Asbecasite: crystal structure refinement and crystal chemistry

Asbecasite: crystal structure refinement and crystal chemistry

The crystal structure of antimonian asbecasite in an ejectum of hypabyssal origin occurring at Tre Croci near Vetralla, Vico volcanic complex, Roman potassic province, Latium, Italy, has been refined to R = 0.042, and is compared to the original crystal structure determination carried out on the Sb-free asbecasite of hydrothermal metamorphic origin from the type-locality, Cherbandung in Binna v...

The crystal chemistry of the amphiboles II Refinement of the crystal structure of oxy-kaersutite

Three-dimensional counter-diffractometer data corrected for absorption and a full matrix least-squares method have been used to refine the crystal structure of an oxy-kaersutite in the on oal om os t on of 9t ~176 Oa.10 T10.~15Mn0.009A10.a~GS15.s~sA12.1220~(O )2 wlth cell and 3 lO5"388(5) ~ Cation site occupancies were refined using bulk chemical constraints and the A-site positionally disorder...

Crystal structure refinement of matlockite

Crystal structure refinement with SHELXL

The improvements in the crystal structure refinement program SHELXL have been closely coupled with the development and increasing importance of the CIF (Crystallographic Information Framework) format for validating and archiving crystal structures. An important simplification is that now only one file in CIF format (for convenience, referred to simply as `a CIF') containing embedded reflection ...

Ni2As2O7 pyrochlore nanomaterial: Solid state synthesis, crystal structure determination, crystal phase growth study and physical properties

Nanostructured Ni2As2O7 semiconductor samples were synthesized by a solid state method among As2O3 and Ni(NO3)2.6H2O raw materials at 650 °C (S1) and 750 °C (S2) as reaction temperatures. The synthesized nanomaterials were characterized by powder X-ray diffraction (PXRD) technique and F...