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rhombohedral    
菱面型; 菱形; 菱形六面体

菱面型; 菱形; 菱形六面体

rhombohedral
adj 1: having threefold symmetry [synonym: {rhombohedral},
{trigonal}]


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  • 7. 1: Crystal Structure - Chemistry LibreTexts
    The rhombohedral lattice is also known as trigonal, and has no angles equal to 90°, but all sides are of equal length (a = b = c), thus requiring only by one lattice parameter, and all three angles are equal (α = β = γ) A hexagonal crystal structure has two angles equal to 90°, with the other angle ( γsize 12{γ} {}) equal to 120°
  • Crystal basis - MIT OpenCourseWare
    Word about Relation between Rhombohedral and Hexagonal lattices Two lattices are related: rhombohedral is a primitive unit cell in a degenerate hexagonal cell By stacking a hexagonal mesh in the BA order, we can construct a triply degenerate hexagonal cell An example of this sort of chicanery is the rhombohedral and trigonal lattices of calcite
  • Rhombohedron -- from Wolfram MathWorld
    A rhombohedron is a parallelepiped bounded by six rhombi such that opposite faces are congruent A rhombohedron having all six rhombic faces congruent is known as a trigonal trapezohedron Special cases include the cube and two golden rhombohedra
  • Simple Rhombohedral Unit Cell - Materials Science Engineering
    The Simple Rhombohedral (SR), or primitive rhombohedral unit cell, is an unusual way that atoms can be arranged in solids This crystal structure is found in non-STP phases of polonium, mercury, and lithium
  • Bravais Lattices: Rhombohedral - University College London
    This figure shows the rhombohedrally-centred hexagonal cell (solid lines) and its relationship to the primitive rhombohedral cell (dotted lines); the two-middle points on the dashed line correspond to the rhombohedral lattice centring
  • Rhombohedral Crystal - an overview | ScienceDirect Topics
    A Rhombohedral Crystal is defined as a crystal structure with a rhombohedral shape and a specific arrangement of atoms, such as Bi2Se3, which exhibits a layered structure with a hexagonal lattice within each layer
  • Trigonal system | Definition Facts | Britannica
    trigonal system, one of the structural categories to which crystalline solids can be assigned The trigonal system is sometimes considered to be a subdivision of the hexagonal system
  • Rhombohedral - (Inorganic Chemistry I) - Vocab, Definition . . . - Fiveable
    Rhombohedral refers to a crystal system characterized by a three-dimensional lattice structure where the unit cell is shaped like a rhombohedron, which is a three-dimensional parallelogram
  • Rhombohedral Crystal Systems - globalsino. com
    Table 3548a and Figure 3548 show the rhombohedral crystal systems (in orange) and the schematic illustrations of the rhombohedral lattices, respectively As indicated in Table 3548a, the structures belonging to the trigonal system can have either a rhombohedral or hexagonal lattice
  • Rhombohedron - Wikiwand
    In geometry, a rhombohedron is a special case of a parallelepiped in which all six faces are congruent rhombi It can be used to define the rhombohedral lattice





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