For the X-ray diffraction analysis, a small quantity of the sample, cut from the ingot, was ground mechanically in an agate mortar and pestle.
Science bringing nations together
The resulting fine powder was mounted on a flat zerobackground holder covered with a thin layer of petroleum jelly. A fixed aperture and divergence slit of 1 mm, a 1 mm monochromator slit, and a 0. Quartz was used as an external standard. The Bruker AXS analytical software was used to establish the positions of the peaks.
- End walls in place for Chernobyl cover!
- Grown-ups Cant Be Friends With Dragons.
- Celestial Spheres!
- Prince William: Born to be King: An intimate portrait.
Figure 1 shows the resulting powder X-ray diffractogram for Cu 3 In 7 Te The 20 first peak positions were indexed using the program Dicvol04 [ 16 ], which gave a unique solution in a tetragonal cell. A revision of the diffraction lines, taking into account the sample composition, unit cell parameters, and lattice-type, suggests that this material is isostructural with Cu 3 In 7 Se The Rietveld refinement [ 19 ] of the whole diffraction pattern was carried out using the Fullprof program [ 20 , 21 ], with the unit cell parameters found in the indexing.
Peak shapes were described by the parameterized Thompson-Cox-Hastings pseudo-Voigt profile function [ 23 ]. The background variation was described by a polynomial with six coefficients. The thermal motion of the atoms was described by one overall isotropic temperature factor. The results of the Rietveld refinement are summarized in Table 1.
- Computer, Network, Software, and Hardware Engineering with Applications.
- Uranium dioxide - Wikipedia!
- Uranium dioxide;
- Current Models of the Nucleus?
- Computer, Network, Software, and Hardware Engineering with Applications?
- A Profile Refinement Method for Nuclear and Magnetic Structures.
Figure 1 shows the observed, calculated, and difference profile for the final cycle of refinement. Atomic coordinates, isotropic temperature factor, bond distances, and angles are shown in Table 2. The lower trace is the difference curve between observed and calculated patterns.
The Bragg reflections are indicated by vertical bars. Bond valence sum BVS are also showed.
From refinement by the Rietveld method by using powder X-ray diffraction data, it has been found that this material crystallizes in the tetragonal space group P 4 2 c , with a chalcopyrite-related structure. This consists of a three-dimensional arrangement of distorted CuTe 4 and InTe 4 tetrahedra connected by common faces. In this structure, each Te atom is coordinated by four cations one Cu and three In located at the corners of a slightly distorted tetrahedron. In the same way, each cation is tetrahedrally bonded to four anions.
The mass of neutron is slightly over 1 amu.
The atom is electrically neutral since it consists of the same number of electron and proton. Electron, proton, neutron all have half spin. Hydrogen-1 nuclide has only one proton as its nucleus. Beside the hydrogen-1, all other nucleus must consist of both proton and neutron.
Smart tech propels Germany's switch to renewables
The elements differ from each other in the number of protons. Inside the nucleus, the protons and neutrons act like a unit cube which stack together to form the nucleus: the neutron form the kernel of the nucleus whiles the proton is located on the surface of nucleus. The nuclide is characterized by the number of proton, the number of neutron, and the nuclear spin of the nucleus. Nuclear Isotopes are nuclides with equal proton number but different neutron numbers.
Nuclear isotones are nuclides with equal neutron number but different proton numbers. Nuclear isomers are nuclides with equal proton number and equal neutron number, but different nuclear spin.