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Silicon Mineral Data
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General Silicon Information
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 Chemical Formula: |
Si |
| Composition: |
Molecular Weight = 28.09 gm |
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Silicon 100.00 % Si |
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______ |
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100.00 % |
| Empirical Formula: |
Si |
| 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 |
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PDF 27-1402 |
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Silicium |
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Silicon Image |
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Images:
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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 |
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Silicon Crystallography
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| Cell Dimensions: |
a = 5.431, Z = 8; V = 160.19 Den(Calc)= 2.33 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.134(1), 1.917(0.5), 1.644(0.1), |
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Physical Properties of Silicon
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| 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 |
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Calculated Properties of Silicon
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| Electron Density: |
Bulk Density (Electron Density)=2.32 gm/cc
note: Specific Gravity of Silicon =2.33 gm/cc.
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| Fermion Index: |
Fermion Index = 0.04
Boson Index = 0.96 |
| Photoelectric: |
PESilicon = 3.34 barns/electron
U=PESilicon x rElectron Density= 7.76 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Silicon is Not Radioactive |
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Silicon Classification
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| Dana Class: |
01.03.07.01 (01)Native Elements |
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(01.03)with semi-metallic and non-metallic elements |
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(01.03.07)Dana Group |
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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) |
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01.C - Metalloids and Nonmetals |
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01.CB -Carbon-silicon family |
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01.CB.15 Silicon Si F d3m 4/m 3 2/m |
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Other Silicon Information
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| 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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Silicon
Si
Dana No: 01.03.07.01 Strunz No: 01.CB.15
Locality:
Notes:
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