Monohydrocalcite Ca(CO3 )·H2 O IMA symbol: Mhcal grandfathered
Monohydrocalcite is a carbonate or nitrate mineral with the formula Ca(CO3)·H2O, crystallizing in the trigonal system. It has a calculated density of 2.419 g/cm3.
Crystallography Crystal system trigonal crystal systemWikidata (CC0) Space group P 31 Cell (Å, °) a = 10.5547, b = 10.5547, c = 7.5644; α = 90, β = 90, γ = 120 Cell volume 729.788 ų, Z = 9 Axial ratios 1.0000:1:0.7167calculated from COD 9010479 Source structure COD 9010479 (American Mineralogist, 2008) — 1 of 3 structures
Powder X-ray diffraction (calculated) 2θ (degrees, Cu Kα1) I/I₀ (max 100) d (Å) 4.328 3.074 1.929 2.164 2.826 2.373 I/I₀ 100 82.3 71.1 62.1 51 35.8
xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9010479; idealized occupancies, no preferred orientation.
Physical properties Density (calculated) 2.419 g/cm³calculated from COD 9010479
Chemistry (calculated) Molecular weight 118.1 g/molcalculated from the IMA formula Composition (wt%) Ca 33.94%, C 10.17%, O 54.19%, H 1.71%
Classification Nickel-Strunz (10th) 5.CB.20Wikidata (CC0) Nickel-Strunz (9th) 5.CB.20Wikidata (CC0)
