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1·All kinds of PWO crystals showed the body-centered tetragonal structure in the Raman spectra.

拉曼光谱证实晶体的结构为体心四方结构。

2·The nanometer tetragonal polycrystal zirconia powder was prepared by the super alkaline method at low temperature.

利用低温超强碱法制备出了纳米四方多晶氧化锆粉体。

3·The results of XRD and SEM show that the main crystal phase is the non-full-filled tetragonal tungsten bronze structure.

SEM结构分析可知，主晶相为非填满型钨青铜结构四方晶相。

4·But the tetragonal phase in the surface region transforms easily to monoclinic phase when the samples are exposed to air.

尽管惰性气氛和还原气氛下焙烧样品有利于四方相的稳定，但样品暴露于空气中后，表面四方相较易转变为单斜相。

5·We comprehensively investigate and discuss the relation in the tetragonal, rhombohedral and coexistence phase region of PZT.

我们对PZT四方相区、三角相区和混合相区介电常数与晶格畸变的关系进行了全面研究和探讨。

6·Under the high temperature and high pressure, the hexagonal graphite crystals can change into the tetragonal diamond crystals.

在高温高压下，六方晶格的石墨转变为立方晶格的金刚石。

7·We also study the relation between the dielectric constant and lattice distortion of the PT tetragonal and cubic phase region.

我们还研究了PT四方相区和立方相区介电常数与晶格畸变的关系。

8·The results indicate that the coating is mainly composed of tetragonal and cubic phase and a small amount of monoclinic zirconia.

结果表明，涂层主要以四方相和立方相构成，并含有少量的单斜相。

9·The results of SEM, XRD and XPS measurements of those films show that all films have single tetragonal structure of scheelite - type.

XRD和XPS分析结果表明，制备的钼酸盐薄膜均为表面均匀致密的四方晶系单相薄膜。

10·The mineral chalcopyrite usually is found in compact masses or in mixtures with various other mineral as opaque, brass-yellow, tetragonal crystals.

黄铜矿通常以不透明的黄铜色的四角形结晶的方式在紧密物质或和其他各种矿物质混合体中被发现。