Breunnerite, also known as brown spar礦物學名詞: (俄英中对照試用本) Mineralogical Terminology (Russian-English-Chinese version). — Beijing: 中國科学院. 編譯出版委員会 Compilation and Publication Committee of Chinese Academy of Sciences, 1956. — 279 p. () is a variety of magnesite, with a magnesium/iron ratio of 90/10 to 70/30.
Name and history It has been described by Wilhelm Karl Ritter von Haidinger in samples of Pfitsch pass, Zamsergrund and , two cities of the Ziller Valley, Tyrol, Austria.
Haidinger named the new variety of the magnesite in honor of Count Breunner, August Graf in Mineralienatlas-Fossilienatlas. (sometimes the family name is written as Breuner; 1796-1877), a famous collector of minerals and fossils, as well as a high-ranking government official of Austria-Hungary.
In 19th-century mineralogy, as well as in mining and among geologists, breunnerite and its close analogues from the isomorphic series magnesite → siderite were more often known under the capacious morphological name ″brown spar″.Bulletin of the United States National Museum. No.30. Published under the Directions of the Smithsonian Institution. — Washington: Government Printing Office, 1885.
Application Breunerite is widely used in firing during the formation of raw materials for the subsequent production of refractories. When magnesium carbonate, which is part of breunerite, is brought to a temperature of about 600°C, it enters the firing process as a mineralizer, first decomposing and then reacting and forming two main compounds that act as raw materials: 2CaFe2O3 и MgOFe2O3. Breunerite produces a less pure product than a mixture of magnesia and iron oxide, but is more economical to produce.
References
External links
Breunnerite, a variety of Magnesite: information about the mineral breunnerite in the database Mindat. Breunnerite in database Mineralienatlas Breunnerite: Sevastopol stone museum.