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Alunogen Mineral Data + |
General Alunogen Information |
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| Al2(SO4)3·17(H2O) | |||
| Molecular Weight = 648.41 gm | |||
| Aluminum 8.32 % Al 15.72 % Al2O3 | |||
| Hydrogen 5.29 % H 47.23 % H2O | |||
| Sulfur 14.84 % S 37.04 % SO3 | |||
| Oxygen 71.56 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Al2(SO4)3·17(H2O) | |||
| Secondary mineral commonly associated with coals and pyritiferous shales in arid regions. | |||
| Valid Species (Pre-IMA) 1832 | |||
| Alum Mountain district, Grant County, New Mexico, USA. Link to MinDat.org Location Data. | |||
| From the Latin alumen ="alum" and the Greek genos ="origin." | |||
| Aluminum Sulfate | |||
| Doughtyite | |||
| ICSD 4292 | |||
| Keramohalite | |||
| PDF 26-1010 | |||
Alunogen Image | |||
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Alunogen Crystallography |
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| a:b:c =0.2751:1:0.2247 | |||
| a = 7.42, b = 26.97, c = 6.062, Z = 2; alpha = 89.95°, beta = 97.566°, gamma = 91.888° V = 1,201.90 Den(Calc)= 1.79 | |||
| Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 | |||
| By Intensity(I/Io): 4.49(1), 4.33(0.8), 4.39(0.8),13.5(0.6), 3.68(0.5), 3.9(0.5), 3.02(0.4), | |||
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Physical Properties of Alunogen |
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| [010] Perfect, [100] Very Good, [313] Distinct | |||
| White, Yellowish white, Reddish white, Yellowish white. | |||
| 1.65 - 1.78, Average = 1.71 | |||
| Transparent | |||
| Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces. | |||
| Acicular - Occurs as needle-like crystals. | |||
| Encrustations - Forms crust-like aggregates on matrix. | |||
| Fibrous - Crystals made up of fibers. | |||
| 1.5-2 - Talc-Gypsum | |||
| None. | |||
| Vitreous - Pearly | |||
| white | |||
Optical Properties of Alunogen |
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| CI meas= -0.072 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= -0.027 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2657,KPDmeas= 0.2774,KC= 0.2587 |
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| Biaxial (+), a=1.473, b=1.474, g=1.48, bire=0.0070, 2V(Calc)=46, 2V(Meas)=31-69. Dispersion none. | |||
Calculated Properties of Alunogen |
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relectron=1.88 gm/cc |
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| Fermion Index = 0.00146 Boson Index = 0.99854 |
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PEAlunogen = 1.26 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Alunogen is Not Radioactive |
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Alunogen Classification |
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| 29.8.6.1 (29)Hydrated Acid and Sulfates | |||
| (29.8)where (A)2 (XO4)3 · x(H2O) | |||
| (29.8.6)Dana Group | |||
| VI/C.08-70 VI - Sulfates,Chromates,Molybdates and Tungstates | |||
| VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium size | |||
| VI/C.08 - Rhomboclase - Meta-alunogen series | |||
Other Alunogen Information |
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| NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32) | |||
| Links to other databases for Alunogen : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST Search for Alunogen using: Visit our Advertisers for Alunogen : Translate Alunogen Mineral Data : Ask about Alunogen here : Print or Cut-and-Paste your Alunogen Specimen Label here :
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