Kutnohorite is a rare
calcium manganese carbonate mineral with
magnesium and
iron, that is a member of the dolomite group. It forms a series with
dolomite, and with
ankerite. The
end member formula is CaMn
2+(CO
3)
2, but Mg
2+ and Fe
2+ commonly substitute for Mn
2+, with the Mn content varying from 38% to 84%, so the formula Ca(Mn
2+,Mg,Fe
2+)(CO
3)
2 better represents the species. It was named by Professor Bukowsky in 1901 after the
type locality of
Kutná Hora, Bohemia, in the Czech Republic. It was originally spelt “kutnahorite” but “kutnohorite” is the current IMA-approved spelling.