Optical crystallographic study of piezoelectric KxNa1−xNbO3 (x = 0.4, 0.5 and 0.6) single crystals using linear birefringence

CrystEngComm ◽  
2013 ◽  
Vol 15 (34) ◽  
pp. 6790 ◽  
Author(s):  
Shashaank Gupta ◽  
Steven Huband ◽  
Dean S. Keeble ◽  
David Walker ◽  
Pam Thomas ◽  
...  
Keyword(s):  
Single Crystals ◽  
Linear Birefringence ◽  
Crystallographic Study

Structural Characterization of N,NBis( diphenylphosphanyl)propylamine

2012 ◽  
Vol 67 (5) ◽  
pp. 504-506 ◽  
Author(s):  
Tobias Mayer ◽  
Hans-Christian Böttcher
Keyword(s):  
Single Crystals ◽  
Structural Characterization ◽  
Crystallographic Study

The synthesis and structural characterization of the Nsubstituted bis(diphenylphosphanyl)amine Ph2PN(R)PPh2 (R = n-propyl, 1) is reported. Single crystals of 1grown from dichloromethane/acetonitrile have been analyzed by Xray crystallography. The crystallographic study revealed that the diphenylphosphanyl groups in 1are staggered relative to the PNP backbone as observed for other closely related molecules.

Crystallization and preliminary crystallographic study of triple-helical DNA

2000 ◽  
Vol 56 (1) ◽  
pp. 104-105 ◽  
Author(s):  
Zong-Jin Han ◽  
Sangkee Rhee ◽  
Keliang Liu ◽  
H. Todd Miles ◽  
David R. Davies
Keyword(s):  
Single Crystals ◽  
Unit Cell ◽  
The Other ◽  
Diffusion Method ◽  
Triplex Dna ◽  
Asymmetric Unit ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Crystallographic Study

Single crystals of d(CTCCTSCCGCGCG)·d(CGCGCGGAG) have been grown by the vapor-diffusion method using 2-methyl-2,4-pentanediol as a precipitant. The crystals are tetragonal, space group P42, with unit-cell parameters a = b = 53.8, c = 43.1 Å, and diffract to 1.8 Å resolution at a synchrotron X-ray beamline. In the crystal, the asymmetric unit contains one copy of the construct. The two halves of the structure are related by non-crystallographic twofold symmetry. These observations are consistent with the conclusion that the sequences of the 12-mer and 9-mer oligonucleotides form a duplex DNA at one end and a triplex DNA at the other end.

The Microstructure of Shock-Synthesized Diamond

1967 ◽  
Vol 25 ◽  
pp. 324-325
Author(s):  
Lucien F. Trueb
Keyword(s):  
Single Crystals ◽  
Preferred Orientation ◽  
High Magnification ◽  
Texture Pattern ◽  
Shock Process ◽  
New Type ◽  
Diffraction Diagram

A new type of synthetic industrial diamond formed by an explosive shock process has been recently developed by the Du Pont Company. This material consists of a mixture of two basically different forms, as shown in Figure 1: relatively flat and compact aggregates of acicular crystallites, and single crystals in the form of irregular polyhedra with straight edges.Figure 2 is a high magnification micrograph typical for the fibrous aggregates; it shows that they are composed of bundles of crystallites 0.05-0.3 μ long and 0.02 μ. wide. The selected area diffraction diagram (insert in Figure 2) consists of a weak polycrystalline ring pattern and a strong texture pattern with arc reflections. The latter results from crystals having preferred orientation, which shows that in a given particle most fibrils have a similar orientation.

Sign in / Sign up

Export Citation Format

Share Document