Mineral Factbook

Clinozoisite

Ca2Al3[Si2O7][SiO4]O(OH)IMA symbol: Czoapproved

Clinozoisite is a silicate mineral with the formula Ca2Al3[Si2O7][SiO4]O(OH), crystallizing in the monoclinic system. It has a Mohs hardness of 5-5.5, a calculated density of 3.387 g/cm3.

Photos

Clinozoisite specimen photo
Shannon Heinle · CC0 · Commons
Clinozoisite specimen photo
Shannon Heinle · CC0 · Commons
Clinozoisite specimen photo
Shannon Heinle · CC0 · Commons
Clinozoisite specimen photo
Zopilote0 · CC BY 2.0 · Commons

Crystallography

Crystal systemmonoclinic crystal systemWikidata (CC0)
Space groupP 1 21/m 1
Cell (Å, °)a = 8.8652, b = 5.5753, c = 10.1449; α = 90, β = 115.42, γ = 90
Cell volume452.878 ų, Z = 2
Axial ratios1.5901:1:1.8196calculated from COD 9010277
Source structureCOD 9010277 (American Mineralogist, 2007) — 1 of 18 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)2.8882.5882.7882.6793.471.394
I/I₀10035.335.225.423.923.6

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9010277; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)3.387 g/cm³calculated from COD 9010277
Hardness (Mohs)
5-5.5single sourceDana's System, 3rd Appendix (1915)

Chemistry (calculated)

Molecular weight454.36 g/molcalculated from the IMA formula
Composition (wt%)Ca 17.64%, Al 17.82%, Si 18.54%, O 45.78%, H 0.22%

Classification

Nickel-Strunz (10th)9.BG.05aWikidata (CC0)
Nickel-Strunz (9th)9.BG.05aWikidata (CC0)
Dana (8th)58.2.1a.4Wikidata (CC0)