Disorder in Ho2Ti2−xZrxO7: pyrochlore to defect fluorite solid solution series
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چکیده
منابع مشابه
Structure and Conductivity of Pyrochlore and Fluorite Type Solid Solutions
High oxygen conductivities can be achieved in cation ordered LnxZrl_=O2_l x (Ln=Gd, Nd) solid solutions with pyrochlore (P) structure. High values of the pre-exponentlal factor °o are correlated with the degree of anion disorder in the 8b oxygen sublattice (neutron diffraction). The activation energy AH is lowered by cation ordering (F-P transition; effect of x) due to the occurence of a prefer...
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The effect of pyrochlore order in solid solutions with the defect fluorite structure was studied. The amount of order was changed by various heat treatments or by varying the cation composition. Examples of short range order and microdomainformation have been observed in Tb2Zr207+x and Gd2Zr207. Pyrochlore order results in a decrease of the activation enthalpy and pre-exponential factor for oxy...
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orpiment, getchellite and stibnite from zarshuran deposit, nw iran, exhibit extensive as-sb substitution. there are four known minerals along as2s3-sb2s3 join, i.e. orpiment (as2s3), wakabayashilite [(as,sb)20s30], getchellite (assbs3) and stibnite (sb2s3). extensive mineralogical studies by scanning electron microscope (sem) and electron probe micro-analyzer (epma) indicate that getchellite fr...
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ژورنال
عنوان ژورنال: RSC Advances
سال: 2020
ISSN: 2046-2069
DOI: 10.1039/d0ra07118h