request of an example of 14mm or 14/mmm structure

Dear colleages: Can any of you send me an example of atomic positions for a tetragonal phase (preferably with the A2O3 stecheometry, A being a metallic atom and O oxygen) that crystallizes in the 14mm or 14/mmm space groups? thanks a lot angel luis

how to export data in Topas

Dear colleages: I have done a refinement with Topas 4.1, and would like to export the refinement for a niccer plot. to this end, I would like to know how to save the XRD data, not the plots. I would like to be able to save the model data in a two-column file (2theta versus intensity), and the

software for correcting peak positions in capillary XRD data

Dear colleages: could any of you indicate to me where to find free software to perform the absortion correction for XRD data taken in the capillary geometry? I need this to correct the peak positions. Thanks a lot, Angel L. Ortiz University of Extremadura, Spain

Re: LP factor in the Rietveld refinement

In this context: What about the LP for a Goebel mirror followed by a 4-bounce or 2-bounce primary monochromator? Best regards angel l. ortiz As far as I know, for X-ray mirrors the LP angle is near zero. Leonid *** Leonid A. Solovyov

RE: LP factor in the Rietveld refinement

Dear All, In this scenario, which should be the number for LP in Topas if ones has a D8 with a primary monochromator for pure CuKalpha1? thanks for the response, angel l. ortiz Dear Peter, Of course the LP correction can't be sample-dependent and for your configuration LP=0 should be Ok

crystal strcuture of ZrB2, ZrC, and MoSi2

Dear All: I would need to have the crystal structures of ZrB2, ZrC, MoSi2 for performing some Rietveld refinements. In particular, I need the atomic positions of the atoms forming the asymmetric unit, the space group (symbol and number), and the lattice parameters. Could anyone provide me that

Re: stresses-crystal structure changes

Dear Larry: Thanks for shearing for oppinion. Your explanation sounds great. Best reagrds, Angel [EMAIL PROTECTED] wrote: Dear all: Let me make you the following question. Suppose a polycrystalline coating deposited onto a substrate in such a way that the coating is subjected to

stresses-crystal structure changes

Dear all: Let me make you the following question. Suppose a polycrystalline coating deposited onto a substrate in such a way that the coating is subjected to in-plane compressive residual stresses after the deposition process. The coating has a cubic fcc crystal structure before the deposition

papers by Kitchingman

Dear All: I am interested in reading the papers by W J Kitchingman on the determination of deformation faults in metals and alloys. Can any of you email me the pdf files? Thanks in advance, Angel

peak profile effects due to doping clustering within a lattice

Dear colleages, I have a question about line broadening analysis of XRD peaks. This is as follow: I have a material which is doped with a reduced percentage (7 to 10 mol per cent) of dopings. Under a given processing condition, TEM indicates that the doping elemensts are not ramdomly distributed

some articles about quantitative phase composition analysis

Dear colleages, Could anyone provide me by e-mail a pdf file of the following papers: D.Y. Li and B.H. O'Connor. A multi-line standarless method for x-ray powder diffraction phase analysis. Adv. X-ray Anal., 35, 105-110 (1992). D.Y. Li and B.H. O'Connor. A mean normalized-intensity procedure

density of dislocations from the lattice microstrains

Dear colleages, Could any of you give the details about the procedure (equations, methods) to deduce the density of dislocatins from the lattice microstrains obtained from the Stokes and Wilson or variance or integral breadth methods. Thanks in advance. Sinverely yours, Angel L.