Rambergite
- IMA 1995-028
Rambergit is a very rarely occurring mineral from the mineral class of " sulfides and sulfosalts ." It crystallizes in the hexagonal crystal system with the chemical composition MnS is so chemically seen a manganese sulfide.
Rambergit developed only millimeter-sized, opaque crystals of hexagonal, prismatic or pyramidal habit and red-brown, dark brown to black in color.
Etymology and history
Was first found Rambergit 1996 in a mine in Garpenberg in the Swedish municipality Hedemora and described by Mariusz P. Kalinowski, named after the Swedish professor of mineralogy and petrology Hans Ramberg ( 1917-1998 ).
Classification
In the old ( 8th edition ) and new classification of minerals according to Strunz ( 9th edition ) of the Rambergit belongs to the department of " sulfides and sulfosalts with the molar ratio of metal: sulfur, selenium, tellurium = 1: 1". The 9th edition of Strunz'schen Mineral classification divided here but now more specific to the nature of the cations involved and the mineral is therefore in accordance with the subdivision " with zinc (Zn ), iron ( Fe ), copper (Cu ), silver ( Ag), etc. ", where it forms a separate group together with Cadmoselit, Greenockit, Hypercinnabarit and wurtzite.
The commonly used in English-speaking classification of minerals according to Dana assigns the Rambergit the subdivision of " sulfides including selenides and tellurides with the general composition AmBnXp and the molar ratio (m n): p = 1:1". There he finds himself together with Cadmoselit, Greenockit and wurtzite in the Wurtzitgruppe ( Hexagonal: P63mc ).
Education and Locations
Rambergit formed in an oxygen- free layers of sediment, enriched with organic material.
Apart from its type locality in Sweden Garpenberg Rambergit has so far (as of 2009) are detected in three other localities: In the Gotland Deep in the Baltic Sea; in a mine near Ronneburg ( Thuringia) in Germany as well as in the mine " Hirogawara " in Chichibu ( Honshū ) in Japan.
Crystal structure
Rambergit crystallized hexagonal space group P63mc with the lattice parameters a = 3.982 Å and c = 6.445 Å and two formula units per unit cell.