Hilairite-(Sr) 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 0007282 20.964 20.964 7.836 90 90 120 R3 atom x y z occ Uiso Sr1a .7976 .6512 .2809 .331 .042 Sr1b .8229 .6342 .1516 .393 .063 Sr1c .8672 .6894 .1497 .299 .0345 Sr2 .3482 .6455 .2819 .330 .0410 Zr1 0 0 .05775 .0155 Zr2 .50235 .49769 .04918 .0175 Si1 .6711 .6300 -.0898 .0482 Si2 .5401 .3658 .1876 .0260 Si3 .3295 .4565 .1786 .0413 Si4 .3848 .5432 -.1484 .0188 O1 .5987 .5565 -.091 .045 O2 .5396 .5821 .215 .032 O3 .6826 .6689 .102 .065 O4 .6101 .3629 .209 .039 O5 .3426 .5142 .3396 .060 O6 .5496 .4497 .1925 .021 O7 .4800 .3112 .331 .043 O8 .2533 .3865 .193 .041 O9 .3254 .4963 -.008 .044 O10 .4035 .4451 .1740 .029 O11 .4592 .5475 -.120 .056 O12 .3921 .6256 -.155 .038 Wat1 .832 .7748 .227 .64 .074 Wat2 .6872 .5256 .241 .33 .027 Wat3 .4220 .6655 .178 .73 .076 Wat4 .915 .673 .161 .50 .066