Dear Mr,


I send you my phase identification result for files SMRR. The interpreted files are 
in image format HPGL (Hewlett-Packard Graphics Language). However I write you my 
phase identification:


File: SMRR-1
ICDD patterns: 71-880 (Ca5(PO4)3F), 85-335 (SiO2), 86-2348 (Mg(CO3)). In this sample threre are other minor phases  still not identified at this stage.


File: SMRR-2
ICDD patterns: 88-1173 (TiO2). In this sample I have only identified this minor phase.


File: SMRR-3
ICDD patterns: 19-1946 (Thalidomine), 7-710 (6-amino-2thioxo-4(1,3)-pyrimidone hydrate) plus other phase still not  identified.


File: SMRR-4
ICDD patterns: 5-561 (PbO), 23-333 (Pb5O4SO4) plus minor phases.


Software used: DIFFRAC-AT v3.0 from SOCABIM-SIEMENS.
ICDD: realase 2000, data sets 1-50 and 70-88


Research experience: Ph D. in Geology (Crystallography). From 1995 up to present 
working as XRD technicien at the University.


I would like to know if we must consider in our interpretation peak position errors 
due to sample preparation, for instance sample transparency and/or preferred orientation.