Density of graphite

Chen, R., Trucano, P. and Stewart, R.F. (1977) The valence-charge density of graphite, Acta Cryst., A33, 823-828. 

An additional noteworthy trend is the tendency for the density of coal to exhibit a minimum value at approximately 85% w/w carbon. For example, a 50 to 55% w/w carbon coal will have a density of approximately 1.5 g/cm3, and this will decrease to, say, 1.3 g/cm3 for an 85% carbon coal followed by an increase in density to about 1.8 g/cm3 for a 97% carbon coal. On a comparative note, the density of graphite (2.25 g/cm3) also falls into this trend. 

In graphite the distance between planes is 0.335 nm and the distance between carbon atoms in the hexagonal planes is 0.142 nm. Calculate the density of graphite. 

This equilibrium can only exist under very special conditions. Density of diamond = 3.5 density of graphite = 2.3 g/cm3. 

From the data in Appendix B, graphite is seen to be the stable form of carbon at 298 K and atmospheric pressure. The densities of graphite and diamond are 2.25 g/cm3 and 3.52 g/cm3, respectively. Calculate the pressure to which graphite must be raised at 298 K in order for a diamond to become the stable form of carbon. Is this a viable method for converting graphite to diamond Explain your answer. 

Stability of the graphite-like phase which appears in the irradiated diamonds as a result of polyamorphic transition with high decrease of density was studied using neutron and x-ray methods. The graphite-like structure was shown to be stable up to 50 kbar from ambient temperature to 1500 K at normal pressure. Simultaneously at rapid heating to 900-1000 K new (apparently metastable) modifications of carbon are formed. The diffraction patterns of the modifications do not coincide with those of known structures of carbon (diamond, lonsdeylite, graphite, chaoite, carbine, fullerene and its derivatives etc). It was shown that density of these structures does not differ much from the density of graphite, and at least one of these phases corresponds to a superstructure based on the bee modification of C8 with modified density [14],... 

The easy transfer to surfaces is probably the reason for the early names "plumbago" and "molybdaena", meaning lead-like, since lead also produces dark marks on paper and fabric. Lead rods were used in ancient times for marking out parchments, and this has led to the expressions "lead pencil" and "black-lead" which have been common until the twentieth century. Both terms now commonly refer to graphite, which resembles molybdenum disulphide in many ways, but the latter was almost certainly used in the same way until the late eighteenth century. The two materials can be easily distinguished by the lower density of graphite. 

The adsorbent density ps =ps( is set equal to the density of graphite, for which y0is =5.2. 

The density of graphite varies strongly depending on the material s origin and dispersity. It is 2.26gcm for ideal graphite, but it may be as low as 1.5gcm in... 

The only condition imposed over Equation (29.7) is that closure conditions can be attained only with an even number of atoms [10]. The nearest even integer. No, matching the mean experimental value of interlayer spacing (0.3373 nm) and the atomic surface density of graphite planes... 

Density of 55MSI Graphite/6061 Aluminum Composites Density of Graphite Tiber Reinforced Metals Density of Si3N4 Composites... 

ASTM C-1039 Apparent porosity, apparent specific gravity, and bulk density of graphite electrodes... 

Weight of graphite Density of graphite Maximum temperature ... 

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