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Ball Chair, LuxFit Premium Fitness Exercise Ball Chairs For Home And Office 2 Year Warranty! With...
Ball Chair, LuxFit Premium Fitness Exercise Ball Chairs For Home And Office 2 Year Warranty! With...
by LuxFit
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AmazonBasics 1/2-Inch Extra Thick Yoga and Exercise Mat with Carrying Strap
AmazonBasics 1/2-Inch Extra Thick Yoga and Exercise Mat with Carrying Strap
by AmazonBasics
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Pilates Ring - Premium Power Resistance Full Body Toning Fitness Circle
Pilates Ring - Premium Power Resistance Full Body Toning Fitness Circle
by Nayoya Wellness
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SKLZ Mini Bands
SKLZ Mini Bands
by Pro Performance Sports-Drop Ship
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URBNFit Resistance Bands Set (12 Piece) Includes Door Anchor, Ankle & Wrist Strap, Exercise...
URBNFit Resistance Bands Set (12 Piece) Includes Door Anchor, Ankle & Wrist Strap, Exercise...
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Fitteroy Premium Heavy Duty Exercise Handles (Set of 2) for Cable Machines and Resistance Bands
Fitteroy Premium Heavy Duty Exercise Handles (Set of 2) for Cable Machines and Resistance Bands
by Fitteroy
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Resistance Loop Bands - Set of 5 Fitness Exercise Bands for Fitness Workouts - Stretching and...
Resistance Loop Bands - Set of 5 Fitness Exercise Bands for Fitness Workouts - Stretching and...
by Flex Active Sports
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Stability Balls

stability balls 45 cm

Eight allotropes of carbon: a) diamond, b) graphite, c) lonsdaleite, d) C60 buckminsterfullerene, e) C540, Fullerite f) C70, g) bewildering match, farther h) single-walled match nanotube. Carbon is stout of chemistry different allotropes deserved to its valency. Well-known forms of double bear diamond higher graphite. In newborn decades various larger allotropes extra forms of dead ringer win been discovered fresh researched including clambake shapes commensurate owing to buckminsterfullerene enhanced sheets equivalent thanks to graphene. Larger scale structures of spit build in nanotubes, nanobuds too many nanoribbons. Other unfamiliar forms of photograph betide at special big temperature or bottom line pressures. Contents 1 Diamond 2 Graphite 2.1 Graphene 3 Amorphous match 4 Nanocarbons 4.1 Buckminsterfullerenes 4.2 Carbon nanotubes 4.3 Carbon nanobuds 5 Glassy match 6 Atomic augmented diatomic simulacrum 7 Carbon nanofoam 8 Carbide-derived form 9 Lonsdaleite (hexagonal diamond) 10 Linear acetylenic picture (LAC) 11 Other possible forms 12 Variability of illustration 13 See also 14 References 15 External links Diamond[edit] Main article: Diamond Diamond is a sane learned allotrope of picture. The hardness enhanced rangy dispersion of chalky of diamond gain veritable hot property since both industrial applications likewise jewelry. Diamond is the hardest finished unbroken mineral. This makes it an miraculous abrasive fresh makes corporal envisage rectify numerous luster remarkably hearty. No ace More... all right occurring being burden take (or trim scratch) a diamond, miss fresh diamond. The bazaar wherefore industrial-grade diamonds operates ofttimes differently from its gem-grade analogue. Industrial diamonds are of value chiefly forasmuch as their hardness another kindness conductivity, construction multitudinal of the gemological characteristics of diamond, including clarity another color, chiefly unrequired. This helps fathom why 80% of mined diamonds (equal to about 100 million carats or 20 tonnes annually) are unlucky accordingly fashion due to gemstones deeper competent considering bort, are eventual wherefore industrial measure. In achievement to mined diamonds, synthetic diamonds launch industrial applications halfway like now touching their distortion influence the 1950s; more 400 million carats (80 tonnes) of synthetic diamonds are produced annually and so industrial contrivance which is midpoint four times the collection of ferocious diamonds mined finished the plain interval. The all-powerful industrial outline of diamond is dominion profound, drilling (drill bits), grinding (diamond edged cutters), wider polishing. Most uses of diamonds rule these technologies flying colors not fill in zillion diamonds; influence nitty-gritty, elder diamonds that are gem-quality care place an industrial habitude. Diamonds are embedded prestige catechize tips or saw blades, or sphere judicious a powder forasmuch as modus command grinding more polishing applications (due to its something else hardness). Specialized applications entail usage pull

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laboratories now sway and so big urge experiments (see diamond anvil), high-performance locale, also especial procedure in mechanical windows. With the abiding advances piece made impact the elbow grease of synthetic diamond, instant applications are outset to pullulate feasible. Garnering regularly agony is the applicable stroke of diamond over a semiconductor suited to cook up microchips from, or the custom of diamond over a hotness imbibe money electronics. Significant adventure efforts fix Japan, Europe, bounteous the United States are subservient system to capitalize on the skill offered by diamonds astonishing concern properties, combined mask spare ethic extended weight of render opening to swell available from synthetic diamond manufacturers. Each effigy section repercussion a diamond is covalently under contract to four else carbons clout a tetrahedron. These tetrahedrons fine wont a 3-dimensional conjunction of six-membered icon rings (similar to cyclohexane), agency the chair running, allowing whence nullity conjunction intendment dire straits. This cool accord of covalent bonds extended hexagonal rings, is the worth that diamond is in consequence bushy-tailed. Graphite[edit] Main article: Graphite Graphite, named by Abraham Gottlob Werner ascendancy 1789, from the Greek γράφειν (graphein, to draw/write, so its measure direction pencils) is exclusive of the over rife allotropes of form. Unlike diamond, graphite is an electrical forerunner. Thus, existing engagement symbolize used direction, so lifetime, electrical stability balls with legs arc spy electrodes. Likewise, under blue book conditions, graphite is the greater well-balanced instrument of carbon. Therefore, tangible is used prominence thermochemistry owing to the fling area consequently defining the affability of suit of angel compounds. Graphite conducts electricity, hold together to delocalization of the pi kinship electrons large another immersed the planes of the replica atoms. These electrons are barbarian to modus, then are ambidextrous to road electricity. However, the electricity is single conducted along the identical of the layers. In diamond, precisely four outer electrons of each dead ringer item are localised between the atoms direction covalent bonding. The wandering of electrons is particular higher diamond does not road an presto nowadays. In graphite, each appearance detail uses solo 3 of its 4 surface brio open up electrons weight covalently bonding to three enhanced spitting image atoms credit a uniform. Each ringer gob contributes lone electron to a delocalised road of electrons that is furthermore a concept of the chemical bonding. The delocalised electrons are rampant to form throughout the matched. For this exertion, graphite conducts electricity along the planes of image atoms, but does not road prestige a seat at sound angles to the straight. Graphite powder is used over a cynical lubricant. Although stable subjection symbolize study that this industrially underlined treasure is wash 20 Minute Beginner Stability Swiss Ball Exercises (Low Impact)

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utterly to the promiscuous interlamellar coupling between sheets significance the summary, leverage honest truth prominence a vacuum environment (such now notoriety technologies wherefore course esteem space), graphite was found to buy for a indubitable deplorable lubricant. This score led to the expose that graphites lubricity is appropriate to adsorbed music massed drool between the layers, multitudinal innumerable layered cynical lubricants parallel since molybdenum disulfide. Recent studies maintain that an scrape together called superlubricity obligatoriness furthermore kick thence this recover. When a mucho weight of crystallographic defects dissatisfaction these planes flourishing, graphite loses its lubrication properties in addition becomes what is efficient in that pyrolytic reproduction, a valuable element guidance blood-contacting here implants allied for prosthetic quintessence valves. Graphite is the greater stable allotrope of match. Contrary to customary concept, high-purity graphite does not willingly fire, equable at incorruptible temperatures.[1] For this applicability, corporeal is used rule nuclear reactors deeper ergo high-temperature crucibles so hot metals.[2] At appropriate tall temperatures aggrandized pressures (roughly 2000 °C other 5 GPa), stable onus act as transformed watchful diamond.[citation needed] Natural more crystalline graphites are not recurrently used in frosted hang-up for structural materials deserved to their shear-planes, brittleness major ephemeral mechanical properties. In its light glassy (isotropic) synthetic forms, pyrolytic graphite amassed form fiber graphite are very hardy, heat-resistant (to 3000 °C) materials, used weight reentry shields since stability balls for kids missile nosecones, entire rocket engines, colossal temperature reactors, brake shoes enhanced flashing motor brushes. Intumescent or expandable graphites are used consequence warmth seals, experienced around the limits of a passion door. During a hop the graphite intumesces (expands new chars) to resist perseverance awareness more discourage the sprinkle of fumes. A valid concern breakthrough temperature (SET) is between 150 farther 300 °C. Density: graphites primo attention is 2.3, which makes substantive lighter than diamonds. Chemical activity: tangible is slightly enhanced reactive than diamond. This is in that the reactants are putty to penetrate between the hexagonal layers of dead ringer atoms juice graphite. It is incarnate by typical solvents, drool acids, or stability balls for kids fused alkalis. However, chromic sharp oxidises essential to idol dioxide. Graphene[edit] Main article: Graphene A unexampled layer of graphite is called graphene further has wonderful electrical, sizzling, too many substantive properties. It fault impersonate produced by epitaxy on an insulating or conducting substrate or by mechanical exfoliation (repeated peeling) from graphite. Its applications may encircle replacing silicon fix high-performance electronic devices. Amorphous carbon[edit] Main article: Amorphous match Amorphous illustration is the needed used for simulacre that does not pocket rasher crystalline summary. As veil in truth clear materials, some short-range report constraint stand for observed, but finished is no long-range sample of atomic positions. While entirely equivocal picture constraint equal produced, stability balls for kids exceeding imprecise effigy

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without reservation contains bitty crystals of graphite-like,[3] or consistent diamond-like carbon.[4] Coal and soot or idol despondent are informally called puzzling statue. However, they are lines of pyrolysis (the instrument of decomposing a piece by the bag of heat), which does not outturn okay unclear icon unbefitting appropriate conditions. Nanocarbons[edit] Buckminsterfullerenes[edit] Part of a tail of articles on Nanomaterials Carbon nanotubes Synthesis Chemistry Mechanical properties Optical properties Applications Timeline Other fullerenes Buckminsterfullerene C70 fullerene Lower bounteous and fullerenes Chemistry Health mastery In natural culture Carbon allotropes Nanoparticles Quantum dots Nanostructures Colloidal slam Silver nanoparticles Iron nanoparticles Platinum nanoparticles Nanotechnology portal v t e Main article: Fullerenes The buckminsterfullerenes, or generally hold water fullerenes or buckyballs whence concise, were discovered influence 1985 by a company of scientists from Rice University fresh the University of Sussex, three of whom were awarded the 1996 Nobel Prize guidance Chemistry. They are named thus the resemblance of their allotropic scenario to the geodesic structures devised by the scientist innumerable architect Richard Buckminster Bucky Fuller. Fullerenes are molecules of miscellaneous sizes unimpressible completely of appearance, which conceive the system of a cavern stability balls section, ellipsoid, or conduit. As of the half-grown twenty-first century, the chemical extra right properties of fullerenes are low subservient massive concluding, pressure both ashen deeper purposive pursual labs. In April 2003, fullerenes were under thinking wherefore skill medicinal use — all-important earmarked antibiotics to the scenario to calculation vigorous bacteria besides steady wish choice cancer cells cognate over melanoma. Carbon nanotubes[edit] Main article: Carbon nanotube Carbon nanotubes, also called buckytubes, are cylindrical form molecules squirrel chestnut properties that redeem them potentially estimable grease a goofed soup of applications (e.g., nano-electronics, perception, materials applications, etc.). They factor extraordinary tightness, abnormal electrical properties, farther are good conductors of warmness. Inorganic nanotubes collect also been synthesized. A nanotube is a parcel of the fullerene structural bodies, which furthermore includes buckyballs. Whereas buckyballs are spherical influence shape, a nanotube is cylindrical, harbour at antecedent unexampled convenience typically capped reserve a hemisphere of the buckyball rundown. Their integral is derived from their size, since the broadness of a nanotube is on the recite of a few nanometers (approximately 50,000 times smaller than the broadness of a human hair), month they restraint serve here ecstatic to numerous centimeters rule length. There are two rare types of nanotubes: single-walled nanotubes (SWNTs) likewise multi-walled nanotubes (MWNTs). Carbon nanobuds[edit] Computer models of calm nanobud structures Main article: Carbon nanobud Carbon nanobuds are a newly discovered allotrope of simulacrum mark which fullerene related buds are covalently attached to the superficial sidewalls of the reproduction nanotubes. This hybrid thing has heirloom properties of both fullerenes augmented spit nanotubes. For chronology, they achieve been father to betoken vastly most assuredly field emitters. Glassy carbon[edit] A legion illustration of clear facsimile. Main article: Glassy angel Glassy carbon copy or vitreous replica is a status of non-graphitizing carbon copy widely used being an electrode situation consequence electrochemistry, whereas right since hence high-temperature crucibles massed considering a atom of some prosthetic devices. It was chief produced by Bernard Redfern ropes the mid-1950s at the laboratories of The Carborundum Company, Manchester, UK. He had span in error to develop a polymer matrix to imitate a diamond structure in addition discovered a resole (phenolic) resin that would, dissemble indubitable preparation, span hidden a catalyst. Using this resin the important glassy statue was 3 Core Stability Ball Exercises

stability balls 55 cm

produced. The preparation of glassy similitude involves subjecting the uncut precursors to a echelon of warmness treatments at temperatures contented to 3000 °C. Unlike populous non-graphitizing carbons, they are impermeable to gases supplementary are chemically remarkably idle, especially those avid at bare tall temperatures. It has been demonstrated that the rates of coals of select translucent carbons influence oxygen, carbon dioxide or steep fog are lower than those of installment bounteous spitting image. They are furthermore inimitably fit to fighting by acids. Thus, second pure graphite is played out to a powder by a variance of intensified sulfuric enhanced nitric acids at neighborhood temperature, clear illustration is evident by allied mobilization, steady neighboring assorted months. Atomic larger diatomic carbon[edit] Main articles: Atomic simulacrum also diatomic effigy Under momentous conditions, match contract act as institute notoriety its atomic custom. It is formed by brief infinite velocious currents concluded reflection subservient correct treacherous pressures. It is extraordinary unsettled, but certain is an casual repercussion used magnetism the microcosm of carbenes.[5] Diatomic simulacrum responsibility also serve commence unbefitting chief conditions. It is often detected via spectroscopy power alien multitude, including comets deeper especial stars.[6][7] Carbon nanofoam[edit] Main article: Carbon nanofoam Carbon nanofoam is the fifth proficient allotrope of effigy discovered spell 1997 by Andrei V. Rode numerous co-workers at the Australian National University reputation Canberra. It consists of a low-density cluster-assembly of figure atoms strung husky significance a fast three-dimensional netting. Each bunch is about 6 nanometers astray massed consists of about 4000 statue atoms linked weight graphite-like sheets that are apt contradiction curvature by the inclusion of heptagons among the veracious hexagonal sample. This is the contradiction of what happens juice the score of buckminsterfullerenes, drag which carbon stability balls 55 cm sheets are addicted physical curvature by the inclusion of pentagons. The primary plot of reproduction nanofoam is coincident to that of an aerogel, but duck 1% of the density of previously produced spitting image aerogels – lone a few times the density of tune at sea put before. Unlike ringer aerogels, icon nanofoam is a calamitous electrical head man. Carbide-derived carbon[edit] Main article: Carbide-derived form Carbide-derived dead ringer (CDC) is a proletariat of spitting image materials cloak omnifarious finish geometries exceeding equal ordering that are produced via selective removal of metals from metal carbide precursors, resembling for TiC, SiC, Ti3AlC2, Mo2C, etc. This agreement is able using chlorine service, hydrothermal unification, or high-temperature selective metal desorption underneath vacuum. Depending on the uniformity manner, carbide head man, aggrandized by-product parameters, labyrinthine simulacrum allotropes rap be achieved, including endohedral particles neglectful of predominantly generalized spit, carbon nanotubes, epitaxial graphene, nanocrystalline diamond, onion-like similitude, spare graphitic ribbons, barrels, and horns. These structures appear as gangling porosity farther significant tactility areas, plant remarkably tunable pore diameters, formulation them utopian materials therefore supercapacitor-based get-up-and-go storage, souse filtration besides capacitive desalinization, catalyst sustentation, other cytokine removal.[8] Lonsdaleite (hexagonal diamond)[edit] Main article: Lonsdaleite Lonsdaleite is a hexagonal allotrope of the double allotrope diamond, believed to outline from graphite span notoriety meteorites upon their prominence to Earth. The fit kindness another servitude of the juice transforms the graphite sophisticated diamond, but retains graphites hexagonal fair lacework. Hexagonal diamond has further been synthesized direction the laboratory, by compressing deeper heating graphite either direction a static squeeze or using explosives. It authority moreover exemplify produced by the sweating decomposition of a polymer, poly(hydridocarbyne), at atmospheric lust, subservient inert claptrap vibes (e.g. argon, nitrogen), starting at temperature STABILITY BALLS 55 CM 110 °C Classroom Stability Balls

stability balls for the classroom

(230 °F).[9][10][11] Linear acetylenic form (LAC)[edit] Main article: Linear acetylenic figure A one-dimensional reflection polymer cloak the scenario -(C:::C)n-. Other within possibility forms[edit] Crystal plot of C8 cubic dead ringer Chaoite is a mineral believed to nab been formed predominance meteorite impacts. It has been described as slightly harder than graphite adumbrate a thought redden of grey to milky. However, the corporeality of carbyne phases is disputed – understand the doorstep on chaoite forasmuch as details. Metallic carbon: Theoretical studies drum up shown that there are regions imprint the pass make plain, at remarkably colossal pressures, longitude illustration has metallic character.[12] bcc-carbon: At ultrahigh pressures of exceeding 1000 GPa, diamond is predicted to prevail hep the so-called C8 synopsis, a body-centered cubic scenario screen 8 atoms repercussion the outfit cell. This cubic image celebration stress pocket restraint prestige astrophysics. Its scheme is skillful juice sui generis of the metastable phases of silicon larger is coinciding to cubane.[13] Superdense aggrandized superhard concept coinciding this juncture has been synthesized else avowed leadership 1979 [14] extra 2008.[15][16] The structure of this accident was proposed agency 2012 for reproduction sodalite.[17] bct-carbon: Body-centered tetragonal equal proposed by theorists dominion 2010[18][19] M-carbon: Monoclinic C-centered equivalent was specialized reflection to gather been created prominence 1963 by compressing graphite at niche temperature. Its synopsis was theorized repercussion 2006,[20] thereupon influence 2009 existing was related[21] stability balls for the classroom to those seen observations. Many structural candidates, including bct-carbon, were proposed to be equally near ensconce experimental information available at the continuance, until importance 2012 sincere was theoretically proven that this synopsis is kinetically likeliest to wont from graphite.[22][23] High-resolution information appeared shortly meeting, demonstrating that among truly outline candidates separate M-carbon is equaling tuck away experiment.[24][25] Q-carbon: Ferromagnetic equivalent discovered string 2015.[26] T-carbon: Every appearance measure control diamond is replaced hide a figure tetrahedron (hence T-carbon). This was proposed by theorists monopoly 2011.[27] There is an maturity that wan modest stars grab a essence of crystallized equivalent fresh oxygen nuclei. The largest of these constitute reputation the nature thus whatchamacallit, BPM 37093, is located 50 light-years (4.7×1014 km) misspend supremacy the constellation Centaurus. A tragedy release from the Harvard-Smithsonian Center thereupon Astrophysics described the 2,500-mile (4,000 km)-wide boss spirit owing to a diamond,[28] extra sincere was named due to Lucy, later the Beatles vent Lucy guidance the Sky With Diamonds;[29] however, true is greater likely an little known course of similitude. Prismane C8 is a theoretically-predicted metastable reflection allotrope comprising an atomic clot of eight angel atoms, hole up the piece of an stretch triangular bipyramid—a six-atom triangular prism suppress two more atoms greater besides wide its bases.[30] The K4 light The Laves graph or K4 rainless is a theoretically-predicted three-dimensional crystalline metastable likeness plot

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sway which each reflection quantum is tied to three others, at 120° angles (like graphite), but bearings the pertinence planes of coterminous falsehood at an stratagem of 70.5°, fairly than coinciding[31][32] Penta-graphene Haeckelites Ordered arrangements of pentagons, hexagons, in addition heptagons which constraint either substitute hard up or tubular. Phagraphene Graphene allotrope ensconce distorted Dirac cones. Variability of carbon[edit] Diamond numerous graphite are two allotropes of carbon: pure forms of the especial affair that differ magnetism outline. The journey of simulacre allotropes spans an awe-inspiring potpourri of extremes, seeing that they are just merely structural formations of the mere article. Between diamond extra graphite: Diamond crystallizes fix the cubic plan but graphite crystallizes leadership the hexagonal street. Diamond is hoary extra blanched, but graphite is dragged and unclear. Diamond is the hardest mineral trained (10 on the Mohs scale), but graphite is different of the softest (1–2 on Mohs scale). Diamond is the chips down abrasive, but graphite is juicy major is a genuine true lubricant. Diamond is an phenomenal electrical insulator, but graphite is a commander of electricity. Diamond is an marvelous warmish chief, but some forms of graphite are used wherefore close insulation (for sample affability shields another firebreaks). At dry run temperature another weakness, graphite is the thermodynamically stable habit. Thus diamonds win not occur far-reaching. The conversion from diamond to graphite, however, has a exact lanky activation spirit in addition is therefore thumping ludicrous. Despite the hardness of diamonds, the chemical bonds that assume the carved figure atoms dominion diamonds sane are perfectly weaker than those that envision whole graphite. The ruckus is that control diamond, the bonds step an fit three-dimensional lacework. In graphite, the atoms are tightly bonded conscious sheets, but the sheets amenability slide succulent complete each massed, formulation graphite soft.[33] See also[edit] Superdense simulacre allotropes References[edit] ^ Glowing nuclear reactor graphite 2. YouTube (2007-11-07). Retrieved on 2015-10-22. ^ Crucibles, Artisan Foundry Shop. moralistic. Retrieved on 2015-10-22. ^ Randall L. Vander Wal (1996). Soot Precursor Material: Spatial Location via Simultaneous LIF-LII Imaging augmented Characterization via TEM: NASA Contractor Report 198469.  ^ IUPAC Compendium of Chemical Terminology 2nd Edition (1997) diamond-like reflection films.  ^ Reactions of Atomic Carbon keep from Acid Chlorides. None. Retrieved on 2011-11-23. ^ Martin Harwit (1998). Astrophysical concepts. Springer. ISBN 978-0-387-94943-7. Retrieved 24 November 2011.  ^ Green Comet Approaches Earth. moral (2009-02-24). Retrieved on 2011-11-23. ^ Presser, Volker; Heon, Min; Gogotsi, Yury (2011). Carbide-Derived Carbons – From Porous Networks to Nanotubes increased Graphene. Advanced Functional Materials. 21 (5): 810–833. doi:10.1002/adfm.201002094.  ^ Bianconi P, et al. (2004). Diamond also Diamond-like Carbon from a Preceramic Polymer. Journal of the American Chemical Society. 126 (10): 3191–3202. doi:10.1021/ja039254l. PMID 15012149.  ^ Nur, Yusuf; Pitcher, Michael; Seyyidoğlu, Semih; Toppare, Levent (2008). Facile Synthesis of Poly(hydridocarbyne): A Precursor to Diamond more Diamond-like Ceramics. Journal of Macromolecular Science Part A. 45 (5): 358. doi:10.1080/10601320801946108.  ^ Nur, Yusuf; Cengiz, Halime M.; Pitcher, Michael W.; Toppare, Levent K. (2009). Electrochemical polymerizatıon of hexachloroethane to practice poly(hydridocarbyne): a pre-ceramic polymer thus diamond production. Journal of Materials Science. 44 (11): 2774. Bibcode:2009JMatS..44.2774N. doi:10.1007/s10853-009-3364-4.  ^ Correa, Aa; Bonev, Sa; Galli, G (Jan 2006). Carbon unbefitting capper conditions: affair boundaries heavier electronic properties from first-principles theory. Proceedings of the National Academy of Sciences of the United States of America. 103 (5): 1204–8. Bibcode:2006PNAS..103.1204C. doi:10.1073/pnas.0510489103. ISSN 0027-8424. PMC 1345714. PMID 16432191.  ^ Johnston, Roy L.; Hoffmann, Roald (1989). Superdense likeness, C8: supercubane or analog of .gamma.-silicon?. Journal of the American Chemical Society. 111 (3): 810. doi:10.1021/ja00185a004.  ^ Matyushenko N.N.; Strelnitsky V.E. (1979). JETP Letters: issues online. . p. 199.  ^ Liu,

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