Komarovite, a new niobiosilicate of calcium and manganese

Portnov, A.M.; Krivokoneva, G.K.; Stolyarova, T.I.

doi:10.1080/00206817209475725

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2006

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“…Formation of the murataite (M-3C) or phases containing murataite modules (M-5C, M-7C, M-8C) is more typical of Y-rather than Gd-containing ceramics that is consistent with reference data on natural analogs [12,13] and our previous works [14]. At that, as a rule, at least two phases with the fluorite-derived structure with two-(pyrochlore), three-(murataite) elementary fluorite unit cell and intermediate varieties built from murataite and pyrochlore modules with five-, seven-and eight-fold fluorite unit cells are produced.…”

Section: Resultssupporting

confidence: 83%

Phase Relations In The Systems Based On Yttrium, Gadolinium, Manganese, Titanium, and Uranium Oxides Doped with Calcium, Aluminum and Iron Oxides

Stefanovsky¹,

Stefanovsky²,

Yudintsev

et al. 2006

MRS Proc.

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Titanate-based ceramics with yttrium, gadolinium, manganese, uranium, calcium, aluminum, and iron oxides being of interest as matrices for radioactive wastes containing lanthanides, actinides and corrosion products were synthesized using cold pressing and sintering and melting routes. Major constituents of the ceramics are fluorite structure phases (pyrochlore, "murataite", cubic oxide with fluorite-related lattice) as well as brannerite. Incorporation of aluminum and iron oxides (corrosion products) forms second phases with perovskite or/and crichtonite structure.

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Section: Resultssupporting

confidence: 83%