Perhamite Mineral Data + 
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- 43.5.10.1 Perhamite Ca3Al7(SiO4)3(PO4)4(OH)3·16.5(H2O) P 6/mmm 6/m 2/m 2/m
- VIII/J.20-10 Perhamite Ca3Al7(SiO4)3(PO4)4(OH)3·16.5(H2O) P 6/mmm 6/m 2/m 2/m
- VIII/J.20-20 Viseite Ca10Al24(SiO4)6(PO4)7O22F3·72(H2O)(?) I a3d 4/m 3 2/m
- VIII/J.20-30 Tschortnerite! Ca4(Ca,Sr,K,Ba)3Cu3(OH)8[Si12Al12O48]·x(H2O),x>=20 F m3m 4/m 3 2/m
General Perhamite Information |
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 Chemical Formula: |
Ca3Al7(SiO4)3(PO4)4(OH)3·16.5(H2O) | ||
| Composition: |
Molecular Weight = 1,313.51 gm | ||
| Calcium 9.15 % Ca 12.81 % CaO | |||
| Aluminum 14.38 % Al 27.17 % Al2O3 | |||
| Silicon 6.41 % Si 13.72 % SiO2 | |||
| Phosphorus 9.43 % P 21.61 % P2O5 | |||
| Hydrogen 2.76 % H 24.69 % H2O | |||
| Oxygen 57.86 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca3Al7(SIO4)3(PO4)4(OH)3·16.5(H2O) | ||
| Environment: |
Found in a pegmatite vug. | ||
| IMA Status: |
Approved IMA 1977 | ||
| Locality: |
Bell Pit, Newry Hill, Newry, Maryland, USA. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Frank C. Perham (1934-), U.S. Geologist and pegmatite miner. | ||
Perhamite Image | |||
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Images:
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Perhamite Crystallography |
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| Axial Ratios: |
a:c = 1:2.87891 | ||
| Cell Dimensions: |
a = 7.02, c = 20.21, Z = 1; V = 862.52 Den(Calc)= 2.53 | ||
| Crystal System: |
Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.882(1), 5.8(0.71), 6.08(0.5), | ||
Physical Properties of Perhamite |
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| Cleavage: |
[0001] Perfect | ||
| Color: |
Light brown, White. | ||
| Density: |
2.64 | ||
| Habit: |
Platy - Sheet forms (e.g. micas). | ||
| Hardness: |
5 - Apatite | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Perhamite |
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| Gladstone-Dale: |
CI meas= 0.081 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.041 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2255,KPDmeas= 0.2161,KC= 0.2352 |
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| Optical Data: |
Uniaxial (+), w=1.564, e=1.577, bire=0.0130. | ||
Calculated Properties of Perhamite |
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| Electron Density: |
relectron=2.58 gm/cc |
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| Fermion Index |
Fermion Index = 0.0034 Boson Index = 0.9966 |
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| Photoelectric: |
PEPerhamite = 2.28 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Perhamite is Not Radioactive |
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Perhamite Classification |
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| Dana Class: |
43.5.10.1 (43)Compound Phosphates, etc. | ||
| (43.5)(Hydrated Compound Anions With Hydroxyl or Halogen) | |||
| (43.5.10)Dana Group | |||
| Strunz Class: |
VIII/J.20-10 VIII - Silicates | ||
| VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites | |||
| VIII/J.20 - Perhamite - Viseite series | |||
Other Perhamite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Perhamite : 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 (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris Search for Perhamite using: Visit our Advertisers for Perhamite : 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 Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Perhamite Mineral Data : Ask about Perhamite here : Print or Cut-and-Paste your Perhamite Specimen Label here :
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