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Formula: Ca2Be4Mg5(PO4)6(OH)4.6H2O
Hydrated phosphate, roscherite group,
beryllium-bearing mineral
Crystal System: Monoclinic
Specific gravity: 2.76 measured, 2.77 calculated
Hardness: 5
Streak: White
Colour: Pale to dark olive-green
Common impurities: Mn,Si
Environments:
Zanazziite is a rare beryllium-bearing phosphate.
At the type locality, the Ilha claim, Taquaral, Itinga, Minas Gerais, Brazil, zanazziite occurs in a
granite pegmatite associated with albite,
muscovite, wardite,
eosphorite, whiteite,
apatite, pyrite, manganese oxides,
roscherite, colourless quartz and
rose quartz (AM 76.1732, Dana, Mindat).
Zanazziite from the Ilha Claim - Image
At the Martin prospect, Newry, Maine, USA, zanazziite occurs with
fluorapatite and
albite (HOM).
At the Palermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA, rare zanazziite usually occurs as
acicular crystals to 1.5 mm; monoclinic prisms, bladed and barrel-shaped crystals, as well as spherical aggregates also
occur. The colour ranges from white to various shades of olive-green
(R&M 97.3.231).
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