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and it also has a very unusual crossed axial plane, see Troeger. Two good reasons. eric On Feb 12, 2010, at 1:55 PM, Mogk, David wrote: > All, Kees appears to be correct, that crossite is named for Charles > Whitman Cross: Source Mindat.org > http://www.mindat.org/min-1160.html > > Name: > > Named in 1894 by Charles Palache for Charles Whitman Cross > [September 1, 1854 Southampton nearAmherst, Massachusetts - April > 20, 1949 Chevy Chase, Maryland]. Cross was a petrologist in the > United States geological Survey and was widely regarded as the > greatest field petrologist of his generation. He was important in > classifying igneous rocks, etc > > However (even if incorrectly ascribed in my previous note, as I had > recalled from other sources), the optical orientation is indeed > “crossed”, as per Dave Waters’ last note, and the optical properties > defined the assignation of “crossite” v. “glaucophane”, not strictly > compositional changes. > Dave Mogk > > From: Metamorphic Studies Group [mailto:[log in to unmask] > ] On Behalf Of Linthout > Sent: Friday, February 12, 2010 11:41 AM > To: [log in to unmask] > Subject: Re: IMA mineral nomenclature > > At 18:01 12/02/2010, Mogk, David wrote: > > thus the name crossite as the optic orientation has been crossed. > > What's in a name? > I always thought crossite was named was after CROSS, of the CIPW > system. > > Kees >