Factors controlling sulfur concentrations in volcanic apatite Factors controlling sulfur concentrations in volcanic apatitev. 821210–1224Peng, G., Luhr, James F., and McGee, J. J. 1997. "Factors controlling sulfur concentrations in volcanic apatite." American Mineralogist, 82 1210–1224.More...ID: 96210Type: articleKeywords: NMNH; NH-Mineral Sciences; Annals-Import