Newsletter

search results

results of search on CRYSTALLOGRAPHY JOURNALS ONLINE

119 citations found for Glazer, A.M.

There are 121 articles by Glazer, A. click here to see these.

Search for Glazer, A.M. in the World Directory of Crystallographers

Select bibliographic records for downloading using the checkboxes or select all button

Results 1 to 20, sorted by name:


Download citation
Download citation


Download citation
Download citation


Download citation
Download citation

link to html
Measurements of lattice parameters and intensities of difference reflexions have been made for all compositions of Nal - xKxNbO3, both at room temperature and above. Structural models are proposed for each phase found.


Download citation
Download citation

link to html
A low-temperature attachment for Weissenberg cameras operating in the range 10-300 K is described. It consists of an Oxford Instruments continuous-flow helium cryostat and a laboratory-built microprocessor-based temperature controller. The temperature stability and accuracy of the controller are both to better than ±0.1 K over the entire range of operation. Helium consumption is 0.2 l h-1 at 200 K, 0.3 l h-1 at 100 K, 0.65 l h-1 at 30 K and 1.5 l h-1 at 10 K. Slight modifications to the Weissenberg camera enable it to be operated in a continuous-recording mode, in which a series of oscillation photographs may be taken at different temperatures. The very sophisticated temperature programming system allows complex experiments of this type to be carried out automatically, requiring no intervention by the operator.

Download citation
Download citation


Download citation
Download citation

link to html
Extensive studies of the projected local structure of PZTmpb by the techniques of high-angle annular dark-field and annular bright-field imaging have revealed displacements on B sites as well as extensive distortions and possibly rotations of the oxygen cages.

Download citation
Download citation

link to html
The reported morphotropic phase boundary of KxNa1 - xNbO3 at x = 0.3 has been studied with powder X-ray and neutron diffraction.

Download citation
Acta Cryst. (1984). A40, C134
Download citation


Download citation
Download citation

link to html
A high-resolution energy-dispersive diffractometer is described, which uses a synchrotron source and a scanning channel-cut silicon crystal. The technique is demonstrated with a powdered sample of BaTiO3 and analysis of the profiles demonstrates the anomalous particle-size effect reported by Anliker, Brugger & Känzig [Helv. Phys. Acta (1954), 27, 99-124].

Download citation
Download citation

link to html
The gyration components of ammonium Rochelle salt are measured using a universal polarimeter. The dispersion of the gyration is given over the wavelength range 350-650 nm.

Download citation
Download citation

link to html
Test experiments were made using the X-ray energy-dispersive method at the storage ring DORIS (Hamburg) working in the single-bunch mode. It is shown that the spectral distribution of the incident beam calculated from the storage-ring parameters is in very good agreement with that derived from measured diffraction patterns of known substances, and thus it can be used for structural studies. This is illustrated with results of profile-fitting refinement applied to urea (CH4N2O) and naphthalene (C10H8). It is also shown that because of an improved detector system and the time structure of the radiation emitted from the storage ring one is able to record 7 × 104 photons per second and obtain reliable patterns in times of the order of 1  s.

Download citation
Download citation

link to html
Time-resolved high-resolution X-ray diffraction has been implemented to investigate how monoclinic distortion in the ferroelectric Na0.5Bi0.5TiO3 responds to an external electric field. The results strongly favour the model of electric-field-induced polarization rotation and predict that even a sub-coercive electric field can change the direction of the spontaneous polarization vector by 30° or more.

Download citation
Acta Cryst. (1996). A52, C324
Download citation


Download citation
Download citation

link to html
The crystal structure of PbO.2B2O3 is described. Optical non-linearity measurements are also presented, which indicate that both phase-matchability and high non-linearity may be achieved by barium doping.

Download citation
Download citation

link to html
Powder neutron diffraction and low-temperature single-crystal X-ray diffraction are used to re-investigate the room-temperature phase of PbZrO3. Evidence is given to show that the oxygen substructure is ordered and forms regular ZrO6 octahedra.

Download citation
Download citation

link to html
Polycrystalline neutron diffraction and low-temperature single crystal X-ray diffraction are used to investigate the room- temperature phase of lead hafnate, PbHfO3. The octahedral distortion and cation shifts arising in this pseudo-cubic perovskite are compared with those of the technologically important material PbZrO3.

Download citation
Download citation

link to html
A continuous nitrogen-flow cooling device, generally applicable to X-ray diffraction studies, is described. The device works in the range 77.4 to 323.0 K with a precision of ±0.1 K and a liquid-nitrogen constant consumption rate of 0.5 l h-1 over the whole temperature range. The supply vessel is unpressurized, so that refilling can be done without any observable influence on the cooling of the sample.

Download citation
Download citation

link to html
The classical polarizability theory of optical activity in crystals is elaborated and a method of calculating rotatory power from crystal structure data is described. By varying the polarizabilities of the atoms within reasonable limits, optical rotatory powers are computed for crystals of [alpha]-quartz, AlPO4, cinnabar, Bi12SiO20, Bi12GeO20, [alpha]-LiIO3, NaClO3 and NaBrO3. In general, the agreement between theory and experiment is excellent. As expected, considerable variability in polarizabilities is required in different structures in order to obtain satisfactory fits to the observed refractive indices and rotatory powers. The orientations of anisotropic polarizability ellipsoids derived in the course of the calculation are compared with those suggested earlier by Glazer & Stadnicka [J. Appl. Cryst. (1986), 19, 108-122].

Download citation
Download citation

link to html
Equation (10) of Devarajan & Glazer [Acta Cryst. (1986). A42, 560-569] appearing on p. 561 should read \alpha _{s}^{-1}{\bf p}_{s} = \Sigma_{s\prime} {\bf p}_{s\prime} \Biggl \{ \Sigma_{l\prime} a({\bf r}_{s}^{l} - {\bf r}^{l\prime}_{s\prime}) \exp [ - i{\bf k}. ({\bf r}_{s}^{l} - {\bf r}_{s\prime}^{l\prime})] \Biggr \}. \eqno (10)

Follow IUCr Journals
Sign up for e-alerts
Follow IUCr on Twitter
Follow us on facebook
Sign up for RSS feeds