Formula: Ca2Mn7Si10O28(OH)2 . 5H2O
Origin of name: From Greek ina = fibers
Crystal system: Triclinic
Crystal class: -1
Twinning:
Unit cell: a = 8.93 Ǻ, b = 9.25 Ǻ, c = 11.95 Ǻ, α = 91.8°, β = 132.6°, γ = 94.4°
Colour: Pink, pinkish orange; darkens to brown on exposure to light and air
Diaphaneity:
Luster: Vitreous to somewhat silky
Habit: Crystals prismatic or tabular, elongated along c-axis, often with chisel-shape; acicular radiating; veinlets
Hardness: 5.5
Specific gravity: 3.03
Cleavage: 2; {010} perfect, {100} good
Tenacity: Brittle
Streak: White
Synonyms/varieties:
Comments:
| Back to Alphabetical list | Colour photos | Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |