| 21. | But not all hexagonal crystals are trigonal .)
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| 22. | Each gallium atom bonds to 5 other gallium atoms forming a distorted trigonal bipyramid.
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| 23. | The coordination geometry of the Mo is sometimes found as octahedral and trigonal prismatic.
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| 24. | It also contains large amounts of trigonal system.
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| 25. | Atoms with five coordinate positions are usually trigonal bipyramidal or square pyramid in shape.
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| 26. | The trihalides adopt a planar trigonal structure.
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| 27. | Quartz belongs to the trigonal crystal system.
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| 28. | Protonation prevents it acting as a ligand and the copper site geometry becomes trigonal planar.
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| 29. | It crystallizes in the trigonal crystal system.
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| 30. | It forms a trigonal bipyramidal molecular geometry.
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