- All
crystallize in the
monoclinic system, with a
tendency towards pseudohexagonal crystals, and are
similar in
structure but vary in
chemical composition...
- termination. It has four
prism faces and two
pinacoid faces to form a
pseudohexagonal crystal.
Although not
easily seen
because of the
cleavage and sheets...
- to trigonal. The
structure of
corundum is
sometimes described as a
pseudohexagonal structure. The Young's
modulus of
corundum (sapphire) has been reported...
- the
pseudohexagonal c
crystal axis and they are
divided vertically by a medial,
slightly reentrant twinning line
parallel to the
pseudohexagonal c axis...
-
carbonate mineral with
formula Na2Ca(CO3)2. It
forms colorless,
platey pseudohexagonal orthorhombic crystals that are
typically twinned. It has a specific...
- acicular, tabular, prismatic, coral-like
Twinning Cyclic on {110},
forms pseudohexagonal aggregates. If polysynthetic,
forms fine
striations parallel to [110]...
- Terrible, in 1568.
Micas are
distinguished from
other minerals by
their pseudohexagonal crystal shape and
their perfect cleavage,
which allows the crystals...
- marbles. Both
monoclinic and
triclinic polytypes exist and both are
pseudohexagonal. It was
first described in 1837 from
localities in the Ural Mountains...
-
decomposition at 370 °C,
forming I2. The
crystals are
monoclinic and
pseudohexagonal, with
centrosymmetric C6I6 units. The
carbon atoms lie in a
plane with...
- as crystals, thin
plates or stacked. More
commonly as
microscopic pseudohexagonal plates and
clusters of plates,
aggregated into compact,
claylike m****es...
