page_title: Manganese(II) carbonate
section_title: Structure and production
hierarchical_section_title: Manganese(II) carbonate / Structure and production
caption_attribution_description: English: Rhodochrosite, Pyrite, Calcite (Var.: Manganoan Calcite), Quartz Locality: Wutong (Wudong) Mine, Liubao ("Babu"), Cangwu County, Wuzhou Prefecture, Guangxi Zhuang Autonomous Region, China (Locality at mindat.org) Size: 13.0 x 9.6 x 7.3 cm. This very large China rhodochrosite specimen has huge crystals to 5.25 cm, perched on contrasting matrix of quartz. The matrix also has pyrites and manganoan calcites speckled about for contrast. This is a large piece, impressive in display, and very colorful. Deutsch: Rhodochrosit, Pyrit, Calcit (Var.: Manganoan Calcit(?)), Quarz Fundort: Wutong (Wudong) Mine, Liubao ("Babu"), Cangwu County, Präfektur Wuzhou, Guangxi, China (Fundort bei mindat.org) Größe: 13.0 x 9.6 x 7.3 cm.
context_page_description: Manganese carbonate is a compound with the chemical formula MnCO₃. Manganese carbonate occurs naturally as the mineral rhodochrosite but it is typically produced industrially. It is a pale pink, water-insoluble solid. Approximately 20,000 metric tonnes were produced in 2005.
context_section_description: MnCO₃ adopts a structure like calcite, consisting of manganese(II) ions in an octahedral coordination geometry.
  Treatment of aqueous solutions of manganese(II) nitrate with ammonia and carbon dioxide leads to precipitation of this faintly pink solid.  The side product, ammonium nitrate is used as fertilizer.
caption: Pink rhodochrosite, the mineral form of MnCO3, is of practical value as well as sought by collectors.
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