Silicon Mineral Data

General Silicon Information

Chemical Formula:

Composition:

Molecular Weight = 28.09 gm

Silicon 100.00 % Si

______

100.00 %

Empirical Formula:

Environment:

Volcanic exhalations and minor inclusions in gold and other mantle-derived rocks. High purity synthetic material used in semiconductor manufacture.

IMA Status:

Approved IMA 1983

Locality:

Tolbachik, Kamchatka. Link to MinDat.org Location Data.

Name Origin:

From the Latin, silicis = "flint."

Name Pronunciation:

Silicon

Synonym:

ICSD 60385

PDF 27-1402

Silicium

Silicon Image

Images:

Silicon Moissanite

Comments: Backscattered electron image of metallic inclusion in moissanite (SiC). The gray shading in the BSE mage consists mainly of pure silicon (Si metal). The brighter areas are composed of Fe-silicide. (AmMin, 88:1818).
Location: Found in a cobble at a beach along the Turkish coast of the Mediterranean Sea, around 150 km NW from Izmir, and is most likely derived from Tertiary volcanic rocks outcropping in the area. Scale: Scalebar 200 µ-m.
© American Mineralogist

Silicon Crystallography

Cell Dimensions:

a = 5.431, Z = 8; V = 160.19 Den(Calc)= 2.33

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): 3.134(1), 1.917(0.5), 1.644(0.1),

Crystal Structure:

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drag2 - RMB Resize/Rotate
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Wyckoff R W G , Crystal Structures , 1 (1963) p.7-83, Second edition. Interscience Publishers, New York, New York, Sample at T = 300 K

View Additional jPOWD Structure files for Silicon
[1]

Physical Properties of Silicon

Cleavage:

None

Color:

Iron black, Reddish brown.

Diaphaneity:

Opaque

Fracture:

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

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

7 - Quartz

Luster:

Metallic

Streak:

black

Calculated Properties of Silicon

Electron Density:

Bulk Density (Electron Density)=2.32 gm/cc
note: Specific Gravity of Silicon =2.33 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Silicon= 3.34 barns/electron
U=PE_Silicon x rElectron Density= 7.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Silicon is Not Radioactive

Silicon Classification

Dana Class:

01.03.07.01 (01)Native Elements

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

(01.03.07)Dana Group

01.03.07.01 Silicon Si F d3m 4/m 3 2/m

Strunz Class:

01.CB.15 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)

01.C - Metalloids and Nonmetals

01.CB -Carbon-silicon family

01.CB.15 Silicon Si F d3m 4/m 3 2/m

Other Silicon Information

References:

NAME( Dana8) PHYS. PROP.(Dana8)

See Also:

Links to other databases for Silicon :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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Ask about Silicon here :
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Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Silicon Specimen Label here :

Silicon

Si
Dana No: 01.03.07.01 Strunz No: 01.CB.15
Locality:

Notes: