...David A. Grisafe; William B. White Abstract The decomposition of PbCO 3 has been investigated by equilibrium methods over the range of 200 to 900° C. and 15 to 1400 bars P CO 2 . The four intermediate oxycarbonate phases are 2PbCO 3 · PbO, PbCO 3 · PbO, PbCO 3 · 2PbO, and 4PbCO 3 · 3PbO; these have...

... other Bi oxycarbonate mineral, kettnerite. Abstract La structure cristalline de la bismutite, Bi 2 (CO 3 )O 2 , a 3.865(2), b 3.862(2), c 13.675(6) Å, V 204.1(2) Å 3 , groupe spatial Imm 2, Z = 2, et celle de la béyerite, CaBi 2 (CO 3 ) 2 O 2 , a 3.7729(5), b 3.7742(7), c 21.726(4) Å, V 309.4(1) Å...

...Oleg I. Siidra; Erik Jonsson; Nikita V. Chukanov; Diana O. Nekrasova; Igor V. Pekov; Wulf Depmeier; Yury S. Polekhovsky; Vasiliy O. Yapaskurt Grootfonteinite, Pb 3 O(CO 3 ) 2 , is a new Pb oxycarbonate found in a mineralogically complex, banded assemblage from the Mn(-Fe) oxide ore unit...

.... Chemical composition of partially produced melt indicates that FS temperatures of up to 950 °C were reached in rare cases, whereas the lack of melt phase and predominance of litharge and lead oxycarbonates in most other samples implies that temperatures in most cases do not exceed 540 °C. Calculated...

... manganese pod mineralization in situ and in considerable detail for some decades. This is now reflected in the number of mineral species identified from the quarry, ~70, of which ~15 are unusual Pb oxychloride or oxycarbonate minerals ( Turner and Rumsey, 2010 ). Merehead Quarry is the type locality...

... carbonates similar in composition to adamsite-(Y). The TGA and DTA curves they presented are very similar to those of adamsite-(Y). They proposed that the final product after heating is a REE oxycarbonate, e.g. , YNaO(CO 3 ). Although the final product after heating was X-rayed, we found no suitable match...

... on the arrangement of cations . Struct. Bond. , 61 , 77 – 144 . Pring , A. , Birch , W.D. and Reller , A. ( 1990 ) An occurrence of lead oxycarbonate (PbCO 3 –PbO) as a mine fire product at Broken Hill, New South Wales . Mineral. Mag. , 54 , 647 – 9 . Roberts , A.C. , Stirling...

... Unpublished – this study, see Supplementary Materials Hydrated prismatic halloysite 0.35 0.006 58 Unpublished – this study, see Supplementary Materials Halloysite +  lanthanum oxycarbonate 130.4 2.031 64.2 Wei et al. ( 2019 ) a Unit conversions assuming ideal chemical formula. ...

... . Sadhu A. Singh S.P. Bhattacharyya S. ( 2014 ) Direct correlation of the morphologies of metal carbonates, oxycarbonates, and oxides synthesized by dry autoclaving to the intrinsic properties of the metals . Crystal Growth and Design , 14 , 4050 – 4067 . Saharay M. Yazaydin...

... analyses à la microsonde électronique minéral oxyde mercureux à iodure bromure chlorure et carbonate Vasilyevite is a new mercury oxycarbonate mineral containing essential iodine, bromine and chlorine, described recently by Roberts et al. (2003) from the claim of the Clear Creek mercury...

... as precursors for synthesis of rare earth oxycarbonates (RE 2 O 2 CO 3 ) and oxyfluorides (REOF), which are excellent host lattices for phosphors ( Lee and Jung 2013 ; Janka and Schleid 2009 ). RE hydroxycarbonates are also of interest for optical technologies ( Chakhmouradian and Wall 2012 ). Despite...

.... ( 2005 ): A large family of ion Ruddlesden-Popper relatives: From oxides to oxycarbonates and oxyhydroxides . Z. Anorg. All. Chem. , 631 , 1831 –1839 . Redhammer , G.J. , Tippelt , G. , Roth , G. , Lottermoser , W. , Amthauer , G. ( 2000 ): Structure and Mössbauer...

... and Tuttle 1960 ; Mercier et al. 1993 ; Haschke 1975 ; Hsu 1992 ; Pradip et al. 2013 ; Shivaramaiah et al. 2016 ). Interest in bastnäsite-type compounds has been growing in recent decades because of their use as starting materials for production of rare earth oxycarbonates (REE 2 O 2 CO 3...

..., oxycarbonates, oxides and their products of reduction Journal of Solid State Chemistry 1996 121 372 378 Roh Y. Biogeochemical and environmental factors in Fe biomineralization: magnetite and siderite formation Clays and Clay Minerals 2003 51 1 83 95 Salomons W. de Rooij N.M...

... Mine, Namibia, merotypically related to hydrocerussite. European Journal of Mineralogy, 30(2), 383–391. Grootfonteinite (IMA 2015-051), ideally Pb 3 O(CO 3 ) 2 , hexagonal, is a new Pb oxycarbonate found in a mineralogically complex, banded assemblage from the Mn(–Fe) oxide ore unit of the Kombat...

... ± 7.3 J/mol·K and it is zero for ordered butschliite. Thus butschliite is the stable low temperature polymorph and is calculated to transform to fairchildite at 822 K. The rare earth (Ln) metal oxides form oxycarbonate (Ln 2 O 2 CO 3 ) phases with CO 2 at low or moderate temperatures. They exist...