Results 271 to 280 of about 14,400,955 (339)

Crystal structure of “hexagonal” MoO3

Reaction Kinetics and Catalysis Letters, 1981
X-ray powder diffraction analysis of the crystal structure of hexagonal MoO3 indicates that this structure is observed for AxMexMoX-xO3 compounds, where A=NH4, K, Rb, Cs, Me=V, P, Sn, Ti, Zr, Si.
I. P. Olenkova, L. M. Plyasova, S. D. Kirik   +2 more
openaire   +1 more source

Crystal Structure Determination. II: Hexagonal Structures

1998
To index the x-ray diffraction pattern and calculate the lattice parameters of some common materials with a hexagonal structure.
C. Suryanarayana, M. Grant Norton
openaire   +1 more source

Surface oxygen vacancy defect-promoted electron-hole separation for porous defective ZnO hexagonal plates and enhanced solar-driven photocatalytic performance

, 2020
Porous defective ZnO cellular hexagonal plates with surface oxygen vacancies (OVZCHPs) are fabricated by hydrothermal and high-temperature NaBH4 reduction methods.
Yachao Xu, Haozhe Li, Bojing Sun, Panzhe Qiao, Liping Ren, Guohui Tian, Baojiang Jiang, K. Pan, W. Zhou   +8 more
semanticscholar   +1 more source

Hexagonal structures at lens capsule zonular attachments

Japanese Journal of Ophthalmology, 1997
Two years after uneventful phacoemulsification with posterior intraocular lens implant in an 84-year-old female patient, the capsular bag and enclosed intraocular lens luxated into the vitreous cavity. A vitrectomy was done to extract the lens and capsule for electron-microscopic examination.
H, Aonuma, H, Matsushita, K, Nakajima, K, Tsushima, M, Ueno, T, Nagata   +5 more
openaire   +2 more sources

Discovery of Hexagonal Structured Pd–B Nanocrystals

Angewandte Chemie, 2017
AbstractWe report on hexagonal close‐packed (hcp) palladium (Pd)–boron (B) nanocrystals (NCs) by heavy B doping into face‐centered cubic (fcc) Pd NCs. Scanning transmission electron microscopy–electron energy loss spectroscopy and synchrotron powder X‐ray diffraction measurements demonstrated that the B atoms are homogeneously distributed inside the ...
Keigo Kobayashi, Hirokazu Kobayashi, Mitsuhiko Maesato, Mikihiro Hayashi, Tomokazu Yamamoto, Satoru Yoshioka, Syo Matsumura, Takeharu Sugiyama, Shogo Kawaguchi, Yoshiki Kubota, Hiroshi Nakanishi, Hiroshi Kitagawa   +11 more
openaire   +2 more sources

Crystal structure of hexagonal polyselenomethylene

Journal of Polymer Science Part A: General Papers, 1965
AbstractThe crystal structure of hexagonal polyselenomethylene is described. It has a hexagonal unit cell with a = 5.22 A. and c = 46.25 A. The polymer chains are helices with the helix axis parallel to c. In the identity period of 46.25 A., there are 21 CH2Se units and 11 turns of the helix.
G. Carazzolo, G. Valle
openaire   +1 more source

Cardiolipin forms hexagonal structures with divalent cations

Biochimica et Biophysica Acta (BBA) - Biomembranes, 1972
Abstract The structures formed by precipitating acidic phospholipids, particularly cardiolipin, with divalent ions are described, with their structural dimensions. Ca2+, Mg2+ and Ba2+ form hexagonal phases with cardiolipin, the phase being of the H11 type with water cylinders packed hexagonally in a hydrocarbon matrix.
R P, Rand, S, Sengupta
openaire   +2 more sources

The Crystal Structure of Hexagonal Barium Titanate

The Journal of Chemical Physics, 1948
The crystal structure of hexagonal barium titanate has been determined by X-ray methods. The unit cell, which contains six units of BaTiO3, has a0 = 5.735 A. and c0 = 14.05 A. In the space group C63/mmc all the ions occur at special positions: 2 Ba at (b), 4 Ba at (f), 2 Ti at (a), 4 Ti at (f), 6 O at (h), and 12 O at (k).
R. D. Burbank, H. T. Evans
openaire   +1 more source

The Electronic Structure of Hexagonal BaCoO3

Journal of Solid State Chemistry, 1999
Abstract TB–LMTO–ASA band structure calculations within the local spin density approximation have been performed to explain the magnetic and transport properties of BaCoO3. The calculations predict a magnetic and metallic ground state as energetically favored. BaCoO3 shows no long-range magnetic ordering, however, and only poor conductivity.
Felser, C., Yamaura, K., Cava, R.
openaire   +2 more sources

Clar structures vs Fries structures in hexagonal systems

Applied Mathematics and Computation, 2018
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Shaohui Zhai, Dalal Alrowaili, Dong Ye
openaire   +2 more sources