In the course of investigating structural modifications of the 3-,4-connected net known as the Pt3O4 structure-type (waserite), a novel 4-,8-connected structure-type was discovered. This lattice is generated by replacing the 3-connected trigonal planar vertices of the Pt3O4 structure-type with 4-connected tetrahedral vertices, to achieve a structure which possesses a generic empirical formula o...

The structure of the recently reported transparent conductor, Ga32xIn51xSn2O16 (0.3(x(1.6), was established by a combination of high-resolution electron microscopy, convergent-beam electron diffraction, and Rietveld analysis of powder diffraction data (X-ray and time-of-flight neutron methods). This ‘‘T-phase’’ compound has an anion-deficient fluorite-derivative structure whose space group is I...

The structure of the title compound, barium lanthanum bromide (11/4/34), can be derived from the fluorite structure. The asymmetric unit contains two Ba sites (one with site symmetry 4/m..), one La site (site symmetry 4..), one mixed-occupied Ba and La site (ratio 1:1, site symmetry m..) and six Br sites (one with site symmetry \=4.., one with 2.., one with m.., the latter being disordered over...

Gabal El-Ineigi fluorite-bearing rare-metal granite with A-type affinity, located in the Central Eastern Desert of Egypt, is distinguished by its abundance large fluorite-quartz veins and mafic enclaves. Plagioclase (labradorite to oligoclase), Mg-rich biotite, hornblende are main components enclaves, significant amounts fluorite as essential phases, titanite Fe-Ti oxides (Nb-free rutile ilmeni...

This article presents new isotope-geochronological results for the granites of Voznesensky ore district (southeastern part Khanka massif). The are associated with extensive rare-metal–fluorite, tin and tantalum mineralization. Despite numerous published Rb–Sr, Sm–Nd U–Pb dating ore-bearing ores, issues age correlation genetic relationship igneous rocks mineralization remain unclear. zircon SHRI...