Andrianovite
Andrianovite is a very rare mineral of the eudialyte group, with formula Na12(K,Sr,Ce)6Ca6(Mn,Fe)3Zr3NbSi(Si3O9)2(Si9O27)2O(O,H2O,OH)5. The original formula was extended to show the presence of cyclic silicate groups and silicon at the M4 site, according to the nomenclature of eudialyte group. Andrianovite is unique among the eudialyte group in being potassium-rich (other eudialyte-group species with essential K are davinciite and rastsvetaevite). It is regarded as potassium analogue of kentbrooksite, but it also differs from it in being oxygen-dominant rather than fluorine-dominant. Also, the coordination number of Na in this representative is enlarged from 7 to 9. The name of the mineral honors Russian mathematician and crystallographer Valerii Ivanovich Andrianov.
primaryTopic
Andrianovite
Andrianovite is a very rare mineral of the eudialyte group, with formula Na12(K,Sr,Ce)6Ca6(Mn,Fe)3Zr3NbSi(Si3O9)2(Si9O27)2O(O,H2O,OH)5. The original formula was extended to show the presence of cyclic silicate groups and silicon at the M4 site, according to the nomenclature of eudialyte group. Andrianovite is unique among the eudialyte group in being potassium-rich (other eudialyte-group species with essential K are davinciite and rastsvetaevite). It is regarded as potassium analogue of kentbrooksite, but it also differs from it in being oxygen-dominant rather than fluorine-dominant. Also, the coordination number of Na in this representative is enlarged from 7 to 9. The name of the mineral honors Russian mathematician and crystallographer Valerii Ivanovich Andrianov.
has abstract
Andrianovite is a very rare mi ...... r Valerii Ivanovich Andrianov.
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Wikipage page ID
49,592,579
Wikipage revision ID
739,827,066
category
cleavage
color
dana
density
diaphaneity
fluorescence
formula
Na123Ca6Mn3Zr3Nb5
fracture
habit
intergrowths with eudialyte
impurities
luster
opticalprop
pleochroism
refractive
nω=1.62, nε=1.62
symmetry
system
Ditrigonal pyramidal class
tenacity
unit cell
a = 14.28, c = 30.24 [Å] ; Z = 3
subject
comment
Andrianovite is a very rare mi ...... r Valerii Ivanovich Andrianov.
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label
Andrianovite
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wasDerivedFrom
isPrimaryTopicOf
name
Andrianovite
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