Microporous crystal structure of labuntsovite-Fe and high-pressure behavior up to 23 GPa

Labuntsovite-Fe from a peralkaline pegmatite located on mount Nyorkpakhk, in the Khibiny alkaline complex, Kola Peninsula, Russia, has been investigated by means of electron microprobe analyses, single-crystal X-ray structure refinement, and IR and Raman spectroscopies. The equation of state resulted in the bulk modulus K = 72 (2) GPa, K′ = 3.7 (2) and V₀ = 1363 (2) ų.

X-ray, dielectric, piezoelectric and optical analyses of a new nonlinear optical 8-hy­droxy­quinolinium hydrogen squarate crystal

The structure of a novel nonlinear optical 8-hydroxyquinolinium hydrogen squarate single crystal and the three-dimensional expansion of its supramolecular chain are reported. Hirshfeld surface analysis shows that the 8-hy­droxy­quinolinium cation and the hydrogen squarate mono-anion are connected through O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds.

The crystal structure of cesbronite, Cu₃TeO₄(OH)₄: a novel sheet tellurate topology

The novel crystal structure of cesbronite has been determined. It is composed of corrugated sheets of edge-sharing CuO₆ and (Cu_0.5Te_0.5)O₆ octahedra and shows well defined ordering of Cu and Te.

Supramolecular heterosynthon assemblies of ortho-phenyl­enedi­amine with substituted aromatic carb­oxy­lic acids

Five crystal structures obtained from co-crystallization experiments of ortho-phenyl­enedi­amine with substituted aromatic acids (phthalic acid, salicylic acid, 4-hy­droxy­benzoic acid, 4-nitro­benzoic acid and 3,5-di­nitro­benzoic acid) are reported. The formation of heterosynthons between cation and anion in the five salts is discussed.

Using structural mimics for accessing and exploring structural landscapes of poorly soluble molecular solids

The concept of using a structural mimic for accessing and identifying the most important solid-state structural features in target molecules that are difficult to crystallize is explored.

Bond-length distributions for ions bonded to oxygen: results for the lanthanides and actinides and discussion of the f-block contraction

Bond-length distributions have been examined for 84 configurations of the lanthanide ions and 22 configurations of the actinide ions bonded to oxygen. The lanthanide contraction for the trivalent lanthanide ions bonded to O²⁻ is shown to vary as a function of coordination number and to diminish in scale with increasing coordination number.

Bond-length distributions for ions bonded to oxygen: metalloids and post-transition metals

Bond-length distributions are examined for 33 configurations of the metalloid ions and 56 configurations of the post-transition metal ions bonded to oxygen. Lone-pair stereoactivity is discussed.

Bond-length distributions for ions bonded to oxygen: results for the non-metals and discussion of lone-pair stereoactivity and the polymerization of PO₄

Bond-length distributions are examined for three configurations of the H⁺ ion, 16 configurations of the group 14–16 non-metal ions and seven configurations of the group 17 ions bonded to oxygen. Lone-pair stereoactivity for ions bonded to O²⁻ is discussed, as well as the polymerization of the PO₄ group.

A novel representative in the rare family of trivanadates, KMn₂V₃O₁₀: synthesis, crystal structure and magnetic properties

In the crystal structure of KMn₂V₃O₁₀, tetramers of MnO₆ octahedra sharing edges and trimers of VO₄ tetrahedra sharing vertices are linked in a three-dimensional framework with channels occupied by K³⁺ ions. The novel representative in the rare family of trivanadates orders antiferromagnetically at T_N = 8.2 K.

Crystal structure refinements of tetragonal (OH,F)-rich spessartine and henritermierite garnets

Single-crystal X-ray diffraction data was used to obtain reliable structural parameters, including H-atom positions, F and OH anion groups in spessartine and henritermierite.

Determination of hydrogen site and occupancy in hydrous Mg₂SiO₄ spinel by single-crystal neutron diffraction

A single-crystal neutron diffraction study was performed on hydrogen incorporation in ringwoodite, which is the most important host mineral of water in the Earth's deep mantle. Its hydrogen incorporation mechanism, bonding geometry and occupancy at the relevant hydrogen site were unambiguously revealed.

Earth Materials. Introduction to Mineralogy and Petrology. 2nd edition. By Cornelis Klein and Anthony Philpotts. Cambridge University Press, 2016. Pp. 616. Price GBP 49.99 (ISBN 9781316608852, paperback), GBP 100 (ISBN 9781107155404, hardcover)