Samarskite-(Y)

Specimen ID: 67X-H4E

Mineral(s)
Samarskite-(Y) : YFe3+Nb2O8
Locality
As recorded:
Spinelli prospect, Glastonbury, Hartford County, Connecticut, USA
Mindat locality:
Dimensions
25mm x 23mm x 15mm
Collections
Collected by:
Events

Photo added to mindat.org

Samarskite-(Y) crystal (14 by 20 by 6 mm) protruding from a mass of samarskite-(Y) (overall dimensions 25 by 23 by 15 mm). The crystal shows a yellow alteration product and some of the brick-red feldspar in which it was embedded. I removed this the "old fashioned" way with hammer and chisel. Every analysis I have examined (both published and private) where the source of the material is not in question and the data are available for study, clearly indicates samarskite-(Y) and excludes ishikawaite. The first analysis was by Roger C. Wells, Chief Chemist at the U.S. Geological Survey, who published his data in USGS Bulletin 878, 1937. The most recent analysis was by Hanson, Jarnot, Falster, Simmons and Nizamoff, "Nb-Ta-Ti Minerals from Two Pegmatites of the Middletown Area, Connecticut," 2003, presented at the Rochester Mineralogical Symposium. Note: Private property; specimens collected with permission) Field collected by, photographed by, and in the collection of Fred E Davis, 2008.
Fred E. Davis - 26th April 2009
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