The crystal structure of Cu₃PSe₄ and other ternary normal tetrahedral structure compounds with composition 1₃56₄

Refinement of the crystal structures of Cu3PS4and Cu3SbS4and a comment on normal tetrahedral structures

“…They are isotypic either with the mineral enargite Cu 3 AsS 4 or the mineral famatinite Cu 3 SbS 4 . Cu 3 PS 4 , Cu 3 PSe 4 , Cu 3 AsS 4 , and Cu 3 AsSe 4 are reported to crystallize in the wurtzite related enargite structure type [1][2][3][4][5]. The structure of Cu 3 PS 4 was yet only refined from film data [1].…”

“…The structure of Cu 3 PS 4 was yet only refined from film data [1]. Cu 3 SbS 4 and Cu 3 SbSe 4 prefer the sphalerite related famatinite structure type [2,6,7]. From electron diffraction data it was concluded that Cu 3 SbS 4 is cubic with a cell volume of V cub ¼ 4 Á V tet [8].…”

Investigation of longitudinal 31P relaxation in metal selenophosphate compounds

“…Ag 4 P 2 Se 6 [20], Pb 2 P 2 Se 6 [21], and Cu 3 PSe 4 [22] were prepared by reacting stoichiometric amounts of the metal (Ag, Pb, Cu) with P 2 Se 5 and elemental Se. The reaction took place in an evacuated quartz tube at 600 C for 1 day followed by a cool-down to 50 C over 12 h.…”

“…In Eq. (2), r P-P and r P-I are internuclear distances determined from crystal structures [20][21][22][23][24][25][26], J represents one of the isotopes of element I, B J is its fractional natural abundance, S J is its spin quantum number, and g P and g J are the averaging. In addition, this model: (1) neglects the multiple magnitudes of azimuthal quantum numbers for quadrupolar spins and the resulting multiplicity of dipolar matrix elements; and (2) assumes that all compounds have similar ranges of motional correlation times.…”

Preparation and Phase Relations in the CuSbSe2– CuInSe2System

“…One more compound of the Cu-Sb-Se systemCu 3 SbSe 4 -was first synthesized separately [9] and its phase diagram indicates that this material forms via a peritectic reaction at about 663 K [7]. Its crystal structure was also established [10,11]. Recently, in addition to CuSbSe 2 , Cu 3 SbSe 3 , and Cu 3 SbSe 4 compounds, prediction of the new stable, previously unknown in the Cu-Sb-Se system, compounds Cu 4 SbSe 5 and Cu 12 Sb 4 Se 13 , was made [12].…”