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Meta-alunogen

Collectors Summary

Color weiß
Streak color weiß
Cleavages vollkommen
Crystal System orthorhombisch,

Chemism

Chem­ical formula

Al4(SO4)6·27H2O

Chem­ical com­po­si­tion

Aluminium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 1170.7192208 u; Number of atoms in the formula: 115

Info

Empirical formula:

Al4(SO4)6·27H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

4.65

54

46.96

1.0079470

54.4291380

Oxygen

O

69.70

51

44.35

15.9994300

815.9709300

Aluminium

Al

9.22

4

3.48

26.9815382

107.9261528

Sulfur

S

16.43

6

5.22

32.0655000

192.3930000

Strunz 9th edi­tion incl. updates

7.CB.45

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
B: Mit ausschließlich mittelgroßen Kationen
45:Alunogen-Gruppe

Lapis Clas­sifica­tion

VI/C.08-080

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
8: Mittelgroße Kationen

IMA sta­tus

Status fragwürdig

Optical Properties

Color

weiß

Streak color

weiß

Crystallography

Crystal Sys­tem

orthorhombisch

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

5

X-Ray Pow­der Diffrac­tion

12.2(20),
6.98(10),
6.11(10),
4.21(10),
4.07(100),
3.99(10),
3.86(10),
3.02(10)

XRD chart Meta-alunogen

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Physical Properties

Cleav­ages

vollkommen

Preface

Author (Name, Year)

Gordon, 1942

References

American Mineralogist 28 (1943), 61

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Alunogen

Al2(SO4)3·17H2O

triklin : 1 : P1

7.CB.45

'Meta-alunogen'

Al4(SO4)6·27H2O

7.CB.45

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Rhomboclase

(H5O2)+Fe3+(SO4)2·2H2O

orthorhombisch : mmm : Pnma

VI/C.08-010

Lausenite

Fe23+(SO4)3·6H2O

monoklin : 2/m : P21/m

VI/C.08-020

Kornelite

Fe23+(SO4)3·7H2O

monoklin : 2/m : P21/n

VI/C.08-030

Aluminocoquimbite

Al2Fe2(SO4)6(H2O)12·6H2O

trigonal : 3m : P31c

VI/C.08-035

Coquimbite

AlFe3(SO4)6(H2O)12·6H2O

trigonal : 3m : P31c

VI/C.08-040

Paracoquimbite

Fe4(SO4)6(H2O)12·6H2O

trigonal : 3 : R3

VI/C.08-050

Quenstedtite

Fe23+(SO4)3·10 H2O

triklin : 1 : P1

VI/C.08-060

Alunogen

Al2(SO4)3·17H2O

triklin : 1 : P1

VI/C.08-070

'Meta-alunogen'

Al4(SO4)6·27H2O

VI/C.08-080

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