Anilite

Anilite
	Anilite from the Tilva-Mika deposit, Bor Mine, Bor , Bor-Majdanpek District, Serbia
General and classification
other names	Anilite; IMA 1968-030;
chemical formula	Cu 7 S 4
Mineral class; (and possibly department)	Sulphides and sulphosalts - metal sulphides, M: S> 1: 1 (mainly 2: 1)
System no. to Strunz ; and to Dana	2.BA.05f ( 8th edition : II / B.01) ; 04/02/07/05
Similar minerals	Djurleit
Crystallographic Data
Crystal system	orthorhombic
Crystal class ; symbol	orthorhombic-dipyramidal; 2 / m 2 / m 2 / m
Space group	Pnma (No. 62)
Lattice parameters	a = 7.89 Å ; b = 7.84 Å; c = 11.01 Å
Formula units	Z = 4
Twinning	Often, forms pseudocubic cells
Physical Properties
Mohs hardness	3
Density (g / cm 3 )	calculated: 5.68
Cleavage	Please complete
colour	blue to gray
Line color	black
transparency	opaque
shine	Metallic luster

Anilite is a rare mineral belonging to the mineral class of sulfides and sulfosalts . It crystallizes in the orthorhombic crystal system with the chemical composition Cu ₇ S ₄ . The mineral forms prismatic or flat crystals up to 5 mm in size. Here is a crystal twinning often, it forms pseudo-cubic cells.

Etymology and history

The mineral was recognized by the International Mineralogical Association (IMA) in 1968 . The first description was published a year later in the American Mineralogist by Nosuo Morimoto, Kichiro Koto and Yoshihiko Shimazaki. They found the mineral in the Ani Mine in Akita , Japan . In their work they described that a sample from Neudorf , Saxony-Anhalt could also be anilite, but was not recognized as an independent mineral by the descriptor H. Takeda. Other minerals could already be identified as anilite.

The type material of the mineral is stored in the National Natural Science Museum in Tokyo .

classification

Already in the outdated, but partly still in use 8th edition of the mineral classification according to Strunz , the anilite belonged to the mineral class of "sulfides and sulfosalts (sulfides, selenides, tellurides, arsenides, bismuthides)" and there to the department of "sulfides, selenides and tellurides" the molar ratio of metal: S, Se, Te> 1: 1 ", where together with Chalkosin , Digenit , Djurleit , Geerit , Roxbyit , Spionkopit and Yarrowit, it formed the group of" copper sulfides "with the system number II / B.01 .

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 the anilite to the division of "Metal sulfides with M: S / Se / Te> 1: 1 (mainly 2: 1) " a. However, this is further subdivided according to the metals involved, so that the mineral can be found according to its composition in the sub-section "with copper , silver , gold ", where it is the only member of the unnamed group 2.BA.05f .

The systematics of minerals according to Dana , which is mainly used in the English-speaking world , assigns the anilite to the class of “sulfides and sulfosalts” and there to the “sulfide minerals” section. Here he is in the " chalcosin group " with system no. 04/02/07 within the subsection "Sulphides - including selenides and tellurides - with the composition A _m B _n X _p , with (m + n): p = 2: 1".

Crystal structure

Anilite crystallizes orthorhombically in the space group Pnma (space group no. 62) with the lattice parameters a = 7.89 Å , b = 7.84 Å and c = 11.01 Å and four formula units per unit cell . Template: room group / 62

Education and Locations

The mineral forms associations with Djurleit, Covellin , Yarrowit, Spionkopit, Wittichenit , Tennantit , Chalcopyrite and Bornit .

Mineral addition to its type locality in Japan in Argentina , in the Atlantic Ocean on the mid-ocean ridges , in Austria , Australia , Brazil , Canada , Chile , China , Czech Republic , Germany , India , Indonesia , Iran , Italy , Japan , Peru , on the Philippines , Poland , Portugal , Russia , Serbia , Slovenia , Switzerland , Turkey , Great Britain and the United States of America .

literature

Nosuo Morimoto, Kichiro Koto, Yoshihiko Shimazaki: Anilite, Cu ₇ S ₄ , a new mineral In: American Mineralogist , Vol. 54, September / October 1969, pp. 1256–1268 ( PDF 779 kB , English)
Kichiro Koto, Nobuo Morimoto: The crystal structure of anilite . In: Acta Crystallographica Section B . tape 7 , no. 26 , 1970, doi : 10.1107 / S0567740870003370 .

Web links

Commons : Anilite - collection of images, videos and audio files

Individual evidence

↑ ^a ^b IMA / CNMNC List of Minerals September 2014 (English, PDF)
↑ ^a ^b ^c ^d ^e ^f Kichiro Koto, Nobuo Morimoto: The crystal structure of anilite . In: Acta Crystallographica Section B . tape 7 , no. 26 , 1970, doi : 10.1107 / S0567740870003370 .
↑ ^a ^b ^c ^d Anilite , In: John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, Monte C. Nichols (Eds.): Handbook of Mineralogy, Mineralogical Society of America , 2001 ( PDF 59.7 kB )
↑ Nosuo Morimoto, Kichiro Koto, Yoshihiko Shimazaki: Anilite, Cu ₇ S ₄ , a new mineral In: American Mineralogist , Vol. 54, September / October 1969, pp. 1256–1268 ( PDF , English)
↑ Anilite at Mindat (English)

[CNMNC-Liste-1] IMA / CNMNC List of Minerals September 2014 (English, PDF)

[Kristallstruktur-2] ↑ ^a ^b ^c ^d ^e ^f Kichiro Koto, Nobuo Morimoto: The crystal structure of anilite . In: Acta Crystallographica Section B . tape 7 , no. 26 , 1970, doi : 10.1107 / S0567740870003370 .

[Datenblatt-3] Anilite , In: John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, Monte C. Nichols (Eds.): Handbook of Mineralogy, Mineralogical Society of America , 2001 ( PDF 59.7 kB )

[Erstbeschreibung-4] Nosuo Morimoto, Kichiro Koto, Yoshihiko Shimazaki: Anilite, Cu ₇ S ₄ , a new mineral In: American Mineralogist , Vol. 54, September / October 1969, pp. 1256–1268 ( PDF , English)

[Mindat-5] Anilite at Mindat (English)