Evansite Mineral Data + 
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- 42.1.2.1 Evansite Al3(PO4)(OH)6·6(H2O)(?) None
- VII/D.23-10 Sieleckiite Cu3Al4(PO4)2(OH)12·2(H2O) P1 or P1 Tri
- VII/D.23-20 Rosieresite (Pb,Cu,Al)(PO4)x·n(H2O) None
- VII/D.23-30 Evansite Al3(PO4)(OH)6·6(H2O)(?) None
- VII/D.23-40 Liskeardite (Al,Fe)3(AsO4)(OH)6·5(H2O) Unk Ortho
General Evansite Information |
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 Chemical Formula: |
Al3(PO4)(OH)6·6(H2O) (?) | ||
| Composition: |
Molecular Weight = 386.05 gm | ||
| Aluminum 20.97 % Al 39.62 % Al2O3 | |||
| Phosphorus 8.02 % P 18.38 % P2O5 | |||
| Hydrogen 4.70 % H 42.00 % H2O | |||
| Oxygen 66.31 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Al3(PO4)(OH)6·6(H2O) | ||
| IMA Status: |
Valid Species (Pre-IMA) 1864 | ||
| Locality: |
Zelezník Mt, Sirk, Slovakia Link to MinDat.org Location Data. | ||
| Name Origin: |
Named after the English metallurgist, Brooke Evans (1797-1862), | ||
Evansite Image | |||
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Images:
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Evansite Crystallography |
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| Crystal System: |
Amorphous- No Crystals | ||
Physical Properties of Evansite |
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| Cleavage: |
None | ||
| Color: |
Colorless, White, Yellow, Green, Blue. | ||
| Density: |
1.9 - 2, Average = 1.95 | ||
| Diaphaniety: |
Transparent to translucent | ||
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | ||
| Habit: |
Botryoidal - "Grape-like" rounded forms (e.g.. malachite). | ||
| Habit: |
Reniform - "Kidney like" in shape (e.g.. hematite). | ||
| Habit: |
Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite). | ||
| Hardness: |
3.5-4 - Copper Penny-Fluorite | ||
| Luminescence: |
None. | ||
| Luster: |
Vitreous - Pearly | ||
| Magnetism: |
Nonmagnetic | ||
| Streak: |
white | ||
Optical Properties of Evansite |
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| Gladstone-Dale: |
CI meas= 0.038 (Excellent) - where the CI = (1-KPDmeas/KC) KPDmeas= 0.2487,KC= 0.2584 |
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| Optical Data: |
Isotropic, n=1.485. | ||
Calculated Properties of Evansite |
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| Electron Density: |
relectron=2.02 gm/cc |
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| Fermion Index |
Fermion Index = 0.00032 Boson Index = 0.99968 |
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| Photoelectric: |
PEEvansite = 1.11 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Evansite is Not Radioactive |
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Evansite Classification |
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| Dana Class: |
42.1.2.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen | ||
| (42.1)where (A)3 (XO4) Zq · x(H2O) | |||
| (42.1.2)Dana Group | |||
| Strunz Class: |
VII/D.23-30 VII - Phosphates, Arsenates and Vanadates | ||
| VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe | |||
| VII/D.23 - Sieleckiite - Liskeardite series | |||
Other Evansite Information |
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| References: |
NAME( Duda&Rejl90) PHYS. PROP.(Duda&Rejl90) OPTIC PROP.(Ford32) | ||
| See Also: |
Links to other databases for Evansite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 - Minerals of Wisconsin 13 -QUT Mineral Atlas 14 -École des Mines de Paris Search for Evansite using: Visit our Advertisers for Evansite : AA Mineral SpecimensB & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals T G Fine Minerals Wrights Rock Shop Translate Evansite Mineral Data : Ask about Evansite here : Print or Cut-and-Paste your Evansite Specimen Label here :
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