Congolite

Formula:  (Fe,Mg,Mn)3B7O13Cl

Origin of name:  For Locality; near Brazzaville, Zaire (formerly Belgian Congo)

 

Crystal system:  Hexagonal

Crystal class:  -3 2/m

Twinning:

Unit cell:

 

Colour:  Pale red

Diaphaneity:  Transparent

Luster:

Habit:  Massive; fine grained

Hardness:

Specific gravity:  3.58

Cleavage:  None

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:  Dimorphous with ericaite

 

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