Crystal Growth and Structure of a New PbHNSO3 Crystal

Abstract

A new type of PbHNSO 3 crystal has been grown by a gel method using agar-agar gel. TG-DTA and X-ray diffraction measurements have been performed on single crystal samples of PbHNSO 3 . It is found that the thermal decomposition of the compound starts at about 960 K. The space group (orthorhombic Pnma) and structural parameters are determined at room temperature with unit cell dimensions: a=8.4690(6), b=5.3934(4) and c=6.9530(4) Å. The crystal structure is found to consist of NSO 3 pseudo-tetrahedra, PbO 9 N 3 polyhedra, and NSO 3 -Pb-NSO 3 frameworks. The dark brown color of the crystal is suggested to be caused by the absorption of blue wavelengths of light which is due to the excitation of excess electrons in potential wells produced by the NSO 3 -Pb-NSO 3 framework.

New alkaline-earth amidosulfates and their unexpected decomposition to S4N4

“…30,32,36,40,48 Surprisingly, to the best of our knowledge, no second-harmonic generation measurement has been published on any metal amidosulphate compound as yet. Several studies on the thermal decomposition of metal amidosulphates suggested a quite complex decomposition pattern, 22,47,52 in parts involving condensation reactions to imidodisulphates, which is a first indication that such species might be suitable precursors to sulphur nitrides.…”

“…Though dibasic imidosulphate [NHSO 3 ] 2− anions 22,23 and tribasic nitridosulphate [NSO 3 ] 3− anions [24][25][26] have been occasionally encountered, most of the studies on the crystal structures of the metal salts of amidosulphuric acid feature monobasic amidosulphate [NH 2 SO 3 ] − anions. For monovalent ions, besides the double salts MLi(NH 2 SO 3 ) 2 (M = K, Rb, and Cs), 27 amidosulphates of the alkali metal ions Li + to Cs + , [28][29][30][31][32][33][34][35][36][37] the pseudo-alkali cations ammonium, Ag + and Tl + have been structurally characterised.…”