General Olivine Information(Mg,Fe)2SiO4 |
Molecular Weight = 153.31 gm |
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Magnesium 25.37 % Mg 42.06 % MgO |
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Iron 14.57 % Fe 18.75 % FeO |
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Silicon 18.32 % Si 39.19 % SiO2 |
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Oxygen 41.74 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
Mg1.6Fe2+0.4(SiO4) |
Basic and ultra basic igneous rocks. Goup species name. |
Not Approved IMA |
Common world wide occurrence. Link to MinDat.org Location Data. |
Named after the green color. |
Olivine |
Calcio-olivine - calcium-dominant member of the olivine group |
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Chrysolite - light yellowish green |
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Peridot |
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Olivine Crystallographya:b:c =0.4663:1:0.6146 |
a = 4.78, b = 10.25, c = 6.3, Z = 4; V = 308.67 Den(Calc)= 3.30 |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm |
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| Physical Properties of Olivine{001} Good, {010} Distinct |
Yellowish green, Olive green, Greenish black, Reddish brown. |
3.27 - 3.37, Average = 3.32 |
Transparent to translucent |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
Massive - Granular - Common texture observed in granite and other igneous rock. |
6.5-7 - Pyrite-Quartz |
Non-fluorescent. |
Vitreous (Glassy) |
white |
| Optical Properties of OlivineCI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2,KPDmeas= 0.1988,KC= 0.2009 Ncalc = 1.66 - 1.68 Biaxial (+), a=1.63-1.65, b=1.65-1.67, g=1.67-1.69, bire=0.0400, 2V(Calc)=88, 2V(Meas)=46-98. Dispersion relatively weak. |
| Calculated Properties of OlivineBulk Density (Electron Density)=3.25 gm/cc |
note: Specific Gravity of Olivine =3.30 gm/cc. Fermion Index = 0.03 |
Boson Index = 0.97 PEOlivine = 5.56 barns/electron |
U=PEOlivine x rElectron Density= 18.11 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Olivine is Not Radioactive | Olivine Classification51.03.01.00 (51)Nesosilicate Insular SiO4 Groups Only |
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(51.03)with all cations in octahedral [6] coordination |
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(51.03.01)Olivine group |
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09.AC.05 09 - SILICATES (Germanates) |
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09.A - Nesosilicates |
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09.AC -Nesosilicates without additional anions; |
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| Other Olivine InformationNAME( Duda&Rejl90) PHYS. PROP.(Dana) OPTIC PROP.(Dana) |
Links to other databases for Olivine : |
1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Amethyst Galleries' Mineral Gallery 4 - Athena 5 - CalTech Mineral Spectroscopy 6 - GeoScienceWorld 7 - Glendale Community College 8 - Google Images 9 - Google Scholar 10 - HyperPhysics 11 - MinDAT 12 - Mineral and Gemstone Kingdom 13 - Mineralienatlas (Deutsch) 14 - Minerals in Thin Section-University of North Carolina 15 - Minerals in Thin Sections-Humboldt State 16 - Online Mineral Museum 17 - Philatelic Mineralogy 18 - QUT Mineral Atlas 19 - Ruff.Info 20 - Tradeshop.com - The Rainbow of Gems 21 - UCLA - Petrography Thin-Sections 22 - University of Colorado - Mineral Structure Data 23 - University of Texas at Austin 24 - WWW-MINCRYST Search for Olivine using: Visit our Advertisers for Olivine : B and L Fine MineralsDakota Matrix Minerals Dan & Diana Weinrich Mineral Auctions Excalibur Mineral Corp. Exceptional Minerals John Betts Fine Minerals Mineral News Mineral of the Month Club NY/NJ Gem & Mineral Show TIMA Mineral Analyzer Weinrich Minerals, Inc. Wright's Rock Shop Ask about Olivine here : Print or Cut-and-Paste your Olivine Specimen Label here :
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