PMID- 24454150
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20140123
LR  - 20211021
IS  - 1600-5368 (Print)
IS  - 1600-5368 (Electronic)
IS  - 1600-5368 (Linking)
VI  - 69
IP  - Pt 12
DP  - 2013 Nov 30
TI  - Na3Co2(As0.52P0.48)O4(As0.95P0.05)2O7.
PG  - i85-i86
LID - 10.1107/S1600536813032029 [doi]
AB  - The title compound, trisodium dicobalt(II) (arsenate/phosphate) 
      (diarsenate/diphosphate), was prepared by a solid-state reaction. It is 
      isostructural with Na3Co2AsO4As2O7. The framework shows the presence of CoX22O12 
      (X2 is statistically disordered with As0.95P0.05) units formed by sharing corners 
      between Co1O6 octa-hedra and X22O7 groups. These units form layers perpendicular 
      to [010]. Co2O6 octa-hedra and X1O4 (X1 = As0.54P0.46) tetra-hedra form Co2X1O8 
      chains parallel to [001]. Cohesion between layers and chains is ensured by the 
      X22O7 groups, giving rise to a three-dimensional framework with broad tunnels, 
      running along the a- and c-axis directions, in which the Na(+) ions reside. The 
      two Co(2+) cations, the X1 site and three of the seven O atoms lie on special 
      positions, with site symmetries 2 and m for the Co, m for the X1, and 2 and m (x 
      2) for the O sites. One of two Na atoms is disordered over three special 
      positions [occupancy ratios 0.877 (10):0.110 (13):0.066 (9)] and the other is in 
      a general position with full occupancy. A comparison between structures such as 
      K2CdP2O7, alpha-NaTiP2O7 and K2MoO2P2O7 is made. The proposed structural model is 
      supported by charge-distribution (CHARDI) analysis and bond-valence-sum (BVS) 
      calculations. The distortion of the coordination polyhedra is analyzed by means 
      of the effective coordination number.
FAU - Ben Smida, Youssef
AU  - Ben Smida Y
AD  - Laboratoire de Materiaux et Cristallochimie, Faculte des Sciences de Tunis, 
      Universite de Tunis ElManar, 2092 Manar II Tunis, Tunisia.
FAU - Guesmi, Abderrahmen
AU  - Guesmi A
AD  - Laboratoire de Materiaux et Cristallochimie, Faculte des Sciences de Tunis, 
      Universite de Tunis ElManar, 2092 Manar II Tunis, Tunisia.
FAU - Zid, Mohamed Faouzi
AU  - Zid MF
AD  - Laboratoire de Materiaux et Cristallochimie, Faculte des Sciences de Tunis, 
      Universite de Tunis ElManar, 2092 Manar II Tunis, Tunisia.
FAU - Driss, Ahmed
AU  - Driss A
AD  - Laboratoire de Materiaux et Cristallochimie, Faculte des Sciences de Tunis, 
      Universite de Tunis ElManar, 2092 Manar II Tunis, Tunisia.
LA  - eng
PT  - Journal Article
DEP - 20131130
PL  - United States
TA  - Acta Crystallogr Sect E Struct Rep Online
JT  - Acta crystallographica. Section E, Structure reports online
JID - 101089178
PMC - PMC3884975
EDAT- 2014/01/24 06:00
MHDA- 2014/01/24 06:01
PMCR- 2013/11/30
CRDT- 2014/01/24 06:00
PHST- 2013/11/15 00:00 [received]
PHST- 2013/11/23 00:00 [accepted]
PHST- 2014/01/24 06:00 [entrez]
PHST- 2014/01/24 06:00 [pubmed]
PHST- 2014/01/24 06:01 [medline]
PHST- 2013/11/30 00:00 [pmc-release]
AID - br2232 [pii]
AID - 10.1107/S1600536813032029 [doi]
PST - epublish
SO  - Acta Crystallogr Sect E Struct Rep Online. 2013 Nov 30;69(Pt 12):i85-i86. doi: 
      10.1107/S1600536813032029. eCollection 2013 Nov 30.