Kentbrooksite
Kentbrooksite is a moderately rare mineral of the eudialyte group, with chemical formula (Na,REE)15(Ca,REE)6Mn3Zr3NbSi[(Si9O27)2(Si3O9)2O2]F2·2H2O. This extended formula shows the presence of cyclic silicate groups and dominance of Si at the M4 site, according to the nomenclature of the eudialyte group. The characteristic features of kentbrooksite, that make it different from eudialyte are: (1) dominancy of fluorine (the only currently known example among the whole group), (2) dominancy of manganese, and (3) dominancy of niobium. Trace hafnium and magnesium are also reported. Kentbrooksite is relatively common when compared to most other species of the group.
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Kentbrooksite
Kentbrooksite is a moderately rare mineral of the eudialyte group, with chemical formula (Na,REE)15(Ca,REE)6Mn3Zr3NbSi[(Si9O27)2(Si3O9)2O2]F2·2H2O. This extended formula shows the presence of cyclic silicate groups and dominance of Si at the M4 site, according to the nomenclature of the eudialyte group. The characteristic features of kentbrooksite, that make it different from eudialyte are: (1) dominancy of fluorine (the only currently known example among the whole group), (2) dominancy of manganese, and (3) dominancy of niobium. Trace hafnium and magnesium are also reported. Kentbrooksite is relatively common when compared to most other species of the group.
has abstract
Kentbrooksita silikato motako minerala da eta eudialyte taldearen kidea da.
@eu
Kentbrooksite is a moderately ...... st other species of the group.
@en
La kentbrooksita és un mineral ...... va recollir l'espècimen tipus.
@ca
La kentbrooksite è un minerale appartenente al gruppo dell'eudialite.
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Wikipage page ID
49,599,512
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1,012,380,655
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category
class
Ditrigonal pyramidal
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cleavage
None
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color
Yellow-brown
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dana
density
diaphaneity
Transparent
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fracture
Uneven
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habit
aggregates
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luster
Vitreous
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name
Kentbrooksite
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opticalprop
Uniaxial
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Other
pleochroism
None
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refractive
nω=1.63, nε=1.62
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streak
White
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strunz
(8/E.23-20 )
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symmetry
system
tenacity
Brittle
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unit cell
a = 14.24, c = 30.03 [Å] ; Z = 3
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wikiPageUsesTemplate
subject
comment
Kentbrooksita silikato motako minerala da eta eudialyte taldearen kidea da.
@eu
Kentbrooksite is a moderately ...... st other species of the group.
@en
La kentbrooksita és un mineral ...... va recollir l'espècimen tipus.
@ca
La kentbrooksite è un minerale appartenente al gruppo dell'eudialite.
@it
label
Kentbrooksita
@ca
Kentbrooksita
@eu
Kentbrooksite
@en
Kentbrooksite
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wasDerivedFrom
isPrimaryTopicOf
name
Kentbrooksite
@en