A typical rossmanite composition is
X(0.51Na0.49Ca0.00) Y(Li1.19Al1.81) ZAl6.00 (BO3.00)3.00 (Si5.89Al0.11)O18.00 [(OH)3.71F0.29]
Breaks, F.W., Tindle, A.G., and Selway, J.B. (2008) Electron microprobe and bulk rock and mineral compositions from rare-element pegmatites and peraluminous, S-type granitic rocks from the Fort Hope pegmatite field, north-central Superior Province of Ontario. Ontario Geological Survey, Miscellaneous Release Data, 235.
last upgraded: 9-Dec-2015