Premium
The Trivalent Manganese Hydrogenophosphate LiMn(H 2 P 2 O 7 ) 2 : A Chain‐Like Structure
Author(s) -
Baies Radu,
Pralong Valérie,
Caignaert Vincent,
Raveau Bernard
Publication year - 2012
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201200101
Subject(s) - manganese , crystallography , octahedron , electron paramagnetic resonance , ionic conductivity , ionic bonding , chemistry , paramagnetism , ab initio , materials science , ion , inorganic chemistry , crystal structure , nuclear magnetic resonance , condensed matter physics , physics , electrolyte , organic chemistry , electrode
A new Mn 3+ hydrogenophosphate LiMn(H 2 P 2 O 7 ) 2 was synthesized, using a soft chemistry method. The ab initio structure resolution of this phase shows that it consists of infinite chains [MnH 4 P 4 O 14 ] ∞ , built up of corner‐sharing MnO 6 octahedra and P 2 O 5 (OH) 2 diphosphate groups. The cohesion between the chains is ensured by Li + cations and hydrogen bonds. This compound is paramagnetic and Mn 3+ is in high spin (H.S.) configuration. The impedance plots show that this hydrogenophosphate is a modest ionic conductor with activation energy of 0.8 eV and a conductivity reaching 10 –6 S · cm –1 at 320 °C.