[How the Club Works] [Memberships - Junior, Deluxe , and Platinum] [FAQ] [Past Minerals] Join the Club - Junior, Deluxe and Platinum Memberships Available High Quality Minerals Sent to Your Home or School Each Month Mineral of the Month Club - An Inexpensive Way to Enjoy Minerals General Orthochrysotile InformationMg3Si2O5(OH)4 |
Molecular Weight = 277.11 gm |
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Magnesium 26.31 % Mg 43.63 % MgO |
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Silicon 20.27 % Si 43.36 % SiO2 |
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Hydrogen 1.45 % H 13.00 % H2O |
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Oxygen 51.96 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
Mg3Si2O5(OH)4 |
Metamorphosed and hydrothermally-altered ultra-basic rocks. Orthochrysotile (1951) is now regarded as polytype of chrysotile. |
Discredited IMA 2006 - Valid Species (Pre-IMA) 1951 |
Link to MinDat.org Location Data. |
From the orthorhombic crystal symmetry and Greek chrysos - "gold" and tilos - "fiber." |
Orthochrysotile + Pronunciation |
Asbestos |
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Chrysotile |
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Mitaxite - splintery |
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Orthochrysotile Crystallographya:b:c =0.5772:1:1.5351 |
a = 5.34, b = 9.25, c = 14.2, Z = 4; V = 701.41 Den(Calc)= 2.62 |
OrthorhombicSpace Group: Unk |
By Intensity(I/Io): 7.1(1), 2.33(0.8), 3.55(0.7),2.5(0.5), 4.4(0.4), 1.615(0.3), 3.88(0.3), 4.63(0.2), |
| Physical Properties of Orthochrysotile{???} Distinct |
Brownish, Colorless, Green, Gray, Gray brown. |
2.53 - 2.65, Average = 2.59 |
Translucent to opaque |
Fibrous - Thin, elongated fractures produced by crystal forms or intersecting cleavages (e.g. asbestos). |
Amorphous - No crystalline form or imitative shape. |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
Massive - Fibrous - Distinctly fibrous fine-grained forms. |
2.5-3 - Finger Nail-Calcite |
Non-fluorescent. |
Silky |
white |
| Optical Properties of OrthochrysotileCI meas= 0.027 (Excellent) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2133,KPDmeas= 0.2158,KC= 0.2217 Ncalc = 1.56 - 1.59 Biaxial (-), a=1.545-1.569, b=1.546-1.569, g=1.553-1.571, bire=0.0020-0.0080, 2V(Calc)=0-42, 2V(Meas)=20-60. Dispersion relatively weak. |
| Calculated Properties of OrthochrysotileBulk Density (Electron Density)=2.62 gm/cc |
note: Specific Gravity of Orthochrysotile =2.59 gm/cc. Fermion Index = 0.03 |
Boson Index = 0.97 PEOrthochrysotile = 1.39 barns/electron |
U=PEOrthochrysotile x rElectron Density= 3.64 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Orthochrysotile is Not Radioactive | Orthochrysotile Classification71.01.02d.02 (71)Phyllosilicate Sheets of Six-Membered Rings |
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(71.01)with 1:1 layers |
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(71.01.02d)Serpentine group (Chrysotile subgroup) |
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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 Orthochrysotile InformationNAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) |
Links to other databases for Orthochrysotile : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Franklin Minerals(Dunn) 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - MinMax(Deutsch) 12 - MinMax(English) 13 - Mineral and Gemstone Kingdom 14 - Mineralienatlas (Deutsch) 15 - QUT Mineral Atlas 16 - Ruff.Info Search for Orthochrysotile using: Visit our Advertisers for Orthochrysotile : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Orthochrysotile Mineral Data : Ask about Orthochrysotile here : Print or Cut-and-Paste your Orthochrysotile Specimen Label here :
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