NAME ORIGIN: Named for George M. Sheldrick, creator of the SHELX software, widely used for the refinement of crystal structures.
Sherwoodite Ca9Al2V++++4V+++++24O80 Valid Species (Pre-IMA) 1958
NAME ORIGIN: Named for Alexander M. Sherwood (1888-?), American analytical chemist, U.S. Geological Survey.
Shibkovite K(Ca,Mn,Na)2(K2-x,[ ]x)2ZnSi12O30 (x~0.8) Approved IMA 1998 (Dana # Added)
NAME ORIGIN: Named after two prominent Russian geologists, Viktor Sergeevitch Shibkov (1926-1992) and Nikolai Viktorovitch Shibkov (1951-1991), who both spent their professional lives working on the geology of Soviet Asia.
NAME ORIGIN: Named for Silvia Hillebrand, daughter of G. Tschermak, was first suggested in 1914 for the then-hypothetical SO4 analog of meionite.
Simferite Li(Mg,Fe+++,Mn+++)2(PO4)2 Approved IMA 1999
NAME ORIGIN: Name is derived from the Greek for "hospitable," in allusion to the fact that four (non-P) cations enter its structure.
Simmonsite Na2LiAlF6 Approved IMA 1998 (Dana # Added)
NAME ORIGIN: Named after William B. "Skip" Simmons (b. 1943), University of New Orleans, New Orleans, Louisiana, U.S.A., specialist in the mineralogy and petrology of granitic pegmatites, especially those of Colorado and of NYF type.