...Giancarlo Capitani This high-resolution transmission electron microscopy (HRTEM) investigation of (Ca, REE)-fluorcarbonates from Mount Malosa (Malawi), previously characterized by bulk techniques, is aimed at elucidating the pervasive syntactic intergrowths that commonly affect these minerals...

... granite-syenite pegmatites of the Mount Malosa pluton in Malawi, associated with rhabdophane-(Ce), (Ce, La)PO 4 ·nH 2 O, rhabdophane-(La), (La, Ce)PO 4 ·nH 2 O, and cerianite-(Ce), CeO 2 that replaces bastnäsite-(Ce) and/or parisite-(Ce). Note that synchysite-(Ce), rhabdophane-(La), rhabdophane-(Ce...

... layers [and related names in different coding systems; further details in Capitani (2019) ] stacked along the c -axis (vertical). (Color online.) In this study, we investigate well characterized CRFC from Mount Malosa (Malawi) ( Guastoni et al. 2009 , 2010 ; Capitani 2019 ) by combining Raman...

.... , 2003 ). These pegmatites, which crop out close to the summit of Mount Malosa, are sub-horizontal, highly miarolitic and often contain large open cavities, sometimes hosting large (10–20 cm long) euhedral aegirine crystals. Taking into account the aforementioned geochemical and textural aspects...

... , A. & Pezzotta , F. ( 2007 ): REE-mineral phases replacing helvite, niobian-rutile, bastnäsite-(Ce) from alkaline pegmatites of Mount Malosa, Zoma District, Malawi . in “ Granitic pegmatites: The state of the art ”, International Symposium , Porto, Portugal (abstract) , 42 – 43 . Guastoni...

... element (REE) carbonates from alkaline pegmatites of Mount Malosa, Malawi . American Mineralogist , 94 , 1216 – 1222 . Hanchar , J.M. , Finch , R.J. , Hoskin , P.W. , Watson , E.B. , Cherniak , D.J. , and Mariano , A.N. ( 2001 ) Rare earth elements in synthetic zircon...

...-crystal X-ray diffraction on aegirine in the cavities from Mount Malosa indicates that the crystallization occurred at ~1 kbar and at temperature of 300–400 °C ( Secco et al. 2007 ). The eudidymite samples from the Zomba-Malosa pluton show large, white, opaque crystals, tabular on (001), pseudo...

... A. Nestola F. Giaretta A. ( 2009 ) Mineral chemistry and alteration of rare earth element (REE) carbonates from alkaline pegmatites of Mount Malosa, Malawi . American Mineralogist , 94 , 1216 – 1222 . Harwood M.G. ( 1949 ) Variation in density and colour of cerium oxide . Nature...

... analyzed from Baveno and Mount Malosa, two barren intrusions; however, these two localities are famous for a large variety of rare minerals (including ore minerals) occurring in the miarolitic cavities. From Mount Malosa, cassiterite, scheelite, and many REE-bearing minerals have been described ( Demartin...

... . Cámara , F. , Doukhan , J.C. , Salje , E.K.H. ( 2000 ): Twin walls in anorthoclase are enriched in alkali and depleted in Ca and Al . Phase Transit. , 71 , 227 – 242 . Capitani , G.C. ( 2019 ): HRTEM investigation of bastnäsite-parisite intergrowths from Mount Malosa...

... – 667 . Guastoni , A. , Nestola , F. and Giaretta , A. ( 2009 ) Mineral chemistry and alteration of rare earth element (REE) carbonates from alkaline pegmatites of Mount Malosa, Malawi . American Mineralogist , 94 , 1216 – 1222 . Guastoni , A. , Kondo , D...

... deposit (alteration product of fluocerite) South central Sweden 9 I Alkaline pegmatites Mount Malosa, Malawi 10 I Metasomatic rocks Terskii greenstone belt, Kola, Russia 11 I Carbonatitic rocks, Kerimasi volcano Gregory Rift, Tanzania 12 II Syenite pegmatite Skien, Norway 13...

... interest in minerals by attending mineral shows with his parents as a toddler and developed a passion for field collecting. Don M. Doell has a special interest in pegmatite mineralogy, especially phosphates, and mineralogy from alkaline deposits, such as Mount Saint Hilaire and Mount Malosa. Together...

... spectroscopies done on both single crystals (FTIR and Raman) and powders (FTIR). The samples were purchased from a mineral dealer. The host rock is an alkali pegmatite from Mt. Malosa, Zomba District (Malawi), and consists of centimeter-sized orthoclase with large (up to several cm long) amphibole and aegirine...

... . Rivista Mineralogica Italiana , 30 , 247 – 251 . Guastoni A. Nestola F. Giaretta A. ( 2009 ) Mineral chemistry and alteration of rare earth element ( REE ) carbonates from alkaline pegmatites of Mount Malosa, Malawi . American Mineralogist , 94 , 1216 – 1222 . Hsu...

..., and (2) a sample of niobophyllite from the Zomba–Malosa pegmatite, Monte Malosa, Zomba, Malawi, from the mineral collection of Adriana and Renato Pagano (sample 8714). The niobophyllite from Malawi, described as such by Guastoni et al . (2003) , turned out to be Sn-rich astrophyllite. In this paper...

... over Ta, with an enrichment in Ti, Y, REE, Zr, Th, U, Sc and F ( Černý 1992 , Wise 1999 ). Thus they contrast strikingly in many ways with the LCT pegmatites described earlier. As an example, we may consider the bodies of NYF pegmatite that occur at Mount Malosa in Malawi, associated...

..., Filipstad, Värmland, Sweden Holtstam and Langhof (2007) Jonsson (2004) Bertrandite 2835 Mount Francisco pegmatites, East Pilbara, Western Australia, Australia Jacobson et al. (2007) Jacobson et al. (2007) Beryl 3000 Sinceni pluton area, central Swaziland Trumbull (1993) Trumbull...