The crystal structure and cation distribution of highly nonstoichiometric magnesium-doped potassium β-alumina

Synthesis and Characterization of a New Layered Barium Aluminate Containing Six-Membered Rings: BaAl2O3(OH)2·H2O

“…The bond lengths for the terminal Al}OH bonds are 1.772(8) and 1.811(8) A > , respectively. These values are in agreement with Al}OH bond lengths for the barium aluminate compounds reported previously (13). The bond angles of O}Al(1)}O and O}Al(2)}O vary from 105.3(4)3 to 117.9(4)3.…”

Searching for the dopant ion in Eu2+-activated BaMgAl10O17 phosphor with synchrotron diffraction

“…The intensities were extracted and corrected from absorption, considering a 20% compacity porosity as measured by weighting the capillary. The refinement was carried out starting from the data set of Iyi et al for the undoped compound [13], then the structural model was improved to take into account the specific features of the title compound.…”

“…For example, bulky cations such as Na + , K + , Rb + , Ag + and Tl + occupy partly at least two of these sites each [12]. In BaMgAl 10 O 17 , Mg 2+ substitutes half for Al 3+ in the widest tetrahedral site, while Ba 2+ occupies exclusively slightly offcentered nine-fold coordinated sites around the BR position, in the interblocks planes that form a 2D near-close array with the interblocks oxygen atom O(5) [13].…”

Fabrication of dense BaMgAl10O17:Eu2+ phosphor particles by spray pyrolysis

“…In BAM structure, therefore, the Eu 2+ activators occupy for Ba 2+ sites. Phase purity and crystallinity for the BAM structure strongly affect the luminescent property [18]. As shown in Fig.…”