Permingeatite

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Permingeatite
General and classification
other names

IMA 1971-003

chemical formula Cu 3 SbSe 4
Mineral class
(and possibly department) 		Sulfides and sulfosalts
System no. to Strunz
and to Dana 		2.KA.10 ( 8th edition : II / C.06)
02/03/02/03
Crystallographic Data
Crystal system tetragonal
Crystal class ; symbol tetragonal-scalenohedral; 4 2 m
Room group (no.) I 4 2 m (No. 121)
Lattice parameters a  = 5.63  Å ; c  = 11.23 Å
Formula units Z  = 2
Physical Properties
Mohs hardness 4 to 4.5
Density (g / cm 3 ) calculated: 5.82
Cleavage Please complete!
colour light brownish pink
Line color Please complete!
transparency opaque
shine Metallic luster
Other properties
Special features Thermoelectricity

Permingeatite is a very rarely occurring mineral from the mineral class of " sulfides and sulfosalts ". It crystallizes in the tetragonal crystal system with the chemical composition Cu 3 SbSe 4 and so far could only be found in the form of microscopic grains and inclusions in Hakit .

Permingeatite is opaque in every form and shows a light brownish pink color on polished surfaces.

Special properties

Permingeatite is thermoelectric .

Etymology and history

The Permingeatit was first discovered in a carbonate - transition at Předbořice ( Předbořice ) near Kutná Hora in Central Bohemia , Czech Republic. The mineral was described in 1971 by Z. Johan, P. Picot, R. Pierrot and M. Kvaček, who named it after the French mineralogist François Permingeat (1917–1988).

Type material of the mineral has been deposited in the Charles University in Prague and the École nationale supérieure des mines de Paris .

classification

In the now outdated, but still in use 8th edition of the mineral classification according to Strunz , the permingeatite belonged to the mineral class of "sulfides and sulfosalts" and there to the department of "sulfides with a molar ratio of metal: sulfur, selenium, tellurium = 1: 1", where he together with Barquillit , Černýit , Famatinit , Ferrokësterit , Hocartit , Kësterit , Kuramit , Luzonit , Briartit , Petrukit , Pirquitasit , Rhodostannit , Sakuraiit , Stannit , Toyohait and Velikit the "Stannit-Gruppe" with the system no. II / C.06 formed.

The 9th edition of Strunz's mineral systematics , which has been in effect since 2001 and is used by the International Mineralogical Association (IMA), also assigns permingeatite to the class of “sulfides and sulfosalts”, although there it belongs to the “sulfarsenates” category. This division is also further subdivided according to the crystal structure, so that the mineral can be found according to its structure in the subdivision of "Sulpharsenates with (As, Sb) S 4 tetrahedra", where it can be found together with barquillite, briartite, famatinite and luzonite "Luzonit Group" with the system no. 2.KA.10 forms.

The systematics of minerals according to Dana , which is mainly used in the English-speaking world , assigns permingeatite to the class of "sulphides and sulphosalts" and there in the category of "sulphide minerals". Here he is together with Famatinit and Luzonit in the "Luzonitgruppe" with the system no. 02/03/02 within the sub-section " Sulphosalts with the ratio z / y = 4 and the composition (A + ) i (A 2+ ) j [B y C z ], A = metals, B = semi-metals, C = non-metals " Find.

Education and Locations

Permingeatite forms hydrothermally in low-grade ( epithermal ) dykes. As Begleitminerale occur among other Berzelianit , calcite , chalcopyrite , Clausthalit , Eskebornite , goethite dignified, gold , Ferroselit , Hakit , hematite , Klockmannit , Naumannite , pyrite , tetrahedrite , Umangite and uraninite on.

Apart from its type locality Předbořice in Bohemia, only Petrovice near Nové Město na Moravě and the "Bukov Mine" near Rožná in Moravia are known as sites for permingeatite (as of 2012) .

Crystal structure

Permingeatite crystallizes tetragonally in space group I 4 2 m (space group no. 121) with the lattice parameters a  = 5.63  Å and c  = 11.23 Å ​​as well as 2 formula units per unit cell .

See also

literature

Web links

Individual evidence

  1. ↑ a b c d e Hugo Strunz , Ernest H. Nickel: Strunz Mineralogical Tables . 9th edition. E. Schweizerbart'sche Verlagbuchhandlung (Nägele and Obermiller), Stuttgart 2001, ISBN 3-510-65188-X , p.  79 .
  2. ↑ Webmineral - Permingeatite
  3. ↑ a b c John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, Monte C. Nichols: Permingeatite. In: Handbook of Mineralogy, Mineralogical Society of America. 2001 ( PDF 61.1 kB )
  4. ^ Friedrich Klockmann : Klockmanns textbook of mineralogy . Ed .: Paul Ramdohr , Hugo Strunz . 16th edition. Enke , Stuttgart 1978, ISBN 3-432-82986-8 , pp.  433 (first edition: 1891).
  5. ↑ Mineralienatlas - Předbořice, description of the type locality Předbořice
  6. ↑ Mindat - Permingeatite