Meta-alunogen Mineral Data

General Meta-alunogen Information

Chemical Formula:

Al4(SO4)6•27(H2O)

Composition:

Molecular Weight = 1,170.72 gm

Aluminum 9.22 % Al 17.42 % Al₂O₃

Hydrogen 4.65 % H 41.55 % H₂O

Sulfur 16.43 % S 41.03 % SO₃

Oxygen 69.70 % O

______ ______

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

Crystal System:

Monoclinic

Physical Properties of Meta-alunogen

Color:

White.

Luster:

Waxy

Optical Properties of Meta-alunogen

Optical Data:

Biaxial (+), a=1.469, b=1.473, g=1.491, bire=0.0220

Calculated Properties of Meta-alunogen

Fermion Index:

Fermion Index = 0.0015740733
Boson Index = 0.9984259267

Photoelectric:

PE_{Meta-alunogen}= 1.37 barns/electron
U=PE_{Meta-alunogen} x rElectron Density= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Meta-alunogen is Not Radioactive

Meta-alunogen Classification

Dana Class:

29.08.07.01 (29)Hydrated Acid and Sulfates

(29.08)where (A)2 (XO4)3 · x(H2O)

(29.08.07)Dana Group

29.08.07.01 Meta-alunogen Al4(SO4)6•27(H2O) Mono

Strunz Class:

07.CB.45 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CB -With only medium-sized cations

07.CB.45 Alunogen Al2(SO4)3•17(H2O) P1 1

07.CB.45 Meta-alunogen Al4(SO4)6•27(H2O) Mono

Other Meta-alunogen Information

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 :

Meta-alunogen

Al4(SO4)6•27(H2O)
Dana No: 29.08.07.01 Strunz No: 07.CB.45
Locality:

Notes: