Boromuscovite Liang J, Hawthorne F C, Novak M, Cerny P The Canadian Mineralogist 33 (1995) 859-865 Crystal-structure refinement of boromuscovite polytypes using a coupled Rietveld-static-structure energy-minimization method Sample: 2M1 polytype Locality: Recice, Czech Republic _database_code_amcsd 0005445 5.090 8.822 19.819 90 95.62 90 C2/c atom x y z occ Biso Al .25 .079 -.0002 .96 .47 SiT1 .442 .254 .1351 .78 .12 BT1 .442 .254 .1351 .22 .12 SiT2 .045 .426 .3640 .72 .17 BT2 .045 .426 .3640 .28 .17 K 0 .103 .25 .41 .26 O .039 .072 .4541 .35 O1 .385 .248 .0569 .37 O2 .043 .438 .4466 .29 O3 .419 .090 .1655 .38 O4 .229 .361 .1636 .68 O5 .270 .314 .3466 .32