| 词汇 | trigonal |
| 释义 | BETA Examples of trigonaltrigonal isn’t in the Cambridge Dictionary yet. You can help! Boron is an element that has a strong affinity for organic material since it forms trigonal and tetrahedral complexes with oxygen groups. The trigonal form is obtained by slow cooling from the melt. From Wikipedia 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/trigonal point group. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When coordinated their trigonal pyramidal molecular geometry results in a smaller ligand cone angles than might be expected, making them appealing as ligands. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Ordinarily, three-coordinated compounds adopt trigonal planar or pyramidal geometries. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Melonite occurs as trigonal crystals, which cleave in a (0001) direction. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Phosphoranes adopt a trigonal bipyramidal molecular geometry with the two apical bonds longer than the three equatorial bonds. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A high temperature form with titanium atoms with trigonal prismatic coordination is also known. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. However, for the five point groups in the trigonal crystal class there are two possible lattice systems for their point groups: rhombohedral or hexagonal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The cancrinite group are minerals with hexagonal and trigonal crystal systems with various anions and cations located in cages within the main frame. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Note: trigonal symmetry is part of the hexagonal group, but not all hexagonal crystals are trigonal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Its crystal system is trigonal hexagonal scalenohedral with symbol 2/m. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The shape of the shell is trigonal ovate, with a subtruncated posterior margin and a rounded ventral and anterior margin. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The tris(dithiolene) complexes were the first examples of trigonal prismatic geometry in coordination chemistry. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Simple bonding theories point to the trigonal planar structure. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It crystallizes in the trigonal crystal system as equant, distorted prisms with trigonal pyramid terminations. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It crystallizes in the trigonal - rhombohedral system and has a white vitreous appearance with a conchoidal fracture. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It crystallizes in the trigonal crystal system and shows a variety of crystal habits including tabular, acute rhombohedral, pseudo-cubic and pseudo-cuboctahedral. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The shape of the molecule is a distorted trigonal bipyramid. From Wikipedia 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-capped trigonal prism structure. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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