AM_Mattheddleite
Formula:
Pb5 (Si1.5 S1.5) O12.43 (Cl.57 H.43)
Name:
Mattheddleite
Unit cell:
10.0056 10.0056 7.496 90.0 90.0 120.0 , V=649.90
Space group:
P63/M (176)
Steele I M , Pluth J J , Livingstone A , Mineralogical Magazine , 64 (2000) p.915-921, Crystal structure of mattheddleite: a Pb, S, Si phase with the apatite structure, Locality: Leadhills, Scotland