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Formula:
Mn2+2Fe3+3(PO4)3(OH)4(H2O)
Hydrated phosphate, rockbridgeite group,
manganese-bearing mineral
Crystal System: Monoclinic
Specific gravity: 3.40 calculated
Streak: Greyish green
Colour: Green
Environments
Manganrockbridgeite is a new mineral, approved in 2023 and to date (January 2024) reported only from the
type locality.
Localities
At the type locality, the Hagendorf South Pegmatite, Hagendorf, Waidhaus, Neustadt an der Waldnaab District, Upper
Palatinate, Bavaria, Germany, manganrockbridgeite forms compact intergrowths and clusters of shiny greenish black
blades up to 200 µm long and 20 µm wide but only a few micrometres thick. Associated minerals include
frondelite, kenngottite,
hureaulite, hematite,
quartz, correianevesite,
tavorite, switzerite,
bermanite, stewartite,
laueite and pseudolaueite
(Mindat).
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