Babingtonite

Formula:  Ca2(Fe,Mn)FeSi5O14(OH)

Origin of name:  For William Babington, Irish physician and mineralogist (1757-1833)

 

Crystal system:  Triclinic

Crystal class:  -1

Twinning:

Unit cell: a = 7.56 Ǻ, b = 12.45 Ǻ, c = 6.74 Ǻ, α  = 86.2, β = 93.9, γ = 112.4       

 

Colour:  Greenish black to brownish black

Diaphaneity: Opaque to faintly translucent

Luster:  Vitreous

Habit:  Crystals short prismatic or platy

Hardness:  5.5 to 6

Specific gravity:  3.36

Cleavage:  2; {001} perfect, {1-10} imperfect

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:  Series with manganbabingtonite. Found in veins cutting granite pegmatite and diorite, in cavities and vugs in mafic volcanic rocks and gneisses, in skarns.

 

Back to Alphabetical list Colour photos Optical properties/Thin sections SEM images TEM images vibrational spectra description IR spectra Raman spectra N-IR spectra F-IR spectra IES spectra