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Barstowite 
Summary
Barstowite, formula Pb4[Cl6|CO3]•H2O, is a transparent to white mineral in the monoclinic system.[2] It has a Mohs hardness of 3, a white streak and an adamantine lustre.[2]
| Barstowite | |
|---|---|
 Barstowite from Passa Limani area, Lavrion District, Attiki Prefecture, Greece | |
| General | |
| Category | Halide minerals |
| Formula (repeating unit) | Pb4[Cl6|CO3]•H2O |
| IMA symbol | Bsw[1] |
| Strunz classification | 3.DC.95 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | P21/m |
| Identification | |
| Color | White to transparent |
| Mohs scale hardness | 3 |
| Luster | Adamantine |
| Streak | White |
The type locality for Barstowite is Bounds Cliff, St Endellion, Cornwall in the United Kingdom.[2] It is named after Richard W. Barstow[2] (1947–1982), a Cornish mineral collector.[3]
References edit
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b c d Barstowite at Mindat.org mineralogical website
- ^ "Mineralogical Record article on Richard Barstow". Archived from the original on 21 September 2008. Retrieved 5 January 2008.
