Structural and thermal properties of Na₂Mn(SO₄)₂·4H₂O and Na₂Ni(SO₄)₂·10H₂O

Abstract

Two compounds were prepared via a supersaturation method. Their crystal structures were solved and compared to Na2M(SO4)2·nH2O (M = Mn, Ni and n = 0, 1, 2, 3, 4, 5, 6, 10, 16). Furthermore, phase transitions as a function of temperature were observed.

Statistical analysis of PN clusters in Mo/VFe protein crystals using a bond valence method toward their electronic structures

“…The bond valence method was rst used to analyze inorganic crystal structures [32][33][34][35][36] and was gradually applied in other elds. [37][38][39][40][41] It can be traced back historically to a proposal by Pauling.…”

Manganese‐based polyanionic cathodes for sodium‐ion batteries

“…As for other materials such as Na 2 Mn 3 (SO 4 ) 4 [128,129] , Na x Fe 0.5 Mn 0.5 (SO 4 ) 2 [130] , Na 2+d Mn 2−d/2 (SO 4 ) 3 [131,132] , Na 2.44 Mn 1.79 (SO 4 ) 3 [133] , Na 2 Mn(SO 4 ) 2 •nH 2 O [134] , K 0.5 Na 1.5 Mn 1.5 Mg 0.5 (SO 4 ) 3 [135] , and so on, they are still only available at the level of theoretical studies or experimental synthesis. Generally, sulfates can be synthesized below 450°C by low-temperature solid-state, ionothermal or solution processes.…”