Bariopharmacosiderite

Ba_0.5Al₄[(AsO₄)₃(OH)₄]·4H₂O 

Bariopharmacosiderite is a rare arsenate species that occurs as greenish, greenish-yellow or brown cubes. It is impossible to visually distinguish from pharmacosiderite.

Selected Australian Occurrences:

• Elsmore, New South Wales.
• Mount Malvern Mine, Mount Lofty Ranges, South Australia.
• Linton Mine, northeast Tasmania.
• Port Phillip Mine, Clunes, Victoria.