The phosphorus-rich variety of ellenbergerite (Mg0.61Ti0.08vacancy0.31)2 (Mg0.52Al0.43vacancy0.05)12 [SiO3(O0.29(OH)0.71)]6 [(P0.71Si0.20vacancy0.09) O3OH]2(OH)6 was studied by X-ray diffraction and IR spectroscopy. The structure was refined in sp. gr. P63mc to R = 0.0248. The structure of phosphorus-rich ellenbergerite retains the octahedral framework observed in the structures of ellenbergerite, phosphoellenbergerite, ekatite, and a series of structurally related synthetic compounds. The structure of phosphorus-rich ellenbergerite differs from the structure of ellenbergerite primarily in that the Mg and Al cations in the phosphorus-rich variety are disordered in the octahedra of the framework, thereby leading to higher symmetry, and the channels of triangular cross section are occupied predominantly by P tetrahedra.
|Autori:||ZUBKOVA NV; PUSHCHAROVSKY DY; PASERO M; MERLINO S; CHUKANOV NV|
|Titolo:||Crystal structure of phosphorous-rich ellenbergerite|
|Anno del prodotto:||2007|
|Digital Object Identifier (DOI):||10.1134/S1063774507020058|
|Appare nelle tipologie:||1.1 Articolo in rivista|