Formula: Mn2+2Ce(AsO4)(OH)4
Anhydrous arsenates with hydroxyl,
retzian group,
manganese- and cerium- bearing mineral
Specific gravity: 4.15 measured, 4.45 calculated
Hardness: 4
Streak: Light brown
Colour: Chocolate brown to chestnut-brown; brown in transmitted light
Solubility: Easily and completeley soluble in hydrochloric acid
Environments:
Retzian-(Ce) is an extremely rare arsenate.
At the type locality, the Moss mine, Filipstad, Värmland, Sweden, retzian-(Ce) occurs as Crystals 2-3 mm in length,
prismatic or thickly tabular in cavities in dolomite. Associated minerals include
pyrochroite, manganite,
jacobsite, dolomite and
braunite
(Mindat).
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