Diamond Mineral Data

Diamond Mineral Data +

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General Diamond Information

Chemical Formula:

Composition:

Molecular Weight = 12.01 gm

Carbon 100.00 % C

______

100.00 %

Empirical Formula:

Environment:

Gas rich, ultra-basic diatremes from mantle depths (>30 km)and alluvial placer deposits derived from the Kimberlite rocks. Kimberlite = olivine, garnet, pyroxene, and calcite.

IMA Status:

Valid Species (Pre-IMA) Prehistoric

Locality:

Kimberly, republic of South Africa. India. Brazil. Ural Mountains, Russia. Murfreesboro, Arkansas, USA. Link to MinDat.org Location Data.

Name Origin:

From the Greek, adamas, meaning "invincible" or "hardest."

Synonym:

Boart

Booart

Carbonado

Diamond Image

Images:

Diamond

Comments: Single octahedral crystal of diamond.
Location: Ghana, Africa. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Diamond

Comments: Translucent diamond penetration twin crystals.
Location: Mbuji-Mayi (Miba), Democratic Republic of the Congo (Zaire). Scale: 3.70 carats, 7x7x7 mm.
© John Betts - Fine Minerals

Images:

Diamond

Comments: Photomicrographs (PPL) of numerous microdiamonds in Kumdy-Kol caboniferous dolomite marble (Elements v1, no 2).
Location: Kokchetav Massif, Kumdy-Kol ultra high pressure facies area, northern Kazakhstan. Scale: See Image.
© Elements Magazine

Diamond Crystallography

Cell Dimensions:

a = 3.5668, Z = 8; V = 45.38 Den(Calc)= 3.52

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.06(1), 1.261(0.25), 1.0754(0.16),

Forms:

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Forms: [ 1 1 1]

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Crystal Structure:

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Wyckoff R W G , Crystal Structures , 1 (1963) p.7-83, Second edition. Interscience Publishers, New York, New York

Physical Properties of Diamond

Cleavage:

[111] Perfect, [111] Perfect, [111] Perfect

Color:

Colorless, White, Gray, Black, Blue.

Density:

3.5 - 3.53, Average = 3.51

Diaphaniety:

Transparent to Subtransparent to translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

10 - Diamond

Luminescence:

Fluorescent.

Luster:

Adamantine

Streak:

colorless

Optical Properties of Diamond

Optical Data:

Isotropic, n=2.4175-2.4178.

Calculated Properties of Diamond

Electron Density:

r_electron=3.52 gm/cc
note: r_Diamond=3.52 gm/cc.

Fermion Index

Fermion Index = 0.011
Boson Index = 0.989

Photoelectric:

PE_Diamond= 0.16 barns/electron
U=PE_Diamond x r_electron= 0.56 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Diamond is Not Radioactive

Diamond Classification

Dana Class:

1.3.6.1 (1)Native Elements

(1.3)with semi-metallic and non-metallic elements

(1.3.6)Carbon Polymorph group

1.3.6.1 Diamond C F d3m 4/m 3 2/m

1.3.6.2 Graphite C P 6₃/mmc 6/m 2/m 2/m

1.3.6.3 Lonsdaleite C P 6₃/mmc 6/m 2/m 2/m

1.3.6.4 Chaoite C P 6/mmm 6/m 2/m 2/m

1.3.6.5 Fullerite! C60 pseudo-CUBIC 4/m 2/m 2/m

Strunz Class:

I/B.02-40 I - Elements

I/B - Semimetals and nonmetals

I/B.02 - Carbon series, Graphite - Lonsdaleite

I/B.02-10 Graphite C P 6₃/mmc 6/m 2/m 2/m

I/B.02-20 Chaoite C P 6/mmm 6/m 2/m 2/m

I/B.02-30 Moissanite SiC P 6₃mc 6mm

I/B.02-40 Diamond C F d3m 4/m 3 2/m

I/B.02-50 Lonsdaleite C P 6₃/mmc 6/m 2/m 2/m

Other Diamond Information

References:

NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Diamond

C
Dana No: 1.3.6.1 Strunz No: I/B.02-40
Locality:

Notes: