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Formula: Na4Ca3Mg(PO4)4
Anhydrous phosphate
Crystal system: Orthorhombic
Specific gravity: 3.148 calculated
Hardness: 4 to 5
Streak: White
Colour: Colourless
Luminescence: No fluorescence under UV
Environments
Localities
At the type locality, Morasko meteorite, Poznań, Greater Poland Voivodeship, Poland, czochralskiite is a
very rare mineral occurring in phosphate inclusions (nodules) with
graphite rims enclosed in the
kamacite–taenite matrix of the
iron meteorite. Almost thirty mineral species have been
reported from this meteorite (most from various inclusions), including six, possibly eight, phosphates
(fluorapatite,
buchwaldite, brianite,
merrillite, moraskoite,
chlorapatite? and
whitlockite?), and
schreibersite, chromite,
bronzite, kosmochlor,
kosmochlor–augite,
olivine, albite,
orthoclase, quartz,
cohenite,
nickelphosphide, altaite,
troilite, pyrrhotite,
sphalerite, daubreelite,
djerfisherite and
native copper. Czochralskiite forms xenomorphic, usually oval grains and
amoeboid aggregates, between 0.1 and 0.5 mm in size. It is colourless and transparent, with a white streak and
vitreous lustre. It is interpreted as a primary phosphate,
which crystallised together with graphite and other phosphates inside the
nodules
(EJM 28.5.969-977).
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