Rhombohedral system


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(Crystallog.) a division of the hexagonal system embracing the rhombohedron, scalenohedron, etc.

See also: Rhombohedral

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The X-ray powder diffraction lines of Mg-Al [(OH).sub.2]P[O.sub.4] (1) were preliminarily indexed in the rhombohedral system space group R-3c (167) with the unit cell data: a = b = 4.7602 and c = 12.9930 [Angstrom] (Ref.
Use of Nanostructured Layered Double Hydroxides as Nanofilters in the Removal of [Fe.sup.2+] and [Ca.sup.2+] Ions from Oil Wells
Further XRD analysis predicts almost 79.93% corundum in sample C with closed pack rhombohedral system. Density and hardness of corundum are larger than that of the diaspore.
Thermal Transformation of Indigenous Diaspore
(2) In the rhombohedral system, the triply primitive hexagonal cell is used.
Lattice symmetry and identification - the fundamental role of reduced cells in materials characterization

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