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Wilancookite 
Summary
Wilancookite is a very rare and complex beryllium phosphate with the chemical formula (Ba,K,Na)8(Ba,Li,[ ])6Be24P24O96·32H2O. Wilancookite was discovered in pegmatite of the Lavra Ponte do Piauí complex, Jequitinhonha, Minas Gerais, Brazil.[2][3]
| Wilancookite | |
|---|---|
 Wilancookite from Ponte do Piauí claim, Piauí valley, Taquaral, Itinga, Jequitinhonha valley, Minas Gerais, Brazil | |
| General | |
| Category | Phosphate |
| Formula (repeating unit) | (Ba,K,Na)8(Ba,Li,[ ])6Be24P24O96·32H2O |
| IMA symbol | Wck[1] |
| Crystal system | Isometric |
| Crystal class | Tetartoidal (23) H-M symbol: (23) |
| Space group | I23 |
| Unit cell | a = 13.54 Å (approximated) |
| Identification | |
| References | [2] |
Relation to other minerals edit
Wilancookite is related to pahasapaite,[2] a lithium-bearing beryllium phosphate mineral.[4]
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 Menezes Filho, L.A.D., Hatert, F., Philippo, S., Ottolini, L., Dal Bo, F., Scholz, R., Chaves, M.L.S.C., Yang, H., and Downs, R.T., 2015. Wilancookite, IMA 2015-034. CNMNC Newsletter No. 27, October 2015, 1228; Mineralogical Magazine 79, 1229–1236
- ^ "Wilancookite: Wilancookite mineral information and data". Mindat.org. Retrieved 2016-03-13.
- ^ "Pahasapaite: Pahasapaite mineral information and data". Mindat.org. Retrieved 2016-03-13.