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Phosphophyllite from
State Forest Quarry #2 (State Forest No. 2 Mica Mine), Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA

Formula:Zn2Fe(PO4)2 · 4H2O
Comments:"occurs as a hydrothermal alteration of sphalerite and triphylite, in vugs of messelite, with vivianite, at the State Forest Mine in East Hampton. Very few specimens have been found, and they are small; the crystals are green and quite glassy, the largest being about an eighth of an inch in diameter. The author suspected the identity of this material from the time he discovered it, several years ago, but it was not confirmed until recently. Some of the optical data follows: R. I. 1.615; optical angle 45 degrees, more or less; optic sign negative; birefringence high." (Schooner 1961)
Abundance at site:Very Rare
Validity:Believed Valid
References:Schooner (1958); Schooner (1961)
Mineral Data:Click here to view Phosphophyllite data
Locality Data:Click here to view State Forest Quarry #2 (State Forest No. 2 Mica Mine), Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA
Mineral and/or Locality  
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