Mineral Factbook

Kutnohorite

CaMn2+(CO3)2IMA symbol: Kutgrandfathered

Kutnohorite is a carbonate or nitrate mineral with the formula CaMn2+(CO3)2, crystallizing in the trigonal system. It has a calculated density of 3.181 g/cm3.

Photos

Kutnohorite specimen photo
Didier Descouens · CC BY-SA 3.0 · Commons
Kutnohorite specimen photo
Robert M. Lavinsky · CC BY-SA 3.0 · Commons
Kutnohorite specimen photo
Robert M. Lavinsky · CC BY-SA 3.0 · Commons
Kutnohorite specimen photo
Robert M. Lavinsky · CC BY-SA 3.0 · Commons

Crystallography

Crystal systemtrigonal crystal systemWikidata (CC0)
Space groupR -3 :H
Cell (Å, °)a = 4.8732, b = 4.8732, c = 16.349; α = 90, β = 90, γ = 120
Cell volume336.241 ų, Z = 6
Axial ratios1.0000:1:3.3549calculated from COD 9001047
Source structureCOD 9001047 (American Mineralogist, 1987) — 1 of 3 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)2.9361.8161.8392.2242.0433.75
I/I₀10026.22119.217.817.7

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9001047; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)3.181 g/cm³calculated from COD 9001047

Classification

Nickel-Strunz (10th)5.AB.10Wikidata (CC0)
Nickel-Strunz (9th)5.AB.10Wikidata (CC0)