Mineral Factbook

Bannisterite

(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8·nH2OIMA symbol: Banapproved

Bannisterite is a silicate mineral with the formula (Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8·nH2O.

Photos

Bannisterite specimen photo
Rept0n1x · CC BY-SA 3.0 · Commons
Bannisterite specimen photo
Rock Currier · CC BY 3.0 · Commons
Bannisterite specimen photo
John Sobolewski (JSS) · CC BY 3.0 · Commons
Bannisterite specimen photo
John Sobolewski (JSS) · CC BY 3.0 · Commons

Crystallography

Space groupA 1 2/a 1
Cell (Å, °)a = 22.265, b = 16.368, c = 24.668; α = 90, β = 94.285, γ = 90
Cell volume8964.72 ų, Z = 4
Source structureCOD 9009232 (Clays and Clay Minerals, 1992) — 1 of 2 structures

Physical properties

Classification

Nickel-Strunz (10th)9.EG.75Wikidata (CC0)
Nickel-Strunz (9th)9.EG.75Wikidata (CC0)