Images
Formula: MgMn3+2(PO4)2(OH)2.4H2O
Hydrated phosphate, manganese-bearing mineral
Crystal system: Monoclinic
Specific gravity: 2.75 measured, 2.73 calculated
Hardness: 3½
Streak: Salmon-pink
Colour: Orange-red to brownish red
Luminescence: No fluorescence under UV
Environments
Magnesiobermanite is a relatively new mineral, approved in 2018 when it was found on a specimen collected from the White
Rock No.2 quarry in the 1960s. To date (July 2025) it has not been reported from any other locality.
Localities
At the type locality, the White Rock No. 2 pegmatite, White Rock Feldspar Mine, Old Boolcoomata Station, Bimbowrie Conservation
Park, Pastoral Unincorporated Area, South Australia, magnesiobermanite was found in the
granitic pegmatite as
twinned, bladed to tabular crystals, up to 0.3 mm long, forming aggregates up to 1.2 mm across. Magnesiobermanite occurs
in cavities in a matrix comprising quartz and hydrothermally altered dark brown to
black dufrénite group minerals
(dufrénite, natrodufrénite,
gayite and bimbowrieite) that have nearly
completely replaced earlier triplite. Associated minerals include
fluorapatite,
jahnsite-(NaFeMg), laueite,
leucophosphite, mitridatite,
perloffite and ushkovite
(Mindat).
Back to Minerals