Yes, it is also often reffered to as 'sulphospurrite' which is rather imprecise. It
forms extensive solid solution with silicocarnotite and also with the apatite-
ellestadite series.
See Pliego-Cuervo, Y. and Glasser, F. P. (1978): "Phase relations and crystal
chemistry of apatite and silicocarn
In the study of non-expansive, fast-setting calcium-sulfo-aluminate based
clinker materials, has anybody come across a fluorine bearing phase which is
vaguely described as 'calcium-fluoride-silicate-sulfate'? It supposedly forms
at certain burn conditions in production kilns.
L. Keller
