The crystal structures have been determined by X-ray monocrystal diffraction.

用X-射线单晶衍射测定了该化合物的晶体结构；

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The crystal structures have been determined by single-crystal X-ray diffraction.

所有化合物的晶体结构都通过单晶X-射线衍射确定。

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These minerals must have been produced by the quasar, Dr Markwick-Kemper argues, because their crystal structures would not survive long in the hostile conditions of outer space.

Dr Markwick-Kemper认为，这些矿物肯定是类星体产生的，因为在外太空它们的晶状结构很难长时间存在。

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Hydrogen was indeed found, but it is still unclear whether it is in the form of ice, or of some other hydrogen-containing compound, such as hydrated minerals that have water bound chemically into their crystal structures.

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In order to make a photonic crystal, though, the materials have to be organised into structures no more than a wavelength of light apart.

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