G. Sreenivasa Murthy

Structural analysis of BaMg1/3(Ta, Nb)2/3O3 ceramics

X-ray structure analysis of BaMg1/3(Ta,Nbx)2/3O3 ceramics revealed that BaMg1/3Ta2/3O3 (BMT) has an ordered trigonal phase as well as a disordered cubic phase depending on the preparation temperature. Complete ordered phase for BaMg1/3Nb2/3O3 (BMN) has not been observed. The ordering of Mg, Ta and Nb cations has dependence on the size, charge difference and calcination temperature.

Crystal structure of (diphenyl)(morpholino)phosphiniminocyclotrithiazene

AbstractThe title compound (C6H5)2(OC4H8N)P=N−S3N3 crystallizes in the space group

Crystal structure of Ba(Mg1/3Ta2/3)O3 calcinated at 1400°C

P\bar 1

ALKYL PHOSPHAZINES, (C6H5)3PNNC(R1)(R2): [i) R1=CH3; R2=i-Bu AND ii) R1=R2=C6H5CH2]. SYNTHESIS, CONVERSION TO METHYL IODIDE SALT AND SINGLE CRYSTAL X-RAY STRUCTURE OF PHOSPHAZINIUM BROMIDE, [(C6H5)3P[dbnd]N(H)N[dbnd]C(CH3)(i-Bu)]+ Br −

with unit cell parametersa=9.3900(2),b=9.4747(1),c=11.3850(3) Å, α=95.73(4), β=96.85(6), γ=104.26(2)o, and Z=2. The tricoordinated sulfur of the cyclotrithiazene ring deviates from the mean plane of other skeletal atoms by 0.683(4) Å. The angle at this atom is the smallest in the ring and is enclosed by the longest S−N bonds observed in the ring.

Crystal structure analysis of (Morpholino)(Phenyl)(Dicyclohexylamino) phosphiniminocyclotrithiazene

The title compound (OC4H8N)3P=N–S3N3 crystallizes in a monoclinic crystal system with unit cell parameters a = 8.9996(3), b = 17.2895(7), and c = 12.3648(9) Å, β = 90.63(5)°, Z = 4, and space group P21/n. Strikingly the exocylic S1–N4 bond length is 1.545(3) ÅR and is accompanied by the largest angle at P–N4–S1 as 131.2(2)°. The tricoordinated sulfur atom of the cyclotrithiazene ring deviates from the mean plane of other five atoms by 0.654(1) Å.

S-[(Dicyclohexylamino)(phenyl)(1-pyrrolidinyl)phosphinimino]cyclotrithiazene

A new phase of Ba(Mg1/3Ta2/3)O3 has been obtained by calcination at 1400°C. It belongs to the cubicPm3m witha = 4·08840(4)Å and the crystal structure has been found to be the ideal perovskite by the Rietveld method from powder X-ray diffraction data.

An apparatus for low and high temperature optical goniometry of hygroscopic crystals

AbstractThe title compound (C6H12N)Ph2P-N