Pabst A
American Mineralogist 24 (1939) 566-576
Formula and structure of ralstonite
9.87 9.87 9.87 90 90 90 Fd3m
atom x y z occ
Na .625 .625 .625 .175
Al .125 .125 .125 .812
Mg .125 .125 .125 .188
F .190 0 0 .647
OH1 .190 0 0 .353
OH2 .5 .5 .5 .875
Effenberger H, Kluger F
Neues Jahrbuch fur Mineralogie, Monatshefte 1984 (1984) 97-108
Ralstonite: a contribution to the knowledge of composition and crystal structure
Locality: Ivigtut, Greenland
9.91 9.91 9.91 90 90 90 *Fd3m
.125 .125 .125
atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Al 0 0 0 .774 .49 .0013 .0013 .0013 -.0004 -.0004 -.0004
Mg 0 0 0 .226 .49 .0013 .0013 .0013 -.0004 -.0004 -.0004
Na .5 .5 .5 .205 2.42 .0062 .0062 .0062 -.0022 -.0022 -.0022
F .3138 .125 .125 .763 1.06 .0025 .0029 .0029 0 0 .0007
OH .3138 .125 .125 .237 1.06 .0025 .0029 .0029 0 0 .0007
Ow .375 .375 .375 .836 4.09 .0105 .0105 .0105 0 0 0
H .33 .33 .33 .418 1.00
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