pollucite – מילון אנגלי-עברי
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Pollucite
Pollucite is a
zeolite mineral with the formula (
Cs,
Na)
2Al2Si4O12·2
H2O with
iron,
calcium,
rubidium and
potassium as common substituting elements. It is important as a significant ore of
caesium and sometimes
rubidium. It forms a solid solution series with
analcime. It crystallizes in the
isometric - hexoctahedral crystal system as colorless, white, gray, or rarely pink and blue masses. Well formed crystals are rare. It has a Mohs hardness of 6.5 and a specific gravity of 2.9. It has a brittle fracture and no cleavage.
pollucite
Noun
1. a rare mineral that is an important source of cesium
(hypernym) mineral
(substance-meronym) cesium, caesium, Cs, atomic number 55
Pollucite
(n.)
A colorless transparent mineral, resembling quartz, occurring with castor or castorite on the island of Elba. It is a silicate of alumina and caesia. Called also pollux.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
About
Pollucite
General Information:
Chemical Formula:(Cs,Na)2Al2Si4O12·(H2O)
Environment:Granitic pegmatites.
IMA Status:Approved IMA
Locality:Elba, Italy
Name Origin:Named after Pollux, a figure from Greek mythology.
Physical Properties: Cleavage:None
Color:colorless, white, gray, pale pink, or blue.
Density:2.9
Diaphaniety:Transparent
Habits:Massive - Uniformly indistinguishable crystals forming large masses., ,
Hardness:6.5 - Pyrite
Luminescence:None.
Luster:Vitreous - Dull
Streak:white
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pollucite
