Document KkwxqMBgnadYGJ1jDze3aJNr

Technology of Materials 2030 Alameda Padre Serra Santa Barbara, California 93103 Report Wo.: 871310 Prepared For: H. M. Hedrick Co. P. O. Box 14537 Long Beach, CA 90814 Submitted To: Sandy Hedrick Subject: X-Ray Diffraction Analysis of an Apache Slag Authority: Sandy Hedrick Date: January 31, 1978 LAM 002427 DPMC-08582 INTRODUCTION A sample of Apache slag fines was brought to the laboratory for X-ray diffraction analysis. Of special interest was the identi fication of possible crystalline silica phases. The following report represents the results of that study and is submitted respectfully. SAMPLE PREPARATION & STUDY METHODS As the material was received in powder form, no preparation was necessary other than packing it into a standard holder for study in a Philips Electronics X-ray diffractometer equipped with a crystal monochromator. The operating conditions are marked on the enclosed X-ray diffraction charts. DISCUSSION The X-ray diffraction chart enclosed is marked with the interplanar spacing measurement in angstrom units and with the corres ponding Miller Index (hkl) of the crystallographic planes caus ing each reflection. Phase identification was made by compari son with standard data in the JCPDS/ASTM diffraction files. The positions of most intense peaks for alpha-quartz, alphacristobalite and tridymite forms of silicon dioxide are marked. As can be seen, measurable amounts of these crystalline silicon forms are not present. The detection level for these forms is better than 1%. The slag was found to be composed of three crystalline phases. The major component is the iron silicate mineral known as Fayalite, 2FeO.SiC>2. A strong intermediate phase of a Dropside mineral, CaO.MgO.2Si02, is also present along with a lesser amount of the iron oxide mineral. Magnetite, Fe^^. Except for a probable glass phase, which would not show up in the diffractometer study ex ept in high concentrations, no significant amounts of other minerals are present. -------------------- LAM 002428 DPMC-08583