Pekovite Pautov L A, Agakhanov A A, Sokolova E V, Hawthorne F C The Canadian Mineralogist 42 (2004) 107-119 Maleevite, BaB2Si2O8, and pekovite, SrB2Si2O8, new mineral species from the Dara-i-Pioz alkaline massif, Northern Tajikistan: Description and crystal structure Locality: Dara-i-Pioz alkaline massif, Northern Tajikistan _database_code_amcsd 0005929 8.155 7.919 8.921 90 90 90 Pnma atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) SrA .38756 1/4 .07841 .00898 .0129 .0037 .0103 0 -.0005 0 BT1 .2650 .0808 .4153 .0049 .0083 .0000 .0063 -.0007 .0007 -.0006 SiT2 .06105 .94094 .19163 .0050 .0082 .0006 .0061 -.0002 -.0001 -.0002 O1 .2002 .9833 .0688 .0085 .0137 .0047 .0071 -.0033 .0021 -.0018 O2 .1344 .9637 .3597 .0071 .0114 .0044 .0055 -.0017 -.0012 -.0002 O3 .4103 .0725 .3207 .0075 .0113 .0007 .0106 .0015 .0033 -.0005 O4 .4924 3/4 .3277 .0077 .0127 .0001 .010 0 .0019 0 O5 .1951 1/4 .4127 .0086 .0078 .0046 .013 0 .0026 0