Lithiophilite-Triphylite Series

A complete series exists between the members. The crystal structure of the series members is very similar to that of the silicates of the olivine type. Near end member lithiophilite alters to purpurite, while near end member triphylite alters to heterosite.

History

Activities related to discovery and approval of the group members

Structural context

Orthorhombic System
20 measurement(s) or 100.00%2 member(s) or 100.00%
a4.6904—6.1 (4.7943)
b10.2855—10.555 (10.4043)
c4.744—6.156 (5.9967)
alpha90
beta90
gamma90
volume288.836—312.9 (298.262)

Based on 20 measurements
Lithiophilite
Triphylite

Chemical context

Stoichiometric formulas

Lithiophilite-Triphylite Series
mineralogy.rocks
  • Aug. 30, 2022LiBPO4

Elements recorded on EPMA

18
Li
18
Mn
18
O
18
P
13
Fe
5
Mg
2
Si

Physical properties

ColorColor entities, recognized using a custom trained NER model
2
  • colourless
2
  • brown-green
  • pale grey-green
2
  • golden-yellow
  • pale yellow
1
    1
    • salmon-orange
    1
    • light green-gray
    1
    • reddish-brown
    Color noteOriginal color note from the source
    Brown-green, light green-gray, may appear blue-gray; colourless to pale yellow in transmitted light.; Reddish-brown, yellowish brown, golden-yellow, salmon-orange, pale grey-green (when fe-rich); colourless to light yellow, pink in transmitted light.
    StreakStreak entities, recognized using a custom trained NER model
    2
    • colorless
    2
    • grayish white
    Streak noteOriginal streak note from the source
    Colorless to grayish white; Colorless to grayish white.
    Lustre
    • Resinous2
    • Sub-Vitreous2
    • Greasy2
    Fracture
    • Irregular/Uneven2
    • Sub-Conchoidal1
    Transparency
    • Transparent1
    • Translucent2
    Tenacity
    • brittle1
    Hardness