General Ammonioalunite Information![]() (NH4)Al3(SO4)2(OH)6 |
![]() Molecular Weight = 393.15 gm |
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Aluminum 20.59 % Al 38.90 % Al2O3 |
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Hydrogen 1.03 % H - % Calc as (NH4)2O |
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Hydrogen 1.54 % H 13.75 % H2O |
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Sulfur 16.31 % S 40.73 % SO3 |
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Nitrogen 3.56 % N 6.62 % (NH4)2O |
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Oxygen 56.97 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
![]() (NH4)Al3(SO4)2(OH)6 |
![]() Acidic hot springs with temperatures below 100 deg C and low potassium content of the waters. |
![]() Approved IMA 1987 |
![]() The Geysers, Sonoma County, California, USA. Link to MinDat.org Location Data. |
![]() Named for its composition (Ammonia, Al,). |
![]() Ammonioalunite + Pronunciation |
![]() | | Ammonioalunite Image
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Ammonioalunite Crystallography![]() a:c = 1:2.55026 |
![]() a = 7.013, c = 17.885, Z = 3; V = 761.78 Den(Calc)= 2.57 |
![]() Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m |
![]() By Intensity(I/Io): 3.023(1), 5.04(0.93), 2.996(0.5), |
| Physical Properties of Ammonioalunite![]() {???} Good |
![]() Gray white, White. |
![]() 2.4 |
![]() Transparent to Translucent |
![]() Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation. |
![]() Massive - Granular - Common texture observed in granite and other igneous rock. |
![]() Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals. |
![]() 2-3 - Gypsum-Calcite |
![]() Non-fluorescent. |
![]() Vitreous (Glassy) |
![]() white |
| Optical Properties of Ammonioalunite![]() CI meas= -0.246 (Poor) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.163 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2319,KPDmeas= 0.2483,KC= 0.1994 Ncalc = 1.48 - 1.51 ![]() Uniaxial (+), w=1.59, e=1.602, bire=0.0120. |
| Calculated Properties of Ammonioalunite![]() Bulk Density (Electron Density)=2.61 gm/cc |
note: Specific Gravity of Ammonioalunite =2.57 gm/cc. ![]() Fermion Index = 0.03 |
Boson Index = 0.97 ![]() PEAmmonioalunite = 1.62 barns/electron |
U=PEAmmonioalunite x rElectron Density= 4.24 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Ammonioalunite is Not Radioactive | Ammonioalunite Classification![]() 30.02.04.06 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen |
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(30.02)where (A B)2 XO4 Zq |
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(30.02.04)Alunite Group (Alunite Subgroup) |
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![]() 07.BC.10 07 - SULFATES (SELENATES, TELLURATES) |
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07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O |
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07.BC -With medium-sized and large cations |
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| Other Ammonioalunite Information![]() NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.73,p145-152,1988) |
![]() Links to other databases for Ammonioalunite : |
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 Ammonioalunite using: Visit our Advertisers for Ammonioalunite : A Bijoux Google Search for AmmonioaluniteAdam's Minerals Google Search for Ammonioalunite Cape Minerals Google Search for Ammonioalunite Dakota Matrix Minerals Google Search for Ammonioalunite Excalibur Mineral Corp. Google Search for Ammonioalunite Exceptional Minerals Google Search for Ammonioalunite John Betts Fine Minerals Search for Ammonioalunite McDougall Minerals Google Search for Ammonioalunite Mineral News Website Link Rock and Mineral Shows Google Search for Ammonioalunite Weinrich Minerals, Inc. Google Search for Ammonioalunite Ask about Ammonioalunite here : Print or Cut-and-Paste your Ammonioalunite Specimen Label here :
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