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Parachrysotile Mineral Data + |
General Parachrysotile Information |
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| Mg3Si2O5(OH)4 | |||
| Molecular Weight = 277.11 gm | |||
| Magnesium 26.31 % Mg 43.63 % MgO | |||
| Silicon 20.27 % Si 43.36 % SiO2 | |||
| Hydrogen 1.45 % H 13.00 % H2O | |||
| Oxygen 51.96 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Mg3Si2O5(OH)4 | |||
| Metamorphosed and hydrothermally-altered ultra-basic rocks. | |||
| Valid Species (Pre-IMA) 1956 | |||
| Asbestos, Quebec, Canada. Link to MinDat.org Location Data. | |||
| Named for the crystal structure and the relationship to chrysotile which is from the Greek chrysos - "gold" and tilos - "fiber." | |||
| Amianthus | |||
| Asbestos | |||
| Chrysotile | |||
| Common asbestos | |||
Parachrysotile Image | |||
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Parachrysotile Crystallography |
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| a:b:c =0.576:1:1.5869 | |||
| a = 5.3, b = 9.2, c = 14.6, Z = 4; V = 711.90 Den(Calc)= 2.59 | |||
| OrthorhombicSpace Group: Unk | |||
Physical Properties of Parachrysotile |
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| [???] Distinct | |||
| Green, Red, Yellow, White. | |||
| 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 Parachrysotile |
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| CI meas= 0.027 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2158,KPDmeas= 0.2158,KC= 0.2217 |
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| 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 Parachrysotile |
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relectron=2.62 gm/cc |
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| Fermion Index = 0.03603 Boson Index = 0.96397 |
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PEParachrysotile = 1.39 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Parachrysotile is Not Radioactive |
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Parachrysotile Classification |
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| 71.1.2d.3 (71)Phyllosilicate Sheets of Six-Membered Rings | |||
| (71.1)with 1:1 layers | |||
| (71.1.2d)Serpentine group (Chrysotile subgroup) | |||
| VIII/H.27-50 VIII - Silicates | |||
| VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups | |||
| VIII/H.27 - Serpentine group | |||
Other Parachrysotile Information |
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| NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | |||
| Links to other databases for Parachrysotile : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 - Mineral and Gemstone Kingdom 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris Search for Parachrysotile using: Visit our Advertisers for Parachrysotile : Translate Parachrysotile Mineral Data : Ask about Parachrysotile here : Print or Cut-and-Paste your Parachrysotile Specimen Label here :
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