Crandallite gallery

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CRANDALLITE Charles Davis Mine, N. Groton, NH 1.6 mm field of view	Species: CRANDALLITE Locality: Charles Davis Mine, N. Groton, NH Specimen Size: 1.6 mm field of view Field Collected: Gene Bearss- 1991 Catalog No.: A Bob Wilken specimen - gift from Gene Bearss Notes: Gene Bearss had a similar (concurrently collected) Charles Davis crandallite analyzed by Dr. Eugene Foord of the USGS. This analysis confirmed crandallite. [tm] Gene Bearss gave me a specimen from this find - 2014. These crandallites are very difficult to photograph. I could not improve on Bob Wilken's photos.
CRANDALLITE - ? Charles Davis Mine, N. Groton, NH 0.4 mm field of view	Species: CRANDALLITE - ? Locality: Charles Davis Mine, N. Groton, NH Specimen Size: 0.4 mm field of view Field Collected: Bob Wilken Catalog No.: A Bob Wilken specimen Notes: A Bob Wilken tentative ID
CRANDALLITE Palermo Mine, N. Groton, NH 0.5 mm crandallite ball CRANDALLITE Palermo Mine, N. Groton, NH 0.5 mm white crandallite balls	Species: CRANDALLITE Locality: Palermo Mine, N. Groton, NH Specimen Size: 0.5 mm crandallite ball. Second photo shows two on specimen. Field Collected: Forrest Fogg Catalog No.: Bob Wilken specimen and photos Notes: A semi-quantative polished grain EDS analysis of sample from this specimen indicated a chemistry: CaBa_0.1Al_4.1P_2.9O₁₀ (normalized for one Ca and rounded to nearest 0.1 APFU.) Crandallite chemistry is: CaAl₃(PO₄)(PO₃OH)(OH)₆ Note, EDS cannot detect H. Crandallite is the closest fit available for the EDS indicated chemistry, but still not a particularly good match. Dana's System of Mineralogy indicates "Ba, Sr and rare earths may substitute for Ca" in crandallite.
CRANDALLITE Palermo Mine, Groton, NH Field of view about 1 mm	Species: CRANDALLITE Locality: Palermo Mine, Groton, NH Specimen Size: Field of view about 1 mm Field Collected: Forrest Fogg Catalog No.: u2604 Notes: Forrest labeled these hairs as crandallite.
CRANDALLITE Charles Davis Mine, Groton, NH 0.7 mm crystal	Species: CRANDALLITE Locality: Charles Davis Mine, Groton, NH Specimen Size: 0.7 mm crystal Field Collected: Bob Janules Catalog No.: u2677 Notes: This is the only isolated crystal on this 1.3 cm specimen. Other cluster groups are present. An EDS analyses by Gene Foord of the USGS in 1992 of a Gene Bearss Charles Davis crandallite supported this identification. In the letter accompanying the plot, Gene Foord said "The chemistry says crandallite and the x-ray diffraction pattern says crandallite. So we now have crandallite from the Charles Davis mine at Groton, NH." The letter also states that the new USGS detector "can now pick up elements as light as carbon... the carbon in the plot is from the carbon coat put on for conductivity." A note at the EDS plot bottom says "Crandallite coated with SiO₂ ? There is some consideration that this may be goyazite. Quantitative EDS needed.
CRANDALLITE Charles Davis Mine, Groton, NH 1.7 mm field of view	Species: CRANDALLITE Locality: Charles Davis Mine, Groton, NH Specimen Size: 1.7 mm field of view Field Collected: Bob Wilken Catalog No.: A Bob Wilken photo & specimen Notes:
CRANDALLITE Charles Davis Mine, Groton, NH 1.4 mm field of view	Species: CRANDALLITE Locality: Charles Davis Mine, Groton, NH Specimen Size: 1.4 mm field of view Field Collected: Bob Wilken Catalog No.: A Bob Wilken photo & specimen Notes:
CRANDALLITE Charles Davis Mine, Groton, NH 0.24 mm crandallite crystal	Species: CRANDALLITE Locality: Charles Davis Mine, Groton, NH Specimen Size: 0.24 mm crandallite crystal Field Collected: Bob Wilken Catalog No.: A Bob Wilken photo & specimen Notes:
CRANDALLITE Charles Davis Mine, Groton, NH 0.43 mm compound crandallite crystal	Species: CRANDALLITE Locality: Charles Davis Mine, Groton, NH Specimen Size: 0.43 mm compound crandallite crystal Field Collected: Bob Wilken Catalog No.: A Bob Wilken photo & specimen Notes: