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Boron is an element that has a strong affinity for organic material since it formstrigonaland tetrahedral complexes with oxygen groups.
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Thetrigonalform is obtained by slow cooling from the melt.
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This example is from Wikipedia and may be reused under a CC BY-SA license.This indicates that the mineral has a primitive lattice and belongs to the hexagonal/trigonalpoint group.
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This example is from Wikipedia and may be reused under a CC BY-SA license.When coordinated theirtrigonalpyramidal molecular geometry results in a smaller ligand cone angles than might be expected, making them appealing as ligands.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Ordinarily, three-coordinated compounds adopttrigonalplanar or pyramidal geometries.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Melonite occurs astrigonalcrystals, which cleave in a (0001) direction.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Phosphoranes adopt atrigonalbipyramidal molecular geometry with the two apical bonds longer than the three equatorial bonds.
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This example is from Wikipedia and may be reused under a CC BY-SA license.A high temperature form with titanium atoms withtrigonalprismatic coordination is also known.
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This example is from Wikipedia and may be reused under a CC BY-SA license.However, for the five point groups in thetrigonalcrystal class there are two possible lattice systems for their point groups: rhombohedral or hexagonal.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The cancrinite group are minerals with hexagonal andtrigonalcrystal systems with various anions and cations located in cages within the main frame.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Note:trigonalsymmetry is part of the hexagonal group, but not all hexagonal crystals aretrigonal.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Its crystal system istrigonalhexagonal scalenohedral with symbol 2/m.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The shape of the shell istrigonalovate, with a subtruncated posterior margin and a rounded ventral and anterior margin.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The tris(dithiolene) complexes were the first examples oftrigonalprismatic geometry in coordination chemistry.
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This example is from Wikipedia and may be reused under a CC BY-SA license.Simple bonding theories point to thetrigonalplanar structure.
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This example is from Wikipedia and may be reused under a CC BY-SA license.It crystallizes in thetrigonalcrystal system as equant, distorted prisms withtrigonalpyramid terminations.
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This example is from Wikipedia and may be reused under a CC BY-SA license.It crystallizes in thetrigonal- rhombohedral system and has a white vitreous appearance with a conchoidal fracture.
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This example is from Wikipedia and may be reused under a CC BY-SA license.It crystallizes in thetrigonalcrystal system and shows a variety of crystal habits including tabular, acute rhombohedral, pseudo-cubic and pseudo-cuboctahedral.
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This example is from Wikipedia and may be reused under a CC BY-SA license.The shape of the molecule is a distortedtrigonalbipyramid.
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This example is from Wikipedia and may be reused under a CC BY-SA license.A nonahydrate is been characterized in the solid state, with a face-cappedtrigonalprism structure.
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This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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