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Research Article


ScienceAsia 6 (1980): 030-045 |doi: 10.2306/scienceasia1513-1874.1980.06.030

 

X-RAY POWDER DIFFRACTION STUDY OF SOME MINERAL COMPONENTS OF NIOBIUM-TANTALUM FAMILY

 

S. PRAMATUS and R. KRITAYAKIRANA

Summary: Mineral components of niobium-tantalum family from some mines in Thailand have been studied using the X-ray powder diffraction method. Among these are found columbite-tantalite, niobian rutile, and ilmenorutile, mostly mixed with cassiterite. The unit cell dimensions of these minerals are refined by the least-squares method. The powder diffraction data from the powder photographs taken by the Guinier-Hagg focusing camera; are obtained in the form of tables. These photographs can be more quickly and accurately used as local identification standards.

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Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 5, Thailand

Received 12 November 1979