Search results for "Antimonide"

showing 3 items of 3 documents

New binary antimonide Hf5Sb3

1999

Abstract Hf5Sb3 can be prepared by arc-melting of hafnium and previously synthesized HfSb2. It crystallizes like the high-temperature modification of Zr5Sb3 in the Y5Bi3 structure type, space group Pnma, Z=4, a=740.75(9) pm, b=871.8(1) pm, c=1073.6(1) pm, V=693.3(1) 106pm3. An antimonide analogous to the low-temperature form of Zr5Sb3 was not obtained during our investigations. In the structure of Hf5Sb3, the Hf atoms form a three-dimensional network with numerous short Hf–Hf contacts, including the Sb atoms in severely distorted two- and three-capped trigonal prismatic voids. Calculations of the electronic structure, performed with the extended Huckel approximation as well as the TB-LMTO-A…

ChemistryStereochemistryMechanical EngineeringMetals and Alloyschemistry.chemical_elementElectronic structureCrystal structureTrigonal prismatic molecular geometryHafniumCrystallographyTight bindingMechanics of MaterialsGroup (periodic table)AntimonideMaterials ChemistryElectronic band structureJournal of Alloys and Compounds
researchProduct

Numerical study on localized defect modes in two-dimensional lattices: a high Q-resonant cavity

2003

Abstract The spectral widths and the quality factors of defect modes localized for different defects structures formed in a 2D photonic crystal composed of a square lattice of circular rods of indium antimonide (InSb) are theoretically investigated. It is first shown that some factors such as the lattice nature, the line defect orientation, the nature and the defect width have a significant influence on the optical properties of the studied structures and can improve the Q factor and defect peak transmission intensity. Particularly, the transmission spectra of the defects calculated by means the transfer-matrix-method for a particular structure of eight line defects introduced in its center…

FabricationMaterials scienceCondensed matter physicsbusiness.industryIndium antimonideCondensed Matter PhysicsSquare latticeSpectral lineRodElectronic Optical and Magnetic Materialschemistry.chemical_compoundOpticschemistryQ factorLattice (order)Electrical and Electronic EngineeringbusinessPhotonic crystalPhysica B: Condensed Matter
researchProduct

ChemInform Abstract: New Binary Antimonide Hf5Sb3 - Differences and Similarities to the Zr Antimonides.

2010

Abstract Hf5Sb3 can be prepared by arc-melting of hafnium and previously synthesized HfSb2. It crystallizes like the high-temperature modification of Zr5Sb3 in the Y5Bi3 structure type, space group Pnma, Z=4, a=740.75(9) pm, b=871.8(1) pm, c=1073.6(1) pm, V=693.3(1) 106pm3. An antimonide analogous to the low-temperature form of Zr5Sb3 was not obtained during our investigations. In the structure of Hf5Sb3, the Hf atoms form a three-dimensional network with numerous short Hf–Hf contacts, including the Sb atoms in severely distorted two- and three-capped trigonal prismatic voids. Calculations of the electronic structure, performed with the extended Huckel approximation as well as the TB-LMTO-A…

chemistry.chemical_elementBinary numberGeneral MedicineElectronic structureStructure typeTrigonal prismatic molecular geometryHafniumMetalCrystallographychemistryGroup (periodic table)visual_artAntimonidevisual_art.visual_art_mediumChemInform
researchProduct