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3 Result(s)

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  1. No Access

    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...

    Qifang Zhang, Zhesheng Ma, Nicheng Shi in Chinese Science Bulletin (1999)

  2. No Access

    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...

    Rong Ye, Lunshan Zhao, Zhesheng Ma, Yongli Shen, ** Zhao in Chinese Science Bulletin (1999)

  3. No Access

    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 ...

    Zhesheng Ma, Nicheng Shi, Guodong Mou, Libing Liao in Chinese Science Bulletin (1999)