-
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...
- 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...
-
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...
-
Identification Color White to grey
Crystal habit Commonly as euhedral,
pseudocubic crystals;
rarely granular, m****ive
Twinning Common and
repeated on {110}...
-
Usually m****ive, co****ly granular. The rare
crystals are
equant and
pseudocubic Twinning Very common,
often repeated or
polysynthetic with simultaneous...
-
Identification Formula m**** 146.45 g/mol
Color Blue to
black Crystal habit Pseudocubic crystals are rare,
usually as
intergrowths with
other copper sulfides...
-
corresponding tin
bearing mineral Ag8SnS6, also
found in
Bolivia as
pseudocubic crystals, and
known by the name canfieldite.
There is also a related...
- 871 [Å]; Z = 2
Identification Color Greenish black Crystal habit M****ive,
pseudocubic Cleavage None Mohs
scale hardness 4.5
Luster Metallic Streak Black Diaphaneity...
-
group Pca21
Identification Color Colorless to deep
purple Crystal habit Pseudocubic crystals Twinning Rare as
interpenetration twins on [111]
Cleavage None...
