For successful development of novel rechargeable batteries, considerable efforts should be devoted to identifying suitable cathode materials that will ensure a proper level energy output, structural stability, and affordable cost. Among various compounds explored as electrode materials, analogues minerals–natural stable inorganic solids–occupy prominent place. The largest number varieties phosphate minerals occurs in rare metal granite pegmatites, many which contain transition metals...

A novel sodium bismuth oxo-cuprate phosphate chloride, Na6Cu7BiO4(PO4)4[Cl2.23(OH)0.77], containing square-kagomé layers of Cu2+ has been synthesized by hydrothermal techniques. The compound crystallizes in the tetragonal space group P4/nmm, a = 10.0176(4), c 10.8545(6), Z 2, V 1089.3(1) Å3, R1 0.021, wR 0.053, S 1.32. Its composite crystal structure includes [O4Cu6Bi]7+ layers, which are formed clusters oxygen-centered tetrahedra [OCu3Bi]. These positively charged two periodic fragments...

We studied the low-temperature specific heats of two antiferromagnets with two-dimensional square-kagome structure, i.e., ${\mathrm{KCu}}_{6}{\mathrm{AlBiO}}_{4}{({\mathrm{SO}}_{4})}_{5}\mathrm{Cl}$ $({\mathrm{KCu}}_{6})$ and ${\mathrm{Na}}_{6}{\mathrm{Cu}}_{7}{\mathrm{BiO}}_{4}{({\mathrm{PO}}_{4})}_{4}{[\mathrm{Cl},(\mathrm{OH})]}_{3}$ $({\mathrm{NaCu}}_{7})$, structural difference that there are interlayer ${\mathrm{Cu}}^{2+}$ ions in ${\mathrm{NaCu}}_{7}$. Both materials show no magnetic...

Copper substituted lithium iron phosphate, with the olivine structure, has been synthesized hydrothermally as dark-brown single crystals 15% of sites occupied by cupric ions. Single crystal X-ray diffraction and magnetic susceptibility,combined Li solid state NMR studies performed on powder sample, showed that 5% ions also reside site, giving formula Li0.95[(Fe2+)0.70(Fe3+)0.10(Cu2+)0.15Li0.05)]PO4. The compound exhibits anisotropic susceptibility orders antiferromagnetically at 48 K....

In the crystal structure of hydrothermally synthesized sodium manganese fluoride orthophosphate, Na2{MnF[PO4]}, two kind cis-MnO4F2 octahedra share common vertices to form (Mn2F2O8) chains parallel b axis monoclinic unit cell. a and c directions these are linked by PO4 tetrahedra three-dimensional framework tetrahedra. Na+ cations located in channels this structure. The problem {OTX5} mixed anionic radical polymorphism is discussed.

Abstract The mixed valence compound Na 2 Fe F 7 crystallizes in the monoclinic weberite structure of CuFeF ‐II type (M‐II), space group C2/c, Z = 16, a 12.676, b 7.422, c 24.710 Å, β 99.97°. Refinement on led to wR(F ) 0.117 for all 645 reflections, R 0.057 1 258 refl. with o > 4σ(F). On basis this and other recent single crystal investigations structures weberites M II III are classified four main types: O‐I is ‘classical’ orthorhombic (S.G. Imma) encountered e.g. mineral MgAlF , from...

Mixed potassium-manganese vanadate-carbonate, K(2)Mn(3)(VO(4))(2)(CO(3)), represents a novel structure type; it has been synthesized hydrothermally from the system MnCl(2)-K(2)CO(3)-V(2)O(5)-H(2)O. Its hexagonal crystal was determined by single-crystal X-ray diffraction with = 5.201(1) Å, c 22.406(3) space group P6(3)/m, Z 2, ρ(c) 3.371 g/cm(3), and R 0.022. The layered of compound can be described as combination honeycomb-type modules [MnO(6)] octahedra [VO(4)] tetrahedra, alternating in...

Mixed sodium nickel hydroxide phosphate, Na2Ni3(OH)2(PO4)2, has been synthesized hydrothermally from the system NiCO3-Na4P2O7-NaCl-H2O. Its monoclinic crystal structure determined by single X-ray diffraction: a = 14.259(5), b 5.695(2), c 4.933(1) Å, β 104.28(3)°, space group C2/m, Z 2, ρc 3.816 g cm(-3), R 0.026. The underlying spin model characterized in terms of first-principles electronic calculations. compound is formed alternating layers [NiO6] octahedra and [NaO7] polyhedra, combined...

A crystal fiber of yttrium scandate YScO3 doped with Nd3+, a cubic bixbyite-type structure, has been synthesized through laser-heated pedestal growth for the first time. Its structure determined using low-temperature (150 K) single-crystal X- ray diffraction: space group Ia3̅, = 10.2166(1) Å, R 0.0177. new phase was characterized micro-Raman scattering and fluorescence. Fluorescence excitation measurements show two complex local positions Nd3+ in lifetimes τ1 290 τ2 250 μs (4F3/2 multifold)...

The crystal structure of baricite, the Mg-dominant analogue vivianite, (Mg 1.70 Fe 2+ 1.30− x 3+ )(PO 4 ) 2 (OH) ·(8− )H O, a 10.085(2), b 13.390(3), c 4.6713(9) A, β 104.96(3)°, V 609.4(1) A 3 , space group C 2/ m Z = 2, ρ calc 2.440 g/cm has been determined [automated single-crystal diffractometer, Mo K α, graphite monochromator, image-plate area-detector system, T 193 K, 5714 reflections, w R 0.106 for all 1244 unique 0.043 965 observed reflections with I ≤ 2σ( )]. refinement site...

The novel phase Na2-xCo6(OH)3[HPO4][Hx/3PO4]3 (x≈ 1.1) was prepared by hydrothermal synthesis at 553 K. Its crystal structure determined using single-crystal X-ray diffraction data and refined against F(2) to R = 0.052, including positions of all hydrogen atoms. compound crystallizes in the hexagonal space group P63mc, with unit-cell parameters a 12.630(3) Å, c 5.017(1) V 693.1(3) Å(3), Z 2. is based on 3D framework built from CoO6 octahedra PO4 tetrahedra. Channels [001] direction...

Single crystals of the RbCuAl(PO₄)₂ compound with an open 3D framework structure were obtained by a hydrothermal route. The orders antiferromagnetically at <italic>T</italic>_N = 10.5 K and exhibits spontaneous magnetization lower temperature.

The synthesis and characterization of a (VO) 2+ representative in the bradleyite family compounds is reported. character Na atom distribution structure allows considering 3 (VO)(PO 4 )(CO ) as potential cathode material.

The borophosphate family incorporates compounds with crystal structures ranging from densely packed to microporous.We have synthesized several transition metal borophosphates alkali-metal cations and determined their using single-crystal X-ray diffraction at 100 K. Crystal chemical interpretations of studied phases in correlation literature data has allowed us reveal some new features title group compounds. One among them presents a tendency subsistence phosphate archetypes for phases....

We synthesized single crystals of Na0.55Ni6(OH)3(H0.61PO4)4 (I) and polycrystals (Na, Ni)0.64Ni5.68(OH)3(H0.67PO4)4 (II) with ellenbergerite-like structures using the hydrothermal method. The phases crystallize in hexagonal space group P63mc following unit cell parameters: a = 12.5342(1) Å, c 4.9470(1) V 673.08(2) Å3 for I; 12.4708(2) 4.9435(2) 665.82(2) II; Z 2. Their crystal are based on 3D framework built from NiO6 octahedra PO4 tetrahedra. difference between I II lies way structural...

Abstract A new iron(II) orthophosphate K[Fe(PO 4 )] has been obtained by hydrothermal synthesis and its crystal structure was determined single‐crystal X‐ray diffraction: space group P 2 1 / n , Z = 8, a 9.6199(10), b 8.6756(8), c 10.8996(13) Å, β 115.577(8)° at 193 K, R 0.023. Fe II shows coordination numbers (CN) (distorted tetrahedral) CN 5 trigonal bipyramidal). The [FeO ] units form together with the [PO tetrahedra microporous 3D para‐framework open channels along directions. potassium...