- Z = Al, Cr, etc., T = Si, As, V, Fe, Al) All are
cubic or
strongly pseudocubic. IMA/CNMNC – Nickel-Strunz –
Mineral subclass: 09.A
Nesosilicate Nickel-Strunz...
-
Perovskite crystals may
appear to have the
cubic crystal form, but are
often pseudocubic and
actually crystallize in the
orthorhombic system, as is the case for...
- iron-sulfido
cluster cofactors (FeMoco) as
active sites, each
bearing two
pseudocubic iron-sulfido structures. It is a
genetically tractable system that is...
-
Identification Color White to grey
Crystal habit Commonly as euhedral,
pseudocubic crystals;
rarely granular, m****ive
Twinning Common and
repeated on {110}...
-
black Crystal habit Granular to m****ive,
rarely as
striated crystals,
pseudocubic.
Twinning About [111]
creating pseudo-cubic
forms and
striations Cleavage...
- brown,
purple Crystal habit Granular, m****ive,
disseminated –
Crystals pseudocubic, dodecahedral,
octahedral Twinning Penetration twins on [111] Cleavage...
-
refer to a
valid species til this day.
Analcime crystals always look
pseudocubic. Its
common crystal forms include trapezohedron,
truncated trapezohedron...
-
colorless in
transmitted light Crystal habit Crystalline,
disseminated (
pseudocubic)
Twinning Rarely as
penetration twins Cleavage None
Fracture Irregular/uneven...
-
Identification Color Black,
reddish brown Crystal habit Crystalline, metamict,
pseudocubic Cleavage None
Fracture Brittle Luster Resinous Streak Brownish grey Diaphaneity...
-
corresponding tin
bearing mineral Ag8SnS6, also
found in
Bolivia as
pseudocubic crystals, and
known by the name canfieldite.
There is also a related...
