Sulfate Minerals: A Bond-Valence Approach to the Structure, Chemistry and Occurrence of Complex Oxysalt Minerals Schindler, M. ; Hawthorne, F. C. ; Huminicki, D. M. C. Abstract Publication: Eleventh Annual V. M. Goldschmidt Conference Pub Date: May 2001 Bibcode: 2001eag..conf.3039S