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Achalaite

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Collectors Summary

Crystal System

monoklin, C2/c

Chemism

Chemical formula

(Fe²⁺,Mn)(Ti,Fe³⁺,Ta)(Nb,Ta)₂O₈

Chemical composition

Eisen, Mangan, Niob, Tantal, Titan, Sauerstoff

Unit weight: 477.015991475 u; Number of atoms in the formula: 12

Info

Empirical formula:

(Fe_0.75Mn_0.25)(Ti_0.6Fe_0.3Ta_0.1)(Nb_0.75Ta_0.25)₂O₈

Element	Symbol	Weight%	Atoms	Atoms%	Atom weight (u)	Sum weight (u)
Oxygen	O	26.83	8	66.67	15.9994300	127.9954400
Titanium	Ti	6.02	0.6	5.00	47.8671000	28.7202600
Manganese	Mn	2.88	0.25	2.08	54.9380499	13.7345125
Iron	Fe	12.29	1.05	8.75	55.8452000	58.6374600
Niobium	Nb	29.21	1.5	12.50	92.9063820	139.3595730
Tantalum	Ta	22.76	0.6	5.00	180.9479100	108.5687460

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IMA status

anerkannt - CNMNC Newsletter No. 19, February 2014

Mineral status

anerkanntes Mineral

IMA Classification

Wodginite group

Crystallography

Crystal System	monoklin
Class (H-M)	2/m
Space Group number	15
Space Group	C2/c
Cell parameters a (Å)	9.422(4)
Cell parameters b (Å)	11.427(3)
Cell parameters c (Å)	5.120
Cell parameters a/b or c/a	0.825
Cell parameters c/b	0.448
Cell parameters α	90°
Cell parameters β	90.12(4)º
Cell parameters γ	90°
Volumne (Å³)	551.245
X-Ray Powder Diffraction	3.630(40), 2.964(100), 2.564(35), 2.493(40), 1.766(35), 1.735(40), 1.711(50), 1.453(40)
	Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

(Co-)Type locality

(Co-)Type locality	Argentinien /Córdoba, Provinz /Cañada del Puerto /Cerro Los Mogotes
Type material	Museo de Mineralogiá y Geologiá ‘‘Dr. Alfred Stelzner’’, Universidad Nacional de Córdoba, Córdoba, Argentinien
Collection number of type material	3279

Preface

Author (Name, Year)

Miguel á ngel Galliski, Mariá Florencia Márquez-Zavaliá, Petr Černý, Rau´l Lira, Andrew C. Roberts und Heinz-Jürgen Bernhardt (2013)

References

Galliski, M.á ., Márquez-Zavaliá, M.F., Černý, P., Lira, R., Roberts, A.C. and Bernhardt, H.-J. (2014) Achalaite, IMA 2013-103. CNMNC Newsletter No. 19, February 2014, page 166; Mineralogical Magazine, 78, 165-170.

IMA group assignments

Other languages

German	Achalait
English	Achalaite
Russian	Ачалаит

IMA Number

IMA 2013-103

Automatic Links to external internet sources (Responsibility is with the operator)

German pages	DeWikiPedia - search for: Achalait Google-Bilder-Suche - search for: Achalait Mineralogisch-Petrographisches-Institut Hamburg - search for: Achalait
English pages	Mindat - search for: Achalaite Webmineral - search for:Achalaite Handbook-of-Mineralogy - search for: Achalaite RRUFF - Raman, XRD and other mineral data - search for: Achalaite RRUFF - References and PDF downloads - search for: Achalaite American-Mineralogist-Crystal-Structure-Database - search for: Achalaite Athena - search for: Achalaite
Russian pages	Webmineral.ru - search for: Ачалаит

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German pages

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