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Formula: Mn2+2Nd(AsO4)(OH)4
Anhydrous arsenates with hydroxyl,
retzian group,
manganese- and neodymium- bearing mineral
Crystal System: Orthorhombic
Specific gravity: 3.77 to 4.01 measured, 4.45 calculated
Hardness: 3 to 4
Streak: Very light brown
Colour: Pinkish brown to dark reddish brown
Luminescence: Not fluorescent under UV
Environments:
At the type locality, the Sterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA, retzian-(Nd) is
found with
rhodochrosite,
willemite,
sonolite, calcite,
baryte and
chlorophoenicite in three separate parageneses
(AM 67: 841-845).
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