...Fabrice Brunet; Camille Crouzet; Sorina Cretu; Rénald David; Matthieu Courty; Arnaud Demortière; Nadir Recham Single-phase marićite, NaFePO 4 , was synthesized from a mixture of monosodium phosphate and iron oxalate at 750 °C and atmospheric pressure. Thermal treatment of synthetic marićite in air...

... of the photograph is approximately 1 mm). (c) Large pink crystals of Na 4 Fe 2+ Fe 3+ (PO 4 ) 3 , associated with tiny grains of colorless marićite and with Na 7 Fe 2+ Fe 3+ 3 (PO 4 ) 6 green, idiomorphic crystals. The strong pleochroism of Na 7 Fe 2+ Fe 3+ 3 (PO 4 ) 6 , with colors from bottle green to pinkish...

...Figure 3 Stability of natrophilite, karenwebberite and marićite in the Fe/(Fe+Mn) – T field. The points represent the chemical compositions of synthetic marićites reported by Hatert et al. (2006 , 2011 ), and the high-temperature stability limit of natrophilite has been constrained from...

.... The following standards and crystals were used ( K α X-ray lines): F: fluororiebeckite, TAP; Mg: forsterite; TAP; Al: andalusite, TAP; Si: diopside, PET/TAP; P: maricite, PET; Mn: spessartine, LiF; Fe: maricite, LiF. The resulting chemical composition and unit formula are given in Table 2 ; the BeO and H 2 O...

... with the Northwest Territories at approximate longitude 68° 28′ N, latitude 136° 28′ W ( Fig. 1 ). There are 46 phosphate minerals identified as occuring at this locality, and BFR is the type locality for the minerals barićite ( Sturman & Mandarino 1976 ), gormanite ( Sturman et al . 1981a ), marićite ( Sturman...

...* −545.5* 105.5 5 e−22 4 e−4 1 e−3 NaFePO 4 maricite 102.2†† −34.8* −459.7* 57.9 1 e−18 1 e−6 4 e−4 Ca 5 (PO 4 ) 3 (OH) hydroxyapatite 287.5* −119.2† −1364.7* 356.0 4 e−51 7 e−7 3 e−8 Ca 5 (PO 4 ) 3 F fluorapatite 308.0* −99.8† −1368.6* 371.0 1 e−54 3 e−7 2 e−8 Cu 2...

... more typical of tetrahedral Fe 3+ , but are more reasonably attributed to M1 and M2. Maricite ( Le Page and Donnay 1977 ) MDD14 contains both Fe 2+ and Fe 3+ in the Fe site. In messelite ( Fleck and Kolitsch 2003 ) DD228, Fe is only in the Fe site. In metavivianite ( Chukanov et al. 2012 ) DD319, Fe...

... for phosphorus have been determined by structure refinement. This may indicate that the number of symmetrical stretching modes is not consistent with the number of non-equivalent phosphates in lasnierite, as has already been observed for brianite or marićite ( Litasov & Podgornykh, 2017 ). No peaks were...

... , B.H. ( 1958 ) Stottite, ein neues Germanium-mineral and seine Paragenese in Tsumeb . Neues Jahrbuch Mineralogie Monatshefte , 85 – 96 . Sturman , B.D. , Mandarino , J.A. , and Corlett , M.I. ( 1977 ) Marićite, a sodium iron phosphate, from the Big Fish River area, Yukon...