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F r o m W i k i p e d i a , t h e f r e e e n c y c l o p e d i a
Falsterite is a rare phosphate mineral[3] with the formula Ca2 MgMn2+ 2 (Fe 2+ 0.5 Fe 3+ 0.5 )4 Zn 4 (PO 4 )8 (OH )4 (H 2 O )14 .[2] It is a pegmatitic mineral, related to the currently approved mineral ferraioloite .[3]
Occurrence and association
[ edit ]
Falsterite was found in Palermo No. 1 pegmatite , North Groton, Grafton County, New Hampshire, US. Co-type locality is pegmatite at Estes quarry, Baldwin, Cumberland County, Maine, US. Falsterite is a product of alteration of triphylite and sphalerite .[2]
Crystal structure
[ edit ]
Main features of the crystal structure of falsterite, which is somewhat similar to that of schoonerite , are:
chains of Fen+ O 6 octahedra, displaying edge-sharing
chains of ZnO4 tetrahedra, that display corner-sharing
sheets, parallel to {010}, formed by linking the above two types of chains by PO4 tetrahedra
slabs formed by linking the sheets with MnO6 octahedra and CaO7 polyhedra
The slabs are bridged by dimers of MgO6 octahedra that display edge-sharing. Magnesium-bearing octahedra share edges with zinc-bearing tetrahedra.[2]
References
[ edit ]
^ a b c d Kampf, A.R., Mills, S.J., Simmons, W.B., Nizamoff, J.W., and Whitmore, R.W., 2012. Falsterite, Ca2 MgMn2+ 2 (Fe 2+ 0.5 Fe 3+ 0.5 )4 Zn 4 (PO 4 )8 (OH )4 (H 2 O )14 , a new secondary phosphate mineral from the Palermo No. 1 pegmatite, North Groton, New Hampshire. American Mineralogist 97(4 ), 496-502
^ a b c "Falsterite: Falsterite mineral information and data" . Mindat.org . Retrieved 2016-03-04 .
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e
R e t r i e v e d f r o m " https://en.wikipedia.org/w/index.php?title=Falsterite&oldid=1140520239 "
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