Diamond

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Diamond
A clear octahedral stane protrudes frae a black rock.
The slichtly misshapen octahedral shape o this rough diamond crystal in matrix is typical o the mineral. Its lustrous faces an aa indicate that this crystal is frae a primary deposit.
General
Category Native Minerals
Formula
(repeating unit)
C
Strunz classification 01.CB.10a
Identification
Formula mass 12.01 g/mol
Color Typically yellae, broun or gray tae colourless. Less eften blue, green, black, translucent white, pink, violet, orange, purpie an reid.
Crystal habit Octahedral
Crystal seestem Isometric-Hexoctahedral (Cubic)
Cleavage 111 (perfect in fower directions)
Fractur Conchoidal (shell-lik)
Mohs scale hairdness 10
Luster Adamantine
Streak Colorless
Diaphaneity Transparent tae subtransparent tae translucent
Specific gravity 3.52±0.01
Density 3.5–3.53 g/cm3
Polish luster Adamantine
Optical properties Isotropic
Refractive index 2.418 (at 500 nm)
Birefringence None
Pleochroism None
Dispersion 0.044
Meltin pynt Pressur dependent
References [1][2]

In mineralogy, diamond (frae the auncient Greek αδάμας – adámas "unbreakable") is a metastable allotrope o carbon, whaur the carbon atoms are arranged in a variation o the face-centered cubic crystal structur cried a diamond lattice. Diamond is less stable than graphite, but the conversion rate frae diamond tae graphite is negligible at staundart condeetions. Diamond is renowned as a material wi superlative pheesical qualities, maist o which originate frae the strang covalent bonding atween its atoms. In particular, diamond haes the heichest hardness an thermal conductivity o any bulk material. Those properties determine the major industrial application o diamond in cuttin an polishin tuils an the scienteefic applications in diamond knives an diamond anvil cells.

References[eedit | eedit soorce]

  1. "Diamond". Mindat. Retrieved 2009-07-07. 
  2. "Diamond". WebMineral. Retrieved 2009-07-07.