Hilairite-(Ca) Zubkova N V, Kolitsch U, Pekov I V, Turchkova A G, Vigasina M F, Pushcharovsky D Y, Tillmanns E European Journal of Mineralogy 21 (2009) 495-506 Crystal chemistry of Rb-, Sr-, Ba-, Ca- and Pb-exchanged forms of natural hilairite Locality: Kirovskii mine, Khibiny alkaline complex, Kola Peninsula, Russia Note: sample was synthesized by cation exchange at 150 C _database_code_amcsd 0007284 10.456 10.456 7.995 90 90 120 R3 atom x y z occ Uiso Ca1a 0 0 .65406 .769 .0440 Ca1b 0 0 .570 .057 .044 Zr 0 0 .05443 .01018 Si .41057 .41756 .52857 .01112 O1 .0922 .1779 .8848 .0161 O2 -.0929 -.1912 .1900 .0167 O3 .6588 .0166 .0176 .0189 Wat .0112 .2011 .5025 .0644