Hauerite

Hauerite is a rarely occurring mineral from the mineral class of " sulfides and sulfosalts ". It crystallizes in the cubic crystal system with the chemical composition and mNS2 developed mainly isometric, octahedral crystals, but other combinations of cubic and spherical mineral aggregates from brownish red to brownish-black color. The mineral is opaque in thin layers but translucent. The crystal surfaces show fresh first metal to diamond gloss, however, run slowly by weathering and are dull.

Special Features

Hauerite is soluble in hydrochloric acid, forming hydrogen sulfide.

Etymology and history

Was first found Hauerite 1846 in the Slovak community Vígľašská Huta - Kalinka ( Okres garb) and described by Wilhelm Ritter von Haidinger, which it in honor of the Austrian geologist Joseph Ritter von Hauer ( 1778-1863 ) and his son Franz Ritter von Hauer ( 1822-1899) after those named.

Classification

In the 8th edition of the now outdated Strunz'schen Mineral classification of Hauerite still belongs to the department of " sulfides with the molar ratio of metal: sulfur, selenium, tellurium < 1:1". With the revision of the nomenclature in the 9th edition of the departments of the sulfides were partially re-defined and precisely divided by the concerned link partners and the mineral was prepared according to the department of " metal sulfides with the molar ratio M: S ≥ 1: 2" and there in the subsection "M: S = 1: 2, with iron ( Fe), Co ( cobalt ), Ni ( lid ), PGE, etc. ' are added.

The commonly used in English-speaking classification of minerals according to Dana assigns the Hauerite in the department of " sulfides including selenides and tellurides with the general composition AmBnXp, with (m n): p = 1:2 " and there in the pyrite group ( Isometric: Pa3 ).

Education and Locations

Hauerite formed by sedimentation in sulfur-rich clay mineral deposits and is found mostly in paragenesis with native sulfur, gypsum, Rambergit, realgar and calcite.

Worldwide, Hauerite so far (as of 2009) are detected in 25 localities, including, inter alia in the Chinese province of Hunan; at Ronneburg ( Thuringia) in Germany; at Raddusa in Italy; on Honshu in Japan; at Olkusz and Tarnobrzeg in Poland; in addition to its type locality Vígľašská Huta - Kalinka still in Banská Štiavnica in Slovakia; and some regions of the U.S. states of Louisiana and Texas.

Crystal structure

Hauerite crystallizes isotypic with pyrite in the cubic crystal system in the space group with the lattice parameters a = 6.097 Å and four formula units per unit cell.