Khomyakovite
Khomyakovite is an exceedingly rare mineral of the eudialyte group, with formula Na12Sr3Ca6Fe3Zr3WSi(Si9O27)2(Si3O9)2O(O,OH,H2O)3(OH,Cl)2. The original formula was extended to show the presence of both the cyclic silicate groups and M4-site silicon, according to the nomenclature of the eudialyte group. Some niobium substitutes for tungsten in khomyakovite. Khomyakovite is an iron-analogue of manganokhomyakovite, the second mineral being a bit more common. The two minerals are the only group representatives, beside taseqite, with species-defining strontium, although many other members display stronium diadochy. Khomyakovite is the third eudialyte-group mineral with essential tungsten (after johnsenite-(Ce) and manganokhomyakovite).
primaryTopic
Khomyakovite
Khomyakovite is an exceedingly rare mineral of the eudialyte group, with formula Na12Sr3Ca6Fe3Zr3WSi(Si9O27)2(Si3O9)2O(O,OH,H2O)3(OH,Cl)2. The original formula was extended to show the presence of both the cyclic silicate groups and M4-site silicon, according to the nomenclature of the eudialyte group. Some niobium substitutes for tungsten in khomyakovite. Khomyakovite is an iron-analogue of manganokhomyakovite, the second mineral being a bit more common. The two minerals are the only group representatives, beside taseqite, with species-defining strontium, although many other members display stronium diadochy. Khomyakovite is the third eudialyte-group mineral with essential tungsten (after johnsenite-(Ce) and manganokhomyakovite).
has abstract
Khomyakovite is an exceedingly ...... (Ce) and manganokhomyakovite).
@en
La khomyakovite è un minerale appartenente al gruppo dell'eudialite.
@it
Wikipage page ID
49,599,087
Wikipage revision ID
739,328,409
category
class
Ditrigonal pyramidal
color
Orange to orange-red
dana
density
diaphaneity
Transparent to translucent
formula
Na12Sr3Ca6Fe3Zr3W32
fracture
habit
luster
opticalprop
pleochroism
refractive
nω=1.63, nε=1.63
symmetry
system
tenacity
unit cell
a = 14.30, c = 30.08 [Å] ; Z = 3
subject
comment
Khomyakovite is an exceedingly ...... (Ce) and manganokhomyakovite).
@en
La khomyakovite è un minerale appartenente al gruppo dell'eudialite.
@it
label
Khomyakovite
@en
Khomyakovite
@it
wasDerivedFrom
isPrimaryTopicOf
name
Khomyakovite
@en