14215-29-3Relevant articles and documents
CdP2N4 and MnP2N4 - Ternary Transition-Metal Nitridophosphates
Pucher, Florian J.,Karau, Friedrich W.,Schmedt Auf Der Günne, J?rn,Schnick, Wolfgang
, p. 1497 - 1502 (2016)
The ternary transition-metal nitridophosphates CdP2N4 and MnP2N4 have been synthesized under high-pressure higherature conditions (5-8 GPa, 1000-1300°C) by using the multianvil technique. Cd and Mn azides can be used as the starting materials, however, with respect to safety considerations, it is much more advantageous to start from metal powders and phosphorus nitride imide, HPN2. Both nitridophosphates crystallize in a structure closely related to the megacalsilite structure type. As a result of the known issues concerning superstructures with this type of structure, TEM investigations were performed on CdP2N4, which revealed that the megacalsilite superstructure is not equally pronounced in all crystallites. By adding NH4Cl as mineralizer, single crystals were obtained that exhibit unequally pronounced superstructure reflections. Consequently, an averaged structural model was used and refined by the Rietveld method [P6322, a = 16.7197(3), c = 7.6428(2) ?, V = 1850.3(2) ?3, Rp = 0.0671, wRp = 0.0869 for CdP2N4 and P6322, a = 16.5543(2), c = 7.5058(2) ?, V = 1781.3(1) ?3, Rp = 0.0526, wRp = 0.0697 for MnP2N4]. The 31P NMR spectra exhibit four signal groups at (6.4, 4.8), 0.8, and -9.7 ppm with pronounced shoulders belonging to the same phase in an approximate area ratio of 4.8:1.1:2.0, thereby proving at least eight P sites.
Azides and Cyanamides - Similar and Yet Different
Reckeweg, Olaf,Simon, Arndt
, p. 1097 - 1104 (2003)
The crystal structures of LiN3*;H2O (P6 3/mcm (No. 193), Z = 6; 924.01(13); 560.06(7) pm); NH 4N3 (Pmna (No. 53), Z = 4; a = 889.78(18), b = 380,67(8), c = 867.35(17) pm); Ca(N3)2 (Fddd (No. 70), Z = 8; a = 595.4(2), b = 1103.6(5), c = 1133.1(6) pm), Sr(N3)2 (Fddd(No. 70), Z = 8; a = 612.02(9), 6 = 1154.60(18), c = 1182.62(15) pm); Ba(N3)2 (P21/m (No. 11), Z = 2; a = 544.8(1), b = 439.9(1), c = 961.3(2) pm, β = 99.64(3)°) and TIN3 (I4/mcm (No. 140), Z = 2; 618.96(9); 732.71(15) pm) have been either determined for the first time or redetermined by X-ray diffraction on single crystals. The afore mentioned compounds, AN3 (A = Na, K, Rb, Cs), M(N 3)2 · 2.5 H2O (M = Mg, Zn) and the cyanamides Li2CN2, CdCN2 and CuCN2 were investigated by Raman and IR spectroscopy (KBr technique). Structural features and spectroscopic data of azides and cyanamides from this work and from literature are listed and compared.
