Corrensite

Formula:  Clay mineral

Origin of name:  For Carl Correns, German mineralogist

Crystal system:  Unknown

Crystal class:  Unknown

Twinning:

Unit cell:

Colour:  Yellowish green

Diaphaneity:  Semitransparent

Luster:  Dull

Habit:

Hardness:

Specific gravity:

Cleavage:  None

Tenacity:

Streak:

Synonyms/varieties:

Comments:  A 1:1 interlayering of trioctahedral chlorite with trioctahedral smectite or vermiculite