| 41. | Each trigonal prism shares two rectangular faces with the nearby prisms, forming infinite prism columns.
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| 42. | It is a regular square prism in three orientations, and a trigonal trapezohedron in four orientations.
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| 43. | In solid silver nitrate, the silver ions are three-coordinated in a trigonal planar arrangement.
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| 44. | In general, bond lengths in trigonal bipyramidal pentacoordinate species are longer than those in tetracoordinate analogues.
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| 45. | Besides tetrahedral, trigonal and octahedral holes, there were all-purpose balls with 24 holes.
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| 46. | "' Eucryptite "'is a lithium bearing aluminium trigonal-rhombohedral crystal system.
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| 47. | Sr + Ar 4 has two trigonal pyramids sharing a face and strontium at the common apex.
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| 48. | Pentacoordinated species are concluded to be more reactive because of their looser bonds as trigonal-bipyramidal structures.
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| 49. | The molecular geometry of the former is also trigonal bipyramidal, whereas that of the latter is linear.
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| 50. | Trigonal, tetragonal and hexagonal crystals have a single optic axis, parallel to the c crystal axis.
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