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Ammonioalunite Mineral Data

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General Ammonioalunite Information

Help on Chemical  Formula: Chemical Formula: (NH4)Al3(SO4)2(OH)6
Help on Composition: Composition: Molecular Weight = 393.15 gm
   Aluminum  20.59 %  Al   38.90 % Al2O3
   Hydrogen   1.03 %  H      -   % Calc as (NH4)2O
   Hydrogen   1.54 %  H    13.75 % H2O
   Sulfur    16.31 %  S    40.73 % SO3
   Nitrogen   3.56 %  N     6.62 % (NH4)2O
   Oxygen    56.97 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)Al3(SO4)2(OH)6
Help on Environment: Environment: Acidic hot springs with temperatures below 100 deg C and low potassium content of the waters.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: The Geysers, Sonoma County, California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition (Ammonia, Al,).
Help on Name Pronunciation: Name Pronunciation: Ammonioalunite + Pronunciation Say AMMONIOALUNITE
 

Ammonioalunite Image

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  Ammonioalunite   Kaolinite

Comments: White chalky ammonioalunite on darker kaolinite.
Location: Schoeller Mine, Kladno, Stredocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ammonioalunite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.55026
Help on Cell Dimensions: Cell Dimensions: a = 7.013, c = 17.885, Z = 3; V = 761.78 Den(Calc)= 2.57
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.023(1), 5.04(0.93), 2.996(0.5),
 

Physical Properties of Ammonioalunite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Gray white, White.
Help on Density: Density: 2.4
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Ammonioalunite

Help on Gladstone-Dale: Gladstone-Dale: 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
Help on Optical Data: Optical Data: Uniaxial (+), w=1.59, e=1.602, bire=0.0120.
 

Calculated Properties of Ammonioalunite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.61 gm/cc
note: Specific Gravity of Ammonioalunite =2.57 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEAmmonioalunite = 1.62 barns/electron
U=PEAmmonioalunite x rElectron Density= 4.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ammonioalunite is Not Radioactive
 

Ammonioalunite Classification

Help on  Dana Class: Dana Class: 30.02.04.06 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen
  (30.02)where (A B)2 XO4 Zq
  (30.02.04)Alunite Group (Alunite Subgroup)
 
30.02.04.01 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig
 
30.02.04.02 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.03 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.04 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m
 
30.02.04.05 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.06 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.07 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 
30.02.04.08 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 07.BC.10 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
 
07.BC.10 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig
 
07.BC.10 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Jarosite KFe3(SO4)2(OH)6 R 3 3
 
07.BC.10 Hydroniumjarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m
 
07.BC.10 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m
 
07.BC.10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m
 
07.BC.10 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m
 

Other Ammonioalunite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.73,p145-152,1988)
Help on See Also: See Also: 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

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Print or Cut-and-Paste your Ammonioalunite Specimen Label here :

Ammonioalunite

(NH4)Al3(SO4)2(OH)6
Dana No: 30.02.04.06 Strunz No: 07.BC.10
Locality:

 

Notes:

 

 
   
 


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