高纯超细尖晶石粉体主要应用于人工晶体，透明陶瓷材料，耐火材料等行业。
The high purity and ultrafine spinel powders are mainly used in some high and new technology industries field such as artificial crystal, transparent ceramics, refractory and so on.
介绍国内外制备钨酸铵溶液、 仲钨酸铵晶体及高纯仲钨酸铵的制备方法。
The preparing processes of ammonium tungstate solution, ammonium paratungstate crystal and high pure ammonium paratungstate crystal are reviewed.
给出了各晶系晶体一般声学模及高对称方向纯模的散射张量转动修正的确切形式。
The exact rotational correction of the scattering tensor related to general acoustic modes and pure modes in the higher symmetry directions, for different crystal systems, is presented.
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