AM_Takeuchiite
Formula:
Mg20.58 Mn15.42 B12 O60
Name:
Takeuchiite
Unit cell:
27.585 12.561 6.027 90.0 90.0 90.0 , V=2088.33
Space group:
PNNM (58)
Norrestam R , Bovin J-O , Zeitschrift fur Kristallographie , 181 (1987) p.135-149, The crystal structure of takeuchiite, Mg1.71Mn1.29BO5:, A combined single crystal X-ray and HRTEM study, Locality: Langban mine, Sweden