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Allanite-(Ce) from
Linkpot cut, Airline Railroad, East Hampton (Chatham), Middlesex Co., Connecticut, USA

Classification
Species:Allanite-(Ce)
Formula:{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Comments:Very sharp terminated crystals crystals, up to half an inch in diameter and five or six inches in length, accompany pink fluorite. Massive material also occurs, intergrown with quartz, bastnaesite, pyrite, chalcopyrite, and white to greenish plagioclase (commonly stained brown). The allanite is not very radioactive and was identified by an x-ray diffraction test by Mary E. Mrose of the U. S. Geological Survey. She indicated that it gave an exceptionally clear pattern. It was obviously non-metamict, in keeping with its unaltered appearance and virtual lack of radioactivity. Note: Schooner misidentified these as staurolite in Zodac (1940).
Habit:elongated prisms
Colour:black, very dark brown
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Believed Valid
References
References:Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Robinson, George W. and Vandall T. King. (1988), What's New in Minerals? Mineralogical Record: 19(5): 332.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).; Schooner, Richard. (1961): THE MINERALOGY OF CONNECTICUT.
Associated Minerals Based on Photo Data:
Bastnäsite-(Ce)1 photo of Allanite-(Ce) associated with Bastnäsite-(Ce) at this locality.
Data
Mineral Data:Click here to view Allanite-(Ce) data
Locality Data:Click here to view Linkpot cut, Airline Railroad, East Hampton (Chatham), Middlesex Co., Connecticut, USA
Photo GalleryView Gallery (4 photos)
Nearest other occurrences of Allanite-(Ce)
9.3km (5.7 miles) Strickland Quarry (Eureka Quarry), Strickland pegmatite (Strickland-Cramer Quarry; Strickland-Cramer Mine; Strickland-Cramer Feldspar-Mica Quarries), Collins Hill, Portland, Middlesex Co., Connecticut, USA
10.6km (6.6 miles) Connecticut Yankee atomic power plant, Haddam Neck, Haddam, Middlesex Co., Connecticut, USA
10.6km (6.6 miles) Walden Gem Quarry, Portland, Middlesex Co., Connecticut, USA
11.5km (7.1 miles) Andrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex Co., Connecticut, USA
36.0km (22.4 miles) Flatrock Quarry (Flat Rock Quarry; Crystal Mall), Waterford, New London Co., Connecticut, USA
59.8km (37.2 miles) Smith Granite quarry, Westerly, Washington Co., Rhode Island, USA
59.9km (37.2 miles) Redstone Granite Quarry (Cherenzia Quarry), Westerly, Washington Co., Rhode Island, USA
65.8km (40.9 miles) Sullivan Quarry (Armetta Quarry; Copar Quarry; Westerly Granite Co. Quarry), Bradford, Westerly, Washington Co., Rhode Island, USA
98.3km (61.1 miles) Tilly Foster Iron Mine, Brewster, Town of Southeast, Putnam Co., New York, USA
 
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