Jakobssonite
Balic-Zunic T, Garavelli A, Mitolo D, Acquafredda P, Leonardsen E
Mineralogical Magazine 76 (2012) 751-760
Jakobssonite, CaAlF5, a new mineral from fumaroles at the Eldfell and Hekla
volcanoes, Iceland
Locality: Hekla volcano, Iceland
_database_code_amcsd 0019194
8.601 6.2903 7.2190 90 114.61 90 C2/c
atom    x    y    z occ Biso
Ca      0 .544  .25 .66  .55
Al      0    0    0       .5
F1      0 .950  .25      1.1
F2   .034 .720 .988        1
F3   .770 .968 .870      1.3