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Meta-alunogen Mineral Data
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General Meta-alunogen Information
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 Chemical Formula: |
Al4(SO4)6•27(H2O) |
| Composition: |
Molecular Weight = 1,170.72 gm |
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Aluminum 9.22 % Al 17.42 % Al2O3 |
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Hydrogen 4.65 % H 41.55 % H2O |
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Sulfur 16.43 % S 41.03 % SO3 |
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Oxygen 69.70 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Al4(SO4)6•27(H2O) |
| Environment: |
Formed by dehydration of alunogen. |
| IMA Status: |
Valid Species (Pre-IMA) 1942 |
| Locality: |
Alum mines 3.5 km south of Francisco de Vergara, Antofagasta, Chile Link to MinDat.org Location Data. |
| Name Origin: |
Named for meta, indicating a lower hydrate, and alunogen. |
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Meta-alunogen Crystallography
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| Crystal System: |
Monoclinic |
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Physical Properties of Meta-alunogen
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| Color: |
White. |
| Luster: |
Waxy |
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Optical Properties of Meta-alunogen
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| Optical Data: |
Biaxial (+), a=1.469, b=1.473, g=1.491, bire=0.0220 |
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Calculated Properties of Meta-alunogen
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| Fermion Index: |
Fermion Index = 0.0015740733
Boson Index = 0.9984259267 |
| Photoelectric: |
PEMeta-alunogen = 1.37 barns/electron
U=PEMeta-alunogen x rElectron Density= . barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Meta-alunogen is Not Radioactive |
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Meta-alunogen Classification
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| Dana Class: |
29.08.07.01 (29)Hydrated Acid and Sulfates |
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(29.08)where (A)2 (XO4)3 � x(H2O) |
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(29.08.07)Dana Group |
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29.08.07.01 Meta-alunogen Al4(SO4)6•27(H2O) Mono |
| Strunz Class: |
07.CB.45 07 - SULFATES (SELENATES, TELLURATES) |
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07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O |
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07.CB -With only medium-sized cations |
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07.CB.45 Alunogen Al2(SO4)3•17(H2O) P1 1 |
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07.CB.45 Meta-alunogen Al4(SO4)6•27(H2O) Mono |
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Other Meta-alunogen Information
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| References: |
NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Meta-alunogen :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Print or Cut-and-Paste your Meta-alunogen Specimen Label here :
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Meta-alunogen
Al4(SO4)6•27(H2O)
Dana No: 29.08.07.01 Strunz No: 07.CB.45
Locality:
Notes:
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Notes:
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