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Variscite Mineral Data + |
General Variscite Information |
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| AlPO4·2(H2O) | |||
| Molecular Weight = 157.98 gm | |||
| Aluminum 17.08 % Al 32.27 % Al2O3 | |||
| Phosphorus 19.61 % P 44.92 % P2O5 | |||
| Hydrogen 2.55 % H 22.81 % H2O | |||
| Oxygen 60.76 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Al(PO4)·2(H2O) | |||
| High-phosphate, meteoric waters acting on aluminous rocks. | |||
| Valid Species (Pre-IMA) 1837 | |||
| Messbach, Plauen, Vogtland (Variscia), Thuringen, Germany Link to MinDat.org Location Data. | |||
| Named after Variscia, the historical name of Vogtland, Germany. | |||
| Barrandite | |||
| Bolivarite | |||
| Lucinite | |||
| Utahlite | |||
Variscite Image | |||
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Variscite Crystallography |
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| a:b:c =1.0248:1:1.7784 | |||
| a = 9.9, b = 9.66, c = 17.18, Z = 16; V = 1,642.99 Den(Calc)= 2.55 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcab | |||
| By Intensity(I/Io): 4.29(1), 5.39(0.6), 4.83(0.45), | |||
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Physical Properties of Variscite |
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| [010] Perfect | |||
| Blue green, Colorless, Green, Light green. | |||
| 2.5 - 2.52, Average = 2.5 | |||
| Transparent to Translucent | |||
| Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | |||
| Encrustations - Forms crust-like aggregates on matrix. | |||
| Massive - Uniformly indistinguishable crystals forming large masses. | |||
| Reniform - "Kidney like" in shape (e.g.. hematite). | |||
| 4-5 - Fluorite-Apatite | |||
| None. | |||
| Earthy (Dull) | |||
| white | |||
Optical Properties of Variscite |
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| CI meas= -0.023 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.007 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2281,KPDmeas= 0.2317,KC= 0.2266 |
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| Biaxial (-), a=1.563, b=1.588, g=1.594, bire=0.0310, 2V(Calc)=50, 2V(Meas)=moderate. Dispersion r < v weak. | |||
| none. | |||
| none. | |||
| none. | |||
Calculated Properties of Variscite |
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relectron=2.58 gm/cc |
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| Fermion Index = 0.00029 Boson Index = 0.99971 |
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PEVariscite = 1.49 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Variscite is Not Radioactive |
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Variscite Classification |
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| 40.4.1.1 (40)Hydrated Phosphates, etc | |||
| (40.4)where A+++ XO4 · x(H2O) | |||
| (40.4.1)Dana Group | |||
| VII/C.09-50 VII - Phosphates, Arsenates and Vanadates | |||
| VII/C - Water-bearing phosphates without unfamiliar anions. cations of medium and small size: Be and Mn, Fe, Cu, Zn, Mg | |||
| VII/C.09 - Variscite group | |||
Other Variscite Information |
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| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | |||
| Links to other databases for Variscite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - CalTech Mineral Spectroscopy 6 - Crocoite.com Mineral Locations 7 - EUROmin Project 8 - Glendale Community College 9 -Google Images 10 -Google Scholar 11 -Handbook of Mineralogy (UofA) 12 - HyperPhysics 13 -MinDAT 14 -MinMax(Deutsch) 15 -MinMax(English) 16 -Mineralienatlas (Deutsch) 17 - Minerals of Wisconsin 18 - Philatelic Mineralogy 19 -QUT Mineral Atlas 20 - Tradeshop.com - The Rainbow of Gems 21 - WWW-MINCRYST 22 - YupRocks 23 -École des Mines de Paris Search for Variscite using: Visit our Advertisers for Variscite : Translate Variscite Mineral Data : Ask about Variscite here : Print or Cut-and-Paste your Variscite Specimen Label here :
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