Ajoite

Formula:  (K, Na)Cu₇AlSi₉O₂₄(OH)₆^.3H₂O

Origin of name:  locality; Ajo, Pima County, Arizona, USA

Crystal system:  Triclinic

Crystal class:  1 or -1

Twinning:

Unit cell:  a = 13.66 Å, b = 14.51 Å, c = 13.62 Å, a = 107.2°, b = 105.5°, g = 110.6°

Colour:  Bluish-green

Diaphaneity: Translucent

Luster: Vitreous

Habit:  Crystals platy or lath-like, tiny; usually massive

Hardness: 

Specific gravity:  2.96

Cleavage:  1; {010} perfect

Tenacity:

Streak: Greenish white

Synonyms/varieties:

Comments: Found in oxidised copper-rich base-metal deposits