Sanidine Ackermann S, Kunz M, Armbruster T, Schefer J, Hanni H Schweizerische Mineralogische und Petrographische Mitteilungen 84 (2004) 345-354 Cation distribution in a Fe-bearing K-feldspar from Itrongay, Madagascar: A combined neutron- and X-ray single-crystal diffraction study Note: Combined X-Ray, Neutron diffraction data, cell parameters from X-Ray data Locality: Itrongay, Madagascar _database_code_amcsd 0020557 8.5832 13.0076 7.1943 90 116.023 90 C2/m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) K1M .21471 .5 .8619 .895 .0270 .0177 .0334 .0270 0 .0070 0 Na1M .21471 .5 .8619 .105 .0270 .0177 .0334 .0270 0 .0070 0 SiT1 .99057 .18506 .77623 .65 .0107 .0114 .0118 .0092 .0022 .0047 .0011 AlT1 .99057 .18506 .77623 .33 .0107 .0114 .0118 .0092 .0022 .0047 .0011 FeT1 .99057 .18506 .77623 .02 .0107 .0114 .0118 .0092 .0022 .0047 .0011 SiT2 .20953 .38208 .34432 .88 .0105 .0110 .0093 .0107 .0002 .0042 -.0001 AlT2 .20953 .38208 .34432 .12 .0105 .0110 .0093 .0107 .0002 .0042 -.0001 O1 .1382 .5 .2850 .0207 .0206 .0136 .0205 0 .0021 0 O2 .31989 .37375 .59434 .0201 .0221 .0210 .0116 .0023 .0022 .0017 O3 0 .14652 0 .0210 .0249 .0211 .0173 0 .0093 0 O4 .03536 .31106 .2585 .0193 .0184 .0180 .0195 -.0027 .0063 -.0033 O5 .17230 .14693 .7726 .0252 .0231 .0328 .0244 .0044 .0146 -.0007