Wilancookite
Wilancookite is a very rare and complex beryllium phosphate with the 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.[1][2]
| 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 |
| Crystal system | Isometric |
| Crystal class | Tetartoidal (23) H-M symbol: (23) |
| Space group | I23 |
| Unit cell | a = 13.54 Å (approximated) |
| Identification | |
| References | [1] |
Relation to other minerals
Wilancookite is related to pahasapaite,[1] a lithium-bearing beryllium phosphate mineral.[3]
References
- 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.
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