General Antigorite Information![]() (Mg,Fe++)3Si2O5(OH)4 |
![]() Molecular Weight = 300.77 gm |
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Magnesium 18.18 % Mg 30.15 % MgO |
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Iron 13.93 % Fe 17.92 % FeO |
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Silicon 18.68 % Si 39.95 % SiO2 |
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Hydrogen 1.34 % H 11.98 % H2O |
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Oxygen 47.88 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
![]() Mg2.25Fe2+0.75(Si2O5)(OH)4 |
![]() Common in regional and contact metamorphosed serpentinites |
![]() Valid Species (Pre-IMA) 1840 |
![]() Antigorio, Italy Link to MinDat.org Location Data. |
![]() Named after its locality. From the Latin, serpens - "snake." |
![]() Antigorite + Pronunciation |
![]() ![]() Bowenite |
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Jenkinsite |
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Picrosmine |
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Protoantigorite |
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Williamsite |
| | Antigorite Image
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Antigorite Crystallography![]() a:b:c =4.7013:1:0.7844 |
![]() a = 43.53, b = 9.259, c = 7.263, Z = 16; beta = 91.633° V = 2,926.12 Den(Calc)= 2.73 |
![]() Monoclinic - DomaticH-M Symbol (m) Space Group: Cm |
![]() By Intensity(I/Io): 2.53(1), 7.29(1), 3.61(0.8), |
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| Physical Properties of Antigorite![]() {001} Good |
![]() Green, Gray, Bluish gray, Brown, Black. |
![]() 2.5 - 2.6, Average = 2.54 |
![]() Translucent to Subopaque |
![]() Brittle - Generally displayed by glasses and most non-metallic minerals. |
![]() Massive - Uniformly indistinguishable crystals forming large masses. |
![]() Platy - Sheet forms (e.g. micas). |
![]() Scaly - Morphology like fish scales. |
![]() 3.5-4 - Copper Penny-Fluorite |
![]() Vitreous - Greasy |
![]() greenish white |
| Optical Properties of Antigorite![]() CI meas= -0.017 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2068,KPDmeas= 0.2214,KC= 0.2178 Ncalc = 1.54 - 1.59 ![]() Biaxial (-), a=1.555-1.567, b=1.56-1.573, g=1.56-1.573, bire=0.0050-0.0060, 2V(Calc)=0, 2V(Meas)=20-50. Dispersion weak, r > v. |
![]() pale greenish yellow. |
![]() light green. |
![]() light green. |
| Calculated Properties of Antigorite![]() Bulk Density (Electron Density)=2.55 gm/cc |
note: Specific Gravity of Antigorite =2.55 gm/cc. ![]() Fermion Index = 0.03 |
Boson Index = 0.97 ![]() PEAntigorite = 5.20 barns/electron |
U=PEAntigorite x rElectron Density= 13.27 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Antigorite is Not Radioactive | Antigorite Classification![]() 71.01.02a.01 (71)Phyllosilicate Sheets of Six-Membered Rings |
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(71.01)with 1:1 layers |
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(71.01.02a)Serpentine group |
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![]() 09.ED.15 09 - SILICATES (Germanates) |
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09.E - Phyllosilicates |
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09.ED -Phyllosilicates with kaolinite layers |
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| Other Antigorite Information![]() NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) |
![]() Links to other databases for Antigorite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - HyperPhysics 11 - MinDAT 12 - Mineralienatlas (Deutsch) 13 - Online Mineral Museum 14 - QUT Mineral Atlas 15 - Ruff.Info 16 - WWW-MINCRYST Search for Antigorite using: Visit our Advertisers for Antigorite : A Bijoux Google Search for AntigoriteAdam's Minerals Google Search for Antigorite Cape Minerals Google Search for Antigorite Dakota Matrix Minerals Google Search for Antigorite Excalibur Mineral Corp. Google Search for Antigorite Exceptional Minerals Google Search for Antigorite John Betts Fine Minerals Search for Antigorite McDougall Minerals Google Search for Antigorite Mineral News Website Link Rock and Mineral Shows Google Search for Antigorite Weinrich Minerals, Inc. Google Search for Antigorite Ask about Antigorite here : Print or Cut-and-Paste your Antigorite Specimen Label here :
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