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

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.

software for detemining dislocations density

Dear colleages, Could any of you tell me if there exists a free software to calcalate densities of dislocations from the width or integral breadth of individual the X-ray diffraction profiles? Regards. Angel Luis.

software for detemining dislocations density

Dear colleages, Could any of you tell me if there exists a free software to calcalate densities of dislocations from the width or integral breadth of individual the X-ray diffraction profiles? Regards. Angel Luis.

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 procedur

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

determination of residual stresses and lattice parameters in

Dear All: I am working on a bulk, polycrystalline (fcc) material that has multiple deformation faults in the interior of the grains, and has also macroscopic residual stresses. I have the set of positions for the experimental XRD peaks, and I would like to calculate both the magnitude of the resid

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

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 pr

Re: stresses-crystal structure changes

Dear Luca: Thanks for the reply and your good comment. Best regards, Angel > Because you are collecting just in Bragg-Brentano condition, or if > not for every collection you just see only one direction in the > sample, not all together. And if you homogenize all together you will > only observ

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 subj

line-braodening in HCP crystals

Dear all: Recently we performed the XRD analysis of a material that has a HCP crystal structure. My question is if based on the peak broadening of {300} planes we have indeed estimated the crystal size along <210> direction since <210> is perpendicular to {300} for HCP crystals. Any suggestion? T

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 in

grazing angle diffraction in single-crystal Si

Dear All: How knows references where I could find the entire diffraction pattern of single-crystal Si taken under grazing angle diffraction. Thanks so much, Angel L. Ortiz

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

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. Sol

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

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