- Manganoan Calcite
Manganoan Calcite or Manganocalcite is a variety of
calcite rich inmanganese , which gives the mineral a pink color. Its chemical composition is (Ca,Mn)CO3 . It was first reported from theBanská Štiavnica Mining District,Slovak Republic , but is widely distributed around the world, notably atNaica ,Mexico in theCave of Swords .Manganoan calcite is sometimes confused with
rhodochrosite . The amount of manganese in manganocalcite varies at different localities, and in fact the mineral forms asolid solution series between calcite and rhodochrosite, with the color becoming redder with a higher proportion of manganese [Rhodochrosite ] .References
* [http://www.mindat.org/min-2526.html Manganoan Calcite] at Mindata
External links
* [http://www.museums.udel.edu/mineral/mineral_site/displaycollection/Carbonates/Calcite/9999-0800-2679.html Photo of Manganoan Calcite] at
University of Delaware * [http://www.mindat.org/gallery.php?min=2526 Manganoan Calcite Gallery]
Wikimedia Foundation. 2010.