Most cited

Crystal structures and X-ray powder diffraction data for AAlGe2O6 synthetic leucite analogs (A = K, Rb, Cs)
Anthony M. T. Bell
Published online by Cambridge University Press:

16 May 2024, pp. 162-169
- Article
- - You have access
  - Open access
- PDF
- HTML
- Export citation
Leucites are tetrahedrally coordinated silicate framework structures with some of the silicon framework cations that are partially replaced by divalent or trivalent cations. These structures have general formulae A2BSi5O12 and ACSi2O6, where A is a monovalent alkali metal cation, B is a divalent cation, and C is a trivalent cation. There are also leucite analogs with analogous tetrahedrally coordinated germanate framework structures. These have general formulae A2BGe5O12 and ACGe2O6. In this paper, the Rietveld refinements of three synthetic Ge-leucite analogs with stoichiometries of AAlGe2O6 (A = K, Rb, Cs) are discussed. KAlGe2O6 is I41/a tetragonal and is isostructural with KAlSi2O6. RbAlGe2O6 and CsAlGe2O6 are $I\bar{4}3d$ cubic and are isostructural with KBSi2O6.

Powder Diffraction Data for Nitroguanidine, C(NH2)2NNO2
E.K. Vasil'ev, A.N. Sapozhnivov, Z.A. Dobronravova, L.I. Vereshchagin
Published online by Cambridge University Press:

10 January 2013, pp. 164-165
- Article
- - Get access
    
    Check if you have access via personal or institutional login
    
    Log in Register
- Export citation
A powder diffraction pattern and unit cell data for nitroguanidine, C(NH2)2NNO2 are presented. The orthorhombic space group Fdd2 (43) has been confirmed by single crystal methods.

Powder Diffraction