Synthesis and structural variety of first Mn and Bi selenites and selenite chlorides

Abstract

Single crystals of new Mn2[Bi2O](SeO3)4 (I), MnBi(SeO3)2Cl (II), MnIIMnIII(SeO3)2Cl (III), Mn5(SeO3)2Cl6 (IV), and Mn4(Mn5,Bi)(SeO3)8Cl5 (V) have been synthesized by chemical vapour transport and hydrothermal methods. They have been structurally characterized by single crystal X-ray diffraction analysis. The compounds II–V are the first Mn selenite chlorides, while the I, II and V compounds are the first Bi-containing Mn oxoselenites. Structural relationships of the new phases with other compounds are discussed. An overview of the mixed-ligand MnOmCln polyhedra in inorganic compounds is given.

Mineral-Inspired Crystal Growth and Physical Properties of Na2Cu(SO4)2 and Review of Na2M(SO4)2(H2O)x (x = 0–6) Compounds

“…In most of the structures, transition-metal cations exhibit octahedral environments of different degrees of distortions except for the Na 2 Cu­(SO 4 ) 2 phase discussed in the present work. To quantify the degree of distortions of M O 6 polyhedra, the Δ d parameter defined previously for perovskites, mixed M O 6 ( M = Cu, Zn) octahedra in Cu, Zn oxysalt minerals and recently the mixed MnO n Cl m octahedral coordination environments was used. This parameter concerns the deviation of M –O distances with respect to its average value for each polyhedron and can be calculated as follows: Δ d = (1/6)∑ n=1,6 [( d n – ⟨ d ⟩)/⟨ d ⟩] 2 , where ⟨ d ⟩ is the average M –O distance in a given octahedron (Table ).…”

Tunable magnetic order in low-symmetry SeO3 ligand linked TM3(SeO3)3Taddei1, Sanjeewa2, Xing3 et al. 2020Phys. Rev. Materials4010View full textAdd to dashboardCite

“…[36] B. Zero-Field Magnetic Structures Aside from some preliminary magnetic susceptibility measurements on Mn 3 (SeO 3 ) 3 H 2 O, very little work has been performed to actually characterize the magnetic properties of these compounds. [23,37,38] As we show here, these materials have a rich magnetic behavior with indications of moderate frustration and a tunability via TM selection.…”

Coexistence of Long-Range Magnetic Order and Magnetic Frustration of a Novel Two-Dimensional S = 1/2 Structure: Na2Cu3(SeO3)4

“…Although a wide range of metal selenites have been reported, [28,29] the investigation of the magnetic properties of transition metal selenium(IV) oxyanions has been very limited, and only a handful of reports are available in the literature. Furthermore, selenium can adapt [SeO 3 ] 2− and [Se 2 O 5 ] 2− oxyanion configurations, which can form a high number of different structural arrangements in extended solid structures providing a rich and diverse crystal chemistry [30][31][32].…”