Nitrogen Oxide Adsorption Property of AxFexSn8-xO16 Hollandite (A: K, Rb, Cs)

Temporary negative-ion states of Na, K, Rb, and Cs.

Magnetism of Alkalitetrafluoromanganates (III) AM11F4 (A = K, Rb, Cs): Neutron Diffraction, Mössbauer and Magnetization Investigations

The magnetic properties of the d 4 Jahn-Teller systems A 'Mn m F 4 with layered structures were investigated. Neutron diffraction on powders of K M n F 4 and RbMnF 4 revealed different antiferromagnetic spin arrangements below TN = 4.5 K and 2.3 K, respectively: for K M n F 4 canted antiparallel along a and b, for RbMnF 4 parallel along a and antiparallel along b, in both cases parallel along c...

APSe6 (A = K, Rb, and Cs): Polymeric selenophosphates with reversible phase-change properties.

The ternary alkali selenophosphates KPSe6 and RbPSe6 crystallize in the polar orthorhombic space group Pca2(1) with a = 11.7764(17) A, b = 6.8580(10) A, c = 11.4596(16) A, and Z = 4 for RbPSe6. CsPSe6 crystallizes in the monoclinic space group P2/n with a = 6.877(3) A, b = 12.713(4) A, c = 11.242(4) A, beta = 92.735(7) degrees, and Z = 4. All compounds feature the one-dimensional infinite chain...

Elasticity of (K,Na)AlSi3O8 hollandite from lattice dynamics calculations

We compute the elastic constants tensor and the seismic properties of KAlSi3O8 and K0.8Na0.2AlSi3O8 up to the ferroelastic transition using density-functional theory and density-functional perturbation theory in the ABINIT implementation. We observe a softening of the tetragonal shear with pressure that precedes the ferroelastic transition. The Reuss shear moduli become negative at respectively...

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