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General Zaherite Information |
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 Chemical Formula: |
Al12(SO4)5(OH)26•20H20 | ||
| Composition: |
Molecular Weight = 1,606.59 gm | ||
| Aluminum 20.15 % Al 38.08 % Al2O3 | |||
| Hydrogen 4.14 % H 37.00 % H2O | |||
| Sulfur 9.98 % S 24.92 % SO3 | |||
| Oxygen 65.73 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Al12(SO4)5(OH)26•20(H2O) | ||
| Environment: |
In a massive kaolinite-boehmite rock. | ||
| IMA Status: |
Approved IMA 1977 | ||
| Locality: |
Salt Range, Pakistan. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for M. A. Zaher, Geological Survey of Bangladesh, who discovered the mineral. | ||
| Name Pronunciation: |
Zaherite  |
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Zaherite Image | |||
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Images:
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Zaherite Crystallography |
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| Axial Ratios: |
a:b:c =0.9496:1:0.1938 | ||
| Cell Dimensions: |
a = 18.475, b = 19.454, c = 3.771, Z = 1; alpha = 95.24°, beta = 91.48°, gamma = 80.24° V = 1,329.70 Den(Calc)= 2.01 | ||
| Crystal System: |
TriclinicSpace Group: P1 or P1 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 18.12(1), 3.22(0.8), 4.61(0.8), | ||
Physical Properties of Zaherite |
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| Cleavage: |
{???} Good | ||
| Color: |
White, Light bluish green. | ||
| Density: |
2.007 - 2.011, Average = 2 | ||
| Diaphaneity: |
Transparent to Translucent | ||
| Habit: |
Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye. | ||
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. | ||
| Hardness: |
3.5 - Copper Penny | ||
| Luster: |
Earthy (Dull) | ||
| Streak: |
white | ||
Optical Properties of Zaherite |
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| Gladstone-Dale: |
CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2479,KPDmeas= 0.2481,KC= 0.2487 Ncalc = 1.5 |
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| Optical Data: |
Biaxial (+), a=1.498, b=1.4981, g=1.499, bire=0.0010, 2V(Calc)=38, 2V(Meas)=moderate. | ||
Calculated Properties of Zaherite |
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| Electron Density: |
Bulk Density (Electron Density)=2.08 gm/cc note: Specific Gravity of Zaherite =2.01 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0010701619 Boson Index = 0.9989298381 |
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| Photoelectric: |
PEZaherite = 1.29 barns/electron U=PEZaherite x rElectron Density= 2.67 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Zaherite is Not Radioactive |
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Zaherite Classification |
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| Dana Class: |
31.10.03.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen | ||
| (31.10)miscellaneous | |||
| (31.10.03)Dana Group | |||
| Strunz Class: |
07.DE.65 07 - SULFATES (SELENATES, TELLURATES) | ||
| 07.D - Sulfates (selenates, etc.) with additional anions, with H2O | |||
| 07.DE -With only medium-sized cations; unclassified | |||
Other Zaherite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Zaherite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Zaherite using: Visit our Advertisers for Zaherite : A Bijoux Google Search for ZaheriteAdam's Minerals Google Search for Zaherite Cape Minerals Google Search for Zaherite Dakota Matrix Minerals Google Search for Zaherite Excalibur Mineral Corp. Google Search for Zaherite Exceptional Minerals Google Search for Zaherite John Betts Fine Minerals Search for Zaherite McDougall Minerals Google Search for Zaherite Mineral News Website Link Rock and Mineral Shows Google Search for Zaherite Weinrich Minerals, Inc. Google Search for Zaherite Ask about Zaherite here : Print or Cut-and-Paste your Zaherite Specimen Label here :
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