The Chemical and X-Ray Analysis of Some Saudi Arabian Minerals

• Main Authors: M.A.A. Issa, A.S. El-Hiti, M.H. Wahbah
• Format: Article
• Language: Arabic
• Published: King Saud University 1981-01-01
• Series: Journal of Islamic Studies
• Subjects: X-Ray Analysis
• Online Access: http://jes.ksu.edu.sa/sites/jes.ksu.edu.sa/files/0059.pdf

Seven minerals from different provinces of Saudi Arabia were subjected to different methods of analysis. All the results were considered as a whole to see how far they complement or support each other. Four samples were composed of kaolinite with free silica and hematite. Calcite and dolomite were identified in two samples. An interesting feature of this study is magnetite which widespread in a big area and it is an important source of iron bearing minerals. The resutls were discussed and explained in terms of the ideal formula of each compound. A limestone is a sedimentary rock consisting essentially of calcium carbonate with minor amounts of magnesium carbonate, silica, clay, iron oxide or carbonaceous material. With an increase in the content of magnesium carbonate, limestone gra¬dually passes over to a dolomitic limestone, which is a mixture of dolomite and calcite and finally to normal dolomite. The structure of calcite was one of the earliest to be analyzed by x-rays, 1, . Dolomite has a structure similar to that of calcite, but the atoms along any three¬fold axis are alternately Ca and Mg. The structure of kaolinite was suiglested by Pauling, 2, . It was worked out in some details by Gruner, 3, , Hendricks k4, . Brindley and Robinson, 5, had an occa