Color of Mn(V)-Substituted Apatites A10((B, Mn)O4)6F2, A=Ba, Sr, Ca; B=P, V

Hydroflux Synthesis and Characterization of the Non‐Centrosymmetric Oxomanganate(V) KSrMnO4

“…The two-electron transition to the 3 T 1 (P) energy level has a higher intensity than expected due to large cross sections of the transitions to the 3 T 1 (F) state and the charge transfer transition causing a saturation of energy states. [8] With lowering the manganese(V) content, this effect will be negated and a color change from green to blue occurs, as it was observed for substituted apatites. [8]…”

“…[8] With lowering the manganese(V) content, this effect will be negated and a color change from green to blue occurs, as it was observed for substituted apatites. [8]…”

“…[41] The [MnO 4 ] 3polyhedron in KSrMnO 4 has C 1 symmetry, which leads to a splitting of energy states resulting in more allowed transitions and thus broad bands in the UV/Vis spectrum. [8] In addition, the change of symmetry of the crystal field mainly influences the coloration.…”

“…Early complex manganese(V) oxides were prepared by Lux from a concentrated sodium hydroxide solution. [6] The known oxidic manganese(V) compounds primarily comprise perovskites, [2,7] apatites, [8][9][10] some doped oxides, [1,11] and several oxomanganates(V) with elements of the first two groups of the periodic Table. [12][13][14][15][16][17] Most of the reported manganese(V) oxides were synthesized by solid-state reaction.…”

“…[12][13][14][15][16][17] Most of the reported manganese(V) oxides were synthesized by solid-state reaction. [1][2][3][4][7][8][9][12][13][14][15][16] Recently, zur Loye et al presented the oxomanganates(V) compounds A 5 [MnO 4 ] 3 OH (A = Sr, Ba) [10] and KBaMnO 4 , [17] which they obtained via the hydroflux method.…”