 | | Journal (article/letter/editorial) | | ASSEMBLAGE OF PHOSPHATE MINERALS, KIBINGO GRANITIC PEGMATITE, RWANDA ANDRÉ-MATHIEU FRANSOLET AND FRÉDÉRIC...France ABSTRACT A sample from the Kibingo granitic pegmatite, Rwanda, shows a striking assemblage of an...an alluaudite-group mineral with heterosite. The core of alluaudite s.l. is strongly pleochroic in blue...results from an oxidation, Na+ + Fe2+ → 䡺 + Fe3+. Heterosite exhibits cracks that are parallel to one of the...product of alteration, identified as cyrilovite. Heterosite shows a chemical composition close to the idealized |  | | Journal (article/letter/editorial) | | Na-in-triphylite geothermometer: applications to natural pegmatite phosphates Frederic Hatert • Luisa Ottolini Peter...assemblages from the Kibingo (Rwanda), Hagendorf-Süd (Germany), and Buranga (Rwanda) pegmatites, respectively...ferrisicklerite [Li1-x(Fe3?,Mn2?)PO4] from the Buranga pegmatite, Rwanda, without any replacement texture. This observation...(1989) re-examined the samples from the Buranga pegmatite and observed three different primary assemblages:...fillowite in Rusororo, Rwanda, and Kabira, Uganda; alluaudite ? ferrisicklerite ? heterosite [(Fe3?,Mn3?)PO4] |  | | Journal (article/letter/editorial) | | Li1–x(Fe3+,Mn2+)(PO4)–Li1–x(Mn2+,Fe3+)(PO4), and heterosite–purpurite, (Fe3+,Mn3+)(PO4)–(Mn3+,Fe3+) (PO4)...between 400 and 600C, during the first stages of pegmatite evolution [hühnerkobelite is not a valid species...alluaudite and ferrisicklerite from the Buranga pegmatite, Rwanda, without any replacement texture. This observation...(1989) re-examined the samples from the Buranga pegmatite, and observed three different primary parageneses:...size of the alluaudite grains from the Buranga pegmatite, which can reach 1 cm in length, is also a good |
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