-
lattice systems (hexagonal and
rhombohedral).
While commonly confused, the
trigonal crystal system and the
rhombohedral lattice system are not equivalent...
-
congruent rhombi. It can be used to
define the
rhombohedral lattice system, a
honeycomb with
rhombohedral cells. A
rhombohedron has two
opposite apices...
- cubes.
Rhombohedral cleavage occurs when
there are
three cleavage planes intersecting at
angles that are not 90 degrees.
Calcite has
rhombohedral cleavage...
- sets of
Miller indices are used to
describe directions in
hexagonal and
rhombohedral crystals,
including calcite crystals:
three Miller indices h, k, l in...
- graphite.
Rhombohedral graphite cannot occur in pure form.
Natural graphite, or
commercial natural graphite,
contains 5 to 15%
rhombohedral graphite and...
- in
particular the
trigonal crystal system is
often confused with the
rhombohedral lattice system, and the term "crystal system" is
sometimes used to mean...
-
crystalline and
amorphous forms. Well
known crystalline forms are α-
rhombohedral (α-R), β-
rhombohedral (β-R), and β-tetragonal (β-T). In
special cir****stances, boron...
-
Monoclinic 13
Orthorhombic 9
Tetragonal C4, S4, C4h 7
Tetragonal C4v, D2d, D4, D4h 6
Rhombohedral C3, S6 7
Rhombohedral C3v, D6, D3d 6
Hexagonal 5
Cubic 3...
-
distinct polymorphs:
rhombohedral, and two
monoclinic forms, of
which only two are
stable at
standard conditions. The
rhombohedral crystal form is the...
- calcium, iron, magnesium,
manganese carbonate mineral of the
group of
rhombohedral carbonates with the
chemical formula Ca(Fe,Mg,Mn)(CO3)2. In composition...
