La2MoO6 Oxymolybdates Doped with Sodium: Crystal Growth, Features of the Structure, and Properties

2021 ◽  
Author(s):  
Ekaterina Orlova ◽  
Sergei Chernyak ◽  
Elena Kharitonova ◽  
Nikolay Lyskov ◽  
Timofei Sorokin ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Structure And Properties ◽  
Growth Features

Sector growth and symmetry of (F,OH) apatite from the Asio mine, Japan

1994 ◽  
Vol 58 (391) ◽  
pp. 307-314 ◽  
Author(s):  
Mizuhiko Akizuki ◽  
Hirotugu Nisidoh ◽  
Yasuhiro Kudoh ◽  
Tomohiro Watanabe ◽  
Kazuo Kurata
Keyword(s):  
Optical Properties ◽  
Crystal Growth ◽  
Electron Diffraction ◽  
Chemical Analysis ◽  
Growth Surface ◽  
Complete Disappearance ◽  
X Ray ◽  
Solid Crystal ◽  
Wet Chemical ◽  
Growth Features

AbstractA study of apatite crystals from the Asio mine, Japan, showed sectoral texture related to the growth of the crystal, and with optically biaxial properties within the sectors. Wet chemical analysis gave a composition Ca5(PO4)3(F0.64,OH0.38,Cl0.01)1.03 for the specimen.Additional diffraction spots were not observed in precession and oscillation X-ray photographs and electron diffraction photographs. Since the internal textures correlate with the surface growth features, it is suggested that the internal textures and the unusual optical properties were produced during nonequilibrium crystal growth. The fluorine/hydroxyl sites in hexagonal apatite are symmetrically equivalent in the solid crystal but, at a growth surface, this equivalence may be lost, resulting in a reduction of crystal symmetry. Heating of the apatite to about 850°C results in the almost complete disappearance of the optical anomalies due to disordering, which may be related to the loss of hydroxyl from the crystal.

ChemInform Abstract: Tl4Re6X12 (X: S, Se): Crystal Growth, Structure, and Properties.

ChemInform ◽  
1989 ◽  
Vol 20 (40) ◽  
Author(s):  
G. HUAN ◽  
M. GREANEY ◽  
P. P. TSAI ◽  
M. GREENBLATT
Keyword(s):  
Crystal Growth ◽  
Structure And Properties ◽  
Growth Structure

Magnetoelectric (Bi, Ln)Feo3compounds: Crystal growth, structure and properties

1994 ◽  
Vol 162 (1) ◽  
pp. 11-21 ◽  
Author(s):  
V. A. Murashov ◽  
D. N. Rakov ◽  
V. M. Ionov ◽  
I. S. Dubenko ◽  
Y. V. Titov ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Structure And Properties ◽  
Growth Structure

Holmium polysulfides: crystal growth, structure and properties

2001 ◽  
Vol 323-324 ◽  
pp. 26-33 ◽  
Author(s):  
S.V Belaya ◽  
I.G Vasilyeva ◽  
N.V Pervukhina ◽  
N.V Podberezskaya ◽  
A.P Eliseev
Keyword(s):  
Crystal Growth ◽  
Structure And Properties ◽  
Growth Structure

Growth of monocrystals of germanium from an undercooled melt

1955 ◽  
Vol 229 (1178) ◽  
pp. 346-363 ◽  
Keyword(s):  
Crystal Growth ◽  
Phase Contrast ◽  
Crystal Surfaces ◽  
Cubic Symmetry ◽  
X Ray ◽  
Fine Focus ◽  
Undercooled Melt ◽  
Electron Microscopes ◽  
Growth Features ◽  
High Degree

Dissipation of latent heat being the main rate-controlling factor in crystal growth from the melt, a novel technique has been developed for the rapid growth of monocrystals of germanium and other materials with the diamond or zincblende structure. By dipping a properly orientated seed crystal into an under-cooled melt and withdrawing it at the same rate as it grows, monocrystals of indefinite length can be obtained with various shapes which are under reasonable control; in particular, crystals can be grown in the form of thin lamellae, demonstrating in a striking fashion that even in an isotropic medium of cubic symmetry, crystal growth can take place by the deposition of individual layers orientated along the close-packed {111} planes. Further evidence for growth by layer formation is deduced from etch experiments. The surfaces of some of these crystals have a high degree of perfection. Crystal surfaces as grown, and also after having been etched, have been examined in detail under the optical, phase-contrast and electron microscopes, as well as with a fine-focus X-ray beam; certain growth features are discussed and a possible mechanism is suggested for dendritic growth.

scholarly journals Some Crystal Growth Features of Sea Ice

1963 ◽  
Vol 4 (36) ◽  
pp. 669-688 ◽  
Author(s):  
Kenneth O. Bennington
Keyword(s):  
Crystal Growth ◽  
Sea Ice ◽  
Sea Water ◽  
Cell Structure ◽  
Liquid System ◽  
Laboratory Studies ◽  
Drainage Channels ◽  
Water Test ◽  
Growth Features

AbstractLaboratory studies of the supercooling and freezing of baths of sea-water are described and compared with features of natural sea ice. By using dyes the convection cells in the sea-water test baths could be studied. and the growth of crystals relative to this cell structure could be observed. Brine expelled by the separation of ice from the system commonly followed the pre-existing convection channels. Sections of sea ice are interpreted in the light of these observations, and sea ice is shown to inherit drainage channels and banding features from the characteristics of the parent liquid system.

Rhenium chalcogenides Tl4Re6X12 (X = S, Se): crystal growth, structure and properties

1989 ◽  
Vol 28 (12) ◽  
pp. 2448-2451 ◽  
Author(s):  
G. Huan ◽  
M. Greaney ◽  
P. P. Tsai ◽  
M. Greenblatt
Keyword(s):  
Crystal Growth ◽  
Structure And Properties ◽  
Growth Structure
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