Natroalunite Okada K, Hirabayashi J, Ossaka J Neues Jahrbuch fur Mineralogie, Monatshefte 1982 (1982) 534-540 Crystal structure of natroalunite and crystal chemistry of the alunite group Locality: Sonomi-dake, Makurazaki-city, Kagoshima Prefecture, Japan _database_code_amcsd 0014771 6.990 6.990 16.905 90 90 120 R-3m atom x y z occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Na 0 0 0 .58 1.90 .0270 .0270 .0182 .0135 0 0 K 0 0 0 .42 1.90 .0270 .0270 .0182 .0135 0 0 Al 0 .5 .5 .52 .0039 .0047 .0108 .0020 .0000 0 S 0 0 .30590 .51 .0055 .0055 .0081 .0028 0 0 O1 0 0 .39211 .76 .0106 .0106 .0077 .0053 0 0 O2 .21805 -.21805 -.05729 .75 .0101 .0101 .0109 .0072 -.0004 .0004 Oh .12534 -.12534 .13902 .74 .0054 .0054 .0164 .0021 .0016 -.0016 H .178 -.178 .116 3.1