Crystal Structures of N(6),N(6)-Dimethyladeninium Bisulfate and N(6)-Methyladeninium Hemisulfate Dihydrate.

The crystal structure of guanosine dihydrate and inosine dihydrate.

Crystals of the dihydrates of guanosine (C10H13NsOs) and inosine (C10H12N405) are nearly isostructural. They are monoclinic, space group P21, with cell dimensions a= 17·518, b= 11 ·502, c= 6·658 A, P=98·17° (guanosine) and a=17·573, b=11·278, c=6-654A, P=98·23° (inosine). There are two nucleoside molecules and four water molecules per asymmetric unit. Data were collected on an automated diffrac...

Temperature Tunability of Dielectric/ Liquid Crystal / Dielectric Photonic Crystal Structures

Recently, photonic crystals doped with liquid crystal (LC) material havegained much research interest. In this article new ternary one-dimensional photoniccrystal introduced and studied. The liquid crystal layer of 5CB and 5PCH is sandwichedby two dielectric layers. For the first time, we use four structures SiO2/UCF35/CaF2,SiO2/5CB/CaF2, NFK51/UCF35/NPSK53 and NFK51/5CB/NPSK53. The effect ofte...

Crystal structures of deuterated sodium molybdate dihydrate and sodium tungstate dihydrate from time-of-flight neutron powder diffraction

Time-of-flight neutron powder diffraction data have been measured from ∼90 mol% deuterated isotopologues of Na2MoO4·2H2O and Na2WO4·2H2O at 295 K to a resolution of sin (θ)/λ = 0.77 Å(-1). The use of neutrons has allowed refinement of structural parameters with a precision that varies by a factor of two from the heaviest to the lightest atoms; this contrasts with the X-ray based refinements whe...

Pseudotumoral presentation of calcium pyrophosphate dihydrate crystal

COMPLEXES OF LEAD (II)*: CRYSTAL STRUCTURES OF L2Pb (NO,), AND L2Pb(SCN), L=Z(AMINOMETHYL) PYRIDINE

The reactions of Pb(N0 ) and Pb(SCN)2 with 2-(aminomethy1)pyridine (C H N = L) yielded colourless crystals of L Pb(N0 ) ( I ) and L Pb(SCN) , (2), respectively. Their structures were determined by X-ray crystallography. Crystal data: 1, monoclinic, P2 /c, a = 9.263 (4) ?, b = 7.783 (2) ?, c = 6.692 (3) ?, ? = 101.26 (2)?, Z = 2, Mo K?, 1540 observed (I > 2.5 ?(I) data (22 ? C), R = 0...