Assertion: halite's structure | /r/HasAspect | triclinic symmetry
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Source sentences:
text: Although the framework is sufficiently elastic to adjust itself to the different sizes of the A cations, the relatively large potassium cations give structures that have a monoclinic or only slightly off-monoclinic symmetry, whereas the smaller sodium and calcium cations lead to distorted structures that have triclinic symmetry.