Phosphates of the Chalotskoe pegmatite deposit (Transbaikalia, Russia)

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Marco E. Ciriotti
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Phosphates of the Chalotskoe pegmatite deposit (Transbaikalia, Russia)

Messaggio da Marco E. Ciriotti » ven 12 gen, 2018 10:10

Referenza:
▪ Lykova, I.S., Varlamov, D.A., Chukanov, N.V., Pautov, L.A., Ksenofontov, D.A. (2017): Phosphates of the Chalotskoe pegmatite deposit (Transbaikalia). Zapiski RMO, 146(4), 44-53.

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Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 25818
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: Phosphates of the Chalotskoe pegmatite deposit (Transbaikalia, Russia)

Messaggio da Marco E. Ciriotti » ven 05 apr, 2019 11:12

Referenza:
▪ Lykova, I.S., Varlamov, D.A., Chukanov, N.V., Pautov, L.A., Ksenofontov, D.A. (2018): Phosphates of the Chalotskoe pegmatite deposit (Transbaikalia). Geology of Ore Deposits, 60, 636-642.

Abatract:
A number of rare phosphates have been found in specimens from the Chalotskoe pegmatite deposit, Transbaikal region, Russia: väyrynenite, MnBe[PO4](OH,F); parascholzite, CaZn2[PO4]2·2H2O; messelite, Ca2(Fe2+,Mn)[PO4]2·2H2O; eosphorite, MnAl[PO4](OH)2·H2O; moraesite, Be2[PO4](OH)4H2O; and fluorapatite. Väyrynenite forms pink grains 2–3 mm in size, less frequent prismatic crystals up to 0.8 × 3.0 cm, and spheres up to 3 mm in diameter. Parascholzite occurs as pockets up to 0.6 × 1.0 cm composed from snow-white small grains. Messelite forms pale yellow honeycomb grains and poorly shaped crystals up to 1 mm. Eosphorite has been seen in the Chalotskoe pegmatites before, but it has not been studied in detail. It occurs as red-brown prismatic crystals up to 8 cm in length, occasionally forming open-book-like aggregates and pink to pale pink grains up to 5 mm in size. Moraesite forms snow-white fibrous aggregates up to 5 × 6 mm, together with white spheres and short prismatic crystals of fluorapatite up to 1 mm. Microcline, albite, quartz, muscovite, beryl, schorl, almandine-spessartine, columbite-(Fe), and bertrandite are associated minerals. Väyrynenite and parascholzite are found for the first time in Russia.
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