 | | Journal (article/letter/editorial) | | pages 941-946, 1978 Petscheckite andliandratite,two newpegmatitemineralsfrom Madagascar AnNo MUcxn nNIoHuco...new metamict minerals in the Antsakoa I pegmatite near Berere tn Madagascar. They were recrystallized through...investigated with the following results: (l) Petscheckite, hexagonal,spacegroup P3lm' a : 6.42, idealizedas...varieties occur: oxy-petscheckite, Un+ (FelAI v'XNb,Ta)zOg and hydroxy-petscheckite,Ua+(Fe!r+'!rr')(Nb...rr')(Nb,Ta)rO'(O,OH )' ( 2 ) L i a n d r a t i t e ,U 6 + ( N b , T a ) 2 O ss,p a c eg r o u p P 3 l m , |  | | Report (issue) | | U4+ Fe2+ (Nb, Ta)2O8 Petscheckite c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: to 4...c = 4.02 Z=1 X-ray Powder Pattern: Berere, Madagascar; after heating at 650 ◦ C. 4.02 (10), 3.21 (10)...32 0.49 0.05 99.59 2+ (1) Berere, Madagascar; [“oxy-petscheckite” with Fe oxidized to Fe3+ ] corresponding...Occurrence: An accessory mineral in a zoned pegmatite. Association: Magnetite, columbite, liandratite...From the Antsakoa I pegmatite, near Berere, about 40 km northeast of Tsaratanana, Madagascar. Name: Honors |  | | Journal (article/letter/editorial) | | 163 –175 Stuttgart, April 2004 REE-bearing petscheckite from Tiltvika, Nordland, Norway, and its heating...Raade, G. & Bermanec, V. (2004): REE-bearing petscheckite from Tiltvika, Nordland, Norway, and its heating...of a mineral sample from the Tiltvika granite pegmatite, Norway, shows the presence of a metamict phase...650 C for 21 hours, the diffraction pattern of petscheckite, a hexagonal mineral with idealized formula...Fe2 + (Nb,Ta)2O8, is observed. The Tiltvika petscheckite is rich in REEs and has the general formula |  | | Journal (issue) | | , and D. R. Cook Hyalite from the Spruce Pine District, North Carolina ................................treasured reference works and publications (including, as I said, early issues of the Record) will not be around...remain. Not that I don’t enjoy these other publications and mourn their eventual demise . . . I do indeed (editors...invited to contact me for more information). But I can’t help smiling at the thought that our total,...hydroxyl member of the series: hydroxyl-herderite. I INTRODUCTION Herderite, CaBe(P04)F, and hydroxyl-herderite |
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