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Aluminotschermakite

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Collectors Summary

Crystal System

monoklin, C2/m

Chemism

Chemical formula

☐[Ca₂][Mg₃Al₂][(OH)₂|Al₂Si₆O₂₂]

Chemical composition

Aluminium, Calcium, Magnesium, Silicium, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 815.51352681 u; Number of atoms in the formula: 42

Info

Empirical formula:

Vc[Ca₂][Mg₃Al₂][(OH)₂Al₂Si₆O₂₂]

Element	Symbol	Weight%	Atoms	Atoms%	Atom weight (u)	Sum weight (u)
Vacancy	Vc	0.00	1	2.38	0.0000000	0.0000000
Hydrogen	H	0.25	2	4.76	1.0079470	2.0158940
Oxygen	O	47.09	24	57.14	15.9994300	383.9863200
Magnesium	Mg	8.94	3	7.14	24.3050600	72.9151800
Aluminium	Al	13.23	4	9.52	26.9815382	107.9261528
Silicon	Si	20.66	6	14.29	28.0855300	168.5131800
Calcium	Ca	9.83	2	4.76	40.0784000	80.1568000

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Analysis wt%

SiO₂ : 41.04, Al₂O₃ : 16.25, Fe₂O₃ : 10.91, FeO : 7.36, MgO : 9.63, CaO : 12.77, H₂O : 2.05 (Ref: berechnet)

Strunz 9th edition incl. updates

9.DE.10

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
E: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Klinoamphibole
10:Amphibole: Ca

Lapis Classification

VIII/F.10-072

VIII: SILIKATE
F: Ketten- und Bandsilikate
10: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Ca2-Amphibole

Classification by Hölzel

9.DH.540

9: SILICATES
D: Inosilicates; ~[Si₂O₆]^4--...2-Chain
H: Amphiboles; Calcic Amphiboles
5: Tschermakite-Group

Dana 8th edition

66.01.03a.06a

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration
03a: Group 2, the calcic amphiboles

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

Amphibole supergroup ⇒ (OH,F,Cl)-dominant amphiboles ⇒ Calcium amphiboles ⇒ Tschermakite (Ts) amphiboles

Crystallography

Crystal System	monoklin
Class (H-M)	2/m
Space Group number	12
Space Group	C2/m
Cell parameters α	90°
Cell parameters γ	90°
Z	2

Preface

Author (Name, Year)

Leake, 1978

References

Canadian Mineralogist 35 (1997), 219

IMA group assignments

Other languages

German	Aluminotschermakit
Spanish	Aluminotschermakita
French	Aluminotschermakite
English	Aluminotschermakite

Alternative Name

English

Alumino-tschermakite

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