Pyroxene Group

A large group of inosilicate (chain silicate) minerals with the general formula ADSi2O6. It is divided into the Clinopyroxene Subgroup (monoclinic) and the Orthopyroxene Subgroup (orthorhombic). The most recent nomenclature is given by Morimoto et al. (1988).

History

Activities related to discovery and approval of the group members

Structural context

Monoclinic System
675 measurement(s) or 65.85%48 member(s) or 70.59%
Orthorhombic System
177 measurement(s) or 17.27%8 member(s) or 11.76%
Unclassified
173 measurement(s) or 16.88%12 member(s) or 17.65%
a5.217—10 (9.6434)
b5.217—9.179 (8.8199)
c4.751—9.158 (5.2464)
alpha90
beta69.67—110.33 (106.3253)
gamma90—120 (90.0444)
volume128.79—520.671 (427.5058)

Based on 675 measurements
Aegirine
Aegirine-augite
Asteroite
Augite
Baikalite
Blanfordite
Burnettite
Chrome-Omphacite
Chromian Diopside
Chromojadeite
Clinoenstatite
Clinoferrosilite
Davisite
Diopside
Diopside-Hedenbergite Series
Diopside-Johannsenite Series
Esseneite
Fassaite
Fedorovite
Grossmanite
Halagurite
Hedenbergite
Hedenbergite-Hypersthene
Jadeite
Jervisite
Johannsenite
Kanoite
Korea-Augite
Kosmochlor
Kushiroite
Lavrovite
Manganoan Hedenbergite
Namansilite
Natalyite
Omphacite
Petedunnite
Pigeonite
Salite
Schefferite
Soda Jadeite
Soda-Augite
Spodumene
Titanian Augite
Titanian Jadeite
Titanian Omphacite
Urbanite
Vanadian Aegirine
Zinc-Schefferite

Chemical context

Stoichiometric formulas

Pyroxene Group
mindat.org
  • March 13, 2023ADSi2O6
mineralogy.rocks
  • Aug. 30, 2022ABX2O6

Elements recorded on EPMA

1005
O
1004
Si
675
Mg
575
Ca
536
Fe
343
Al
324
Na
156
Mn
123
Ti
87
Cr
40
Li
28
Zn
26
K
24
V
16
Sc
14
I
6
B
5
Ni
4
Co
2
Ga
2
H
1
Be
1
Cu
1
F
1
Ge
1
In
1
Nb
1
Sr

Physical properties

ColorColor entities, recognized using a custom trained NER model
17
  • apple-green
  • blue-green
  • bright grass-green
  • bright green
  • brown-green
  • brownish green
  • dark green
  • dark olive green
  • emerald green
  • light green
  • yellowish green
14
  • dark brown
  • greenish brown
  • pinkish brown
  • purplish brown
  • red-brown
  • reddish brown
  • yellowish brown
6
  • green-black
  • greenish black
6
  • colourless
  • pale
5
  • greenish white
  • grey-white
  • snow white
5
  • gray
  • light gray
3
  • pale violet
3
  • greenish yellow
2
  • purplish blue
2
  • faint pink
1
  • dark brownish red
1
    1
    • yellow-orange
    Color noteOriginal color note from the source
    Apple-green, greenish white, purplish blue, blue-green, violet, white, black; Black, brown, greenish brown; Blue-green, grey-white, dark brown, colourless; Bright green with a tinge of yellow; Brown; Brown, colourless, green; Brown-green, black, green-black, brown, purplish brown; Brownish green, black; Colourless, greenish yellow, yellowish brown, green-brown; Colourless, yellow, light green, emerald-green, pink to violet, purple, white, gray; Dark brownish red, purplish red; Dark brown to black; Dark green; Dark green to greenish black, reddish brown, black; Dark olive green to dark brown; Emerald green; Green to bright grass-green; Light gray; Light gray in thin-section; Light green; Light green, dark green, brown; Light to dark green, blue, brown, colourless, snow white, grey, pale violet; Pale buff, yellow-orange; faint pink in thin section.; Pinkish brown; Red-brown; White, yellowish green, brown, greenish white or grey, olive-green
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    StreakStreak entities, recognized using a custom trained NER model
    14
    • greenish white
    • greyish white
    4
    • greenish gray
    • pale yellowish grey
    3
    • dark brown
    • pale brown
    • pale gray brown
    3
    • light green
    • pale green
    1
    • brownish violet
    Streak noteOriginal streak note from the source
    Brownish violet; Green; Greenish gray, light to dark brown; Greenish white; Greyish white; Grey to white; Light green; Pale brown to white; Pale gray brown; Pale green; Pale yellowish grey; White; White, grey
    Lustre
    • Pearly3
    • Vitreous18
    • Dull6
    • Sub-Metallic1
    • Waxy2
    • Resinous2
    • Adamantine1
    • Sub-Vitreous3
    • Greasy1
    Fracture
    • Irregular/Uneven9
    • Splintery2
    • Step-Like2
    • Sub-Conchoidal2
    • Conchoidal2
    Transparency
    • Opaque6
    • Transparent11
    • Translucent13
    Luminescence
    Non-fluorescent
    Tenacity
    • brittle9
    Hardness