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Article
Determination of crystal structure of omphacite
The chemical formula of omphacite was expressed with (MII MI) (Si, Al)2O6. Cations that occupied the MII site were large cations such as Ca or Na, and Na/Na+Ca ratio ranged from 0.2 to 0.8; the 6-coordinated MI s...
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Article
STM study on micromorphology of pyrite and dynamic significance of ore-formation
A careful scanning tunneling microscope (STM) observation has been made on the micromorphology structure of the crystal faces for a group of pyrites which include two types of pyrite specimens: natural pyrites...
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Article
Crystal structure refinement of suolunite and its significance to the cement techniques
Based on the crystal structure refinement, the arrangement and characteristics of the double tetrahedra of Si-O backbone of suolunite have been precisely clarified. The double tetrahedra are isolated, and the ...