This arrangement of mineral species is based on Dana's New Mineralogy by Richard V. Gaines, H. Catherine Skinner, Eugene E. Foord, Brian Mason, and Abraham Rosenzweig, with sections by Vandall T. King, Illustrations by Eric Dowty, (ISBN: 047119310-0) Copyright © 1997, John Wiley & Sons, Inc.". This material is used by permission of John Wiley & Sons, Inc. Follow this link for a short discussion on the Dana Classification Number.
03.06.20 Fuloppite Group (Monoclinc: C2/c containing Pb, Sb) 03.06.20.01 Fuloppite Pb3Sb8S15 C 2/c 2/m 03.06.20.02 Plagionite Pb5Sb8S17 C 2/c 2/m 03.06.20.03 Heteromorphite Pb7Sb8S19 C 2/c 2/m 03.06.20.04 Semseyite Pb9Sb8S21 C 2/c 2/m 03.06.20.05 Rayite (Ag,Tl)2Pb8Sb8S21 C 2/c 2/m