[log in to unmask]" type="cite">Shock! Horror! 19th century mineralogist had a sense of humour! So its not just the ability to do optics that is being lost these days? Bruce Professor Bruce Yardley School of Earth and Environment University of Leeds Leeds LS2 9JT UK Tel. +44 (0)113 343 5227 ________________________________ From: Metamorphic Studies Group [[log in to unmask]] On Behalf Of Treiman, Allan [[log in to unmask]] Sent: 12 February 2010 19:27 To: [log in to unmask] Subject: Re: IMA mineral nomenclature I know nothing of Charles Palache. But it seems inconceivable that a mineral with crossed extinction (a property that would have been far more familiar then than it is now) could be named for Whitman Cross by accident. Allan Treiman Allan H. Treiman Associate Director for Science Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 281-486-2117 On 2/12/10 1:05 PM, "Robert Tracy" <[log in to unmask]> wrote: Kees, According to both Mindat and Webmineral, this is indeed the case: Charles Palache of Harvard named the sodic amphibole mineral after Whitman Cross of the USGS in 1894, and Whitman Cross is among J.P. Iddings, Louis V. Pirsson and Harry Washington as originators of the CIPW norm calculation. Bob T. Linthout wrote: 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
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