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 Meenerals
Formula
(repeatin unit)
C
Strunz clessification 01.CB.10a
Creestal seestem Isometric-Hexoctahedral (Cubic)
Identification
Formula mass 12.01 g/mol
Colour Typically yellae, broun or gray tae colourless. Less eften blue, green, black, translucent white, pink, violet, orange, purpie an reid.
Creestal habit Octahedral
Cleavage 111 (perfect in fower directions)
Fractur Conchoidal (shell-lik)
Mohs scale haurdness 10
Skinkle Adamantine
Streak Colorless
Diaphaneity Transparent tae subtransparent tae translucent
Speceefic gravity 3.52±0.01
Density 3.5–3.53 g/cm3
Polish skinkle 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 parteecular, diamond haes the heichest hardness an thermal conductivity o ony 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.