Redetermination of the crystal structures of nickel cyclotetraphosphate, Ni2P4O12 and of cobalt cyclotetraphosphate, CO2P4O12

Abstract

Nickel cyclotetraphospfaate, NÌ2P4O12Source of material: A mixture of phosphorus acid, phosphorus pentoxide and nickel oxide was heated to 605 K. The melt was kept at that temperature for about 7 days. Green and prism-shaped crystals were formed. The title compound has been reported by Anders G. Nord in 1983 (see ref. 1) based on powder diffraction data. The structure of NÌ2P4O12 is isomorphous to Zn-, Co-, Fe-, Mg-, Cu-, Μη-and Cd-cyclotetraphosphates.

Interaction in the systems M^II<inf>2</inf>P<inf>4</inf>O<inf>12</inf>-M^ICl(M^INO<inf>3</inf>) (M^I - Li, Na, K; M^II - Co, Ni)

“…Results of electronic spectroscopy for obtained phosphates M12P4012 and MMlp04 indicate that Ml have different oxygen environment, they form Ml06 and Ml04-polyhedra, respectively. This fact is in according with literature data about structure of these compounds [5][6].…”

Self-Assembled MoOx@Co2P4O12 as an Ideal Bifunctional Catalyst for Overall Water Splitting

“…This XRD results match well with the standard pdf (JCPDS no.84.2208). 31 The low peak strength in the figure is due to the low crystallinity of Co 2 P 4 O 12 . The above characterization proved that pure Co 2 P 4 O 12 was synthesized.…”

Scalable Two-Step Synthesis of Nickel–Iron Phosphide Electrodes for Stable and Efficient Electrocatalytic Hydrogen Evolution

“…XRD patterns of freshly prepared (a) 5Ni–P, (b) 4Ni–1Fe–P, (c) 3Ni–2Fe–P, (d) 2Ni–3Fe–P, (e) 1Ni–4Fe–P, and (f) 5Fe–P. Reference patterns of (g) Ni 2 P, (h) Ni 5 P 4 , (i) FeP, (j) γ-Fe 2 O 3 , (k) α-Fe 2 O 3 , (l) Ni­(PO 3 ) 2 , and (m) Fe 3 (PO 4 ) 2 ·4H 2 O also are shown, and the corresponding peaks are labeled as N a , N b , F, ∧, “, #, and + in (a)–(f) . Asterisk (*) indicates the peak attributed to Ti foil.…”