Crystal structure of potassium indium (monophosphate-hydrogenmonoborate- monophosphate), KIn[BP2O8(OH)]

Abstract

Source of materialΚΙη[ΒΡ20β(0Η)] was synthesized under mild hydrothermal conditions. The reactions were carried out with mixtures of In metal (0.057 g) dissolved in 1 ml of HCl (18%), H3BO3 (0.062 g) and K2HPO4 (0.522 g) (molar ratio of In:P:B = 1:2:3) in aqueous solution. The mixtures were sealed in glass tubes (after adding 1 ml H2O to achieve a degree of filling of 30%) with subsequent heating at 418 Κ for 14 days. The starting materials were all of analytical purity grade. Discussion

Crystal structure of potassium scandium (monophosphate-hydrogenmonoborate- monophosphate), KSc[BP2O8(OH)]

“…Our extensive studies on borophosphates containing scandium as well as alkali metals led to the preparation of the first alkali metal scandium borophosphate KSc[BP 2 O 8 (OH)]. The crystal structure of the title compound is an isotype of the RbSc [4], NH 4-In [5], K-In [6], K-Fe [7] and Rb-In [8] …”

Crystal structure of rubidium scandium (monophosphate-hydrogenmonoborate- monophosphate), RbSc[BP2O8(OH)]

“…The ScO and ScOH bond distances range from 2.05 Å to 2.15 Å. Bond lengths and angles of borate and phosphate tetrahedra within the anions are similar to those in related borophosphates [5][6][7][8][9]. …”

“…During our systematic investigations in the systems M 2OSc2O3 B 2O3P2O5H2O (M = Li, Na, K, Rb, Cs) a new borophosphate, RbSc[BP 2 O 8 (OH)], was synthesized. The crystal structure of the title compound is isotypic to those of the K-Sc [5], K-Fe [6], NH 4 -In [7], K-In [8] and Rb-In [9] analogues. The anionic partial structure comprises open branched 4-membered rings (a loop-branched hexamer) [BP 2O8(OH)] 4 , which are formed by alternating hydrogenborate and phosphate tetrahedra sharing common corners with two additionally branching phosphate tetrahedra.…”

Crystal structure of barium cobalt(II) (monophosphate-hydrogenmonoborate- monophosphate), BaCo[BP2O8(OH)]

“…Barium ions reside within the channels. Barium was found to be tenfold coordinated by oxygen and the Ba-O contacts vary from 2.742(3) Å to 2.998(3) Å.T he Co-O and Co-OH bond distances range from 2.046(3) Å to 2.224(3) Å.Bond lengths d(P-O) and d(B-O) as well as bond angles within the complex anion correspond to respective values similar to related borophosphates [6][7][8][9][10][11][12]. …”

“…Borophosphates represent aclass of compounds with anionic buliding units of the general formula [B w P x O y H z ] n- [2]. [6], K-In [7], NH 4 -In [8], Rb-In [9], K-Sc [10], Rb-Sc [11], Pb-Zn [12], Pb-Co [12] and Ba-Fe [13] 4-,which is formed by alternating hydrogenborate and phosphate tetrahedra sharing common vertices with two additionally branching phosphate tetrahedra. The condensation of the borophosphate anions with CoO 5(OH) octahedra via common corners results in an overall three-dimensional framework containing channels running along [100].…”