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Khmaralite, a new beryllium-bearing mineral related to sapphirine: A superstructure resulting from partial ordering of Be, Al, and Si on tetrahedral sites
Khmaralite beryllium-bearing mineral related to sapphirine superstructure resulting partial ordering Be Al Si tetrahedral sites
2012/4/1
Khmaralite, Ca Mg Fe Fe Al Be B Si O , is a new mineral closely related to.04 5.46 14.26 1.43 0.02 4.80 400.12 1.87sapphirine from Khmara Bay, Enderby Land, Antarctica. It occurs in a pegmatite metamo...
Substructure and superstructure of four-layer Ca-exchanged birnessite
Substructure superstructure four-layer Ca-exchanged birnessite
2012/3/30
Synthetic Ca-exchanged birnessite (CaBi) was studied by X-ray and selected-area elec-tron diffraction (XRD, SAED). The substructure of CaBi may be described with a four-layer monoclinic subcell with a...
TEM investigation of the domain structure and superstructure in hillebrandite, Ca2SiO3(OH)2
TEM investigation domain structure superstructure hillebrandite Ca2SiO3(OH)2
2012/4/9
Selected-area electron diffraction, dark-field images, and high-resolution transmission electron microscope images show that there are pervasive domains in hillebrandite from Mexico. The domains are i...