H2 Na5 O15 P3 V2 Benhamada L, Grandin A, Borel M, Leclaire A, Leblanc M, Raveau B Journal of Solid State Chemistry 96 (1992) 390-396 Na5 V2 P3 O14 . H2 O, a tetravalent vanadium phosphate with alayer structure and a pure pyramidal coordination of V(IV) _cod_database_code 1000472 _database_code_amcsd 0013726 6.3089 20.10379 5.1172 90 91.134 90 Cm atom x y z V1 .5 .15103 .5 P1 -.0030 .1856 .5153 P2 .6507 0 .558 Na1 .832 .0858 .028 Na2 .2546 .2401 -.004 Na3 .179 0 .614 O1 .244 0 .115 O2 -.015 .1887 .224 O3 .501 .1542 .210 O4 .196 .1476 .622 O5 .502 .2441 .644 O6 .803 .1492 .634 O7 .503 .0599 .632 O8 .847 0 .734 O9 .699 0 .273