Wilancookite
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| Wilancookite | |
|---|---|
 Wilancookite from Ponte do Piauí claim, Piauí valley, Taquaral, Itinga, Jequitinhonha valley, Minas Gerais, Brazil | |
| General | |
| Category | Phosphate |
| Formula | (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] |
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]
