General Information:
Chemical Formula:
MnCO3
Composition:
(Molecular Weight = 114.95 gm)
Manganese 47.79 % Mn
Carbon 10.45 % C
Oxygen 41.76 % O
Empirical Formula:
Mn2+(CO3)
IMA Status:
Approved IMA 1960
Name Origin:
From the Greek rhodon -"rose" and chroma - "color."
Physical Properties:
Cleavage:
[1011] Perfect, [1011] Perfect, [1011] Perfect
Color:
pinkish red, red, rose red, yellowish gray, or brown.
Density:
3.69
Diaphaniety:
Translucent to subtranslucent
Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., Columnar - Forms columns, Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Hardness:
3 - Calcite
Luminescence:
None.
Luster:
Vitreous (Glassy)
Streak:
white
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