In:
Angewandte Chemie, Wiley, Vol. 128, No. 48 ( 2016-11-21), p. 15277-15281
Abstract:
Titanium(III) phosphate, TiPO 4 , is a typical example of an oxyphosphorus compound containing covalent P−O bonds. Single‐crystal X‐ray diffraction studies of TiPO 4 reveal complex and unexpected structural and chemical behavior as a function of pressure at room temperature. A series of phase transitions lead to the high‐pressure phase V, which is stable above 46 GPa and features an unusual oxygen coordination of the phosphorus atoms. TiPO 4 ‐V is the first inorganic phosphorus‐containing compound that exhibits fivefold coordination with oxygen. Up to the highest studied pressure of 56 GPa, TiPO 4 ‐V coexists with TiPO 4 ‐IV, which is less dense and might be kinetically stabilized. Above a pressure of about 6 GPa, TiPO 4 ‐II is found to be an incommensurately modulated phase whereas a lock‐in transition at about 7 GPa leads to TiPO 4 ‐III with a fourfold superstructure compared to the structure of TiPO 4 ‐I at ambient conditions. TiPO 4 ‐II and TiPO 4 ‐III are similar to the corresponding low‐temperature incommensurate and commensurate magnetic phases and reflect the strong pressure dependence of the spin‐Peierls interactions.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v128.48
DOI:
10.1002/ange.201608530
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
505868-5
detail.hit.zdb_id:
506609-8
detail.hit.zdb_id:
514305-6
detail.hit.zdb_id:
505872-7
detail.hit.zdb_id:
1479266-7
detail.hit.zdb_id:
505867-3
detail.hit.zdb_id:
506259-7
Permalink