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Niobokupletskite

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Big Photo

Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
© Pavel M. Kartashov

Show Niobokupletskite Photos (10)



Formula:
K
 
2
Na(Mn,Zn,Fe)
 
7
(Nb,Zr,Ti)
 
2
Si
 
8
O
 
26
(OH)
 
4
(O,F)
System:TriclinicColour:Light yellow-brown, ...
Lustre:VitreousHardness:3 - 4
Member of:Astrophyllite Group
Name:Named for its Nb content and its relation to kupletskite.


Astrophyllite Group.

Classification of Niobokupletskite

IMA status:Approved
Strunz 8th edition ID:8/G.12-65
Nickel-Strunz 10th (pending) edition ID:9.DC.05

9 : SILICATES (Germanates)
D : Inosilicates
C : Inosilicates with branched 2-periodic single chains; Si2O6 + 2SiO3 Si4O12
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Type Occurrence of Niobokupletskite

Type Locality:Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada

Physical Properties of Niobokupletskite

Lustre:Vitreous
Colour:Light yellow-brown, silvery brown.
Hardness (Mohs):3 - 4

Crystallography of Niobokupletskite

Crystal System:Triclinic

Optical Data of Niobokupletskite

Type:Biaxial (+)
RI values: nα = 1.718 nβ = 1.733 nγ = 1.750
Maximum Birefringence:δ = 0.032

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v strong

Chemical Properties of Niobokupletskite

Formula:
K
 
2
Na(Mn,Zn,Fe)
 
7
(Nb,Zr,Ti)
 
2
Si
 
8
O
 
26
(OH)
 
4
(O,F)
Essential elements:H, K, Mn, Na, Nb, O, Si
All elements listed in formula:F, Fe, H, K, Mn, Na, Nb, O, Si, Ti, Zn, Zr

Relationship of Niobokupletskite to other Species

Member of:Astrophyllite Group
Other Members of Group:

- +
Astrophyllite
(K,Na)
 
3
(Fe,Mn)
 
7
Ti
 
2
Si
 
8
O
 
24
(O,OH)
 
7
Hydroastrophyllite
(H
 
3
O,K,Ca)
 
3
(Fe,Mn)
 
5-65
Ti
 
2
Si
 
8
(O,OH)
 
31
Kupletskite
(K,Na)
 
3
(Mn,Fe)
 
7
Ti
 
2
Si
 
8
O
 
26
(OH)
 
4
F
Kupletskite-(Cs)
(Cs,K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Ti,Nb)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
Magnesioastrophyllite
(Na,K)
 
4
Mg
 
2
(Fe,Fe,Mn)
 
5
Ti
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
Nalivkinite
Li
 
2
Na(Fe
2+
 
,Mn
2+
 
)
 
7
Ti
 
2
Si
 
8
O
 
26
(OH)
 
4
F
Niobophyllite
(K,Na)
 
3
(Fe,Mn)
 
6
(Nb,Ti)
 
2
Si
 
8
(O,OH,F)
 
31
Tarbagataite
(K□)Ca(Fe
2+
 
,Mn)
 
7
Ti
 
2
(Si
 
4
O
 
12
)
 
2
O
 
2
(OH)
 
5
Zircophyllite
(K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Zr,Ti)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
Related Minerals - Nickel-Strunz Grouping):

- +
9.DC.05Astrophyllite
(K,Na)
 
3
(Fe,Mn)
 
7
Ti
 
2
Si
 
8
O
 
24
(O,OH)
 
7
9.DC.05Hydroastrophyllite
(H
 
3
O,K,Ca)
 
3
(Fe,Mn)
 
5-65
Ti
 
2
Si
 
8
(O,OH)
 
31
9.DC.05Kupletskite
(K,Na)
 
3
(Mn,Fe)
 
7
Ti
 
2
Si
 
8
O
 
26
(OH)
 
4
F
9.DC.05Magnesioastrophyllite
(Na,K)
 
4
Mg
 
2
(Fe,Fe,Mn)
 
5
Ti
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
9.DC.05Niobophyllite
(K,Na)
 
3
(Fe,Mn)
 
6
(Nb,Ti)
 
2
Si
 
8
(O,OH,F)
 
31
9.DC.05Zircophyllite
(K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Zr,Ti)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
9.DC.05Kupletskite-(Cs)
(Cs,K,Na)
 
3
(Mn,Fe
2+
 
)
 
7
(Ti,Nb)
 
2
Si
 
8
O
 
24
(O,OH,F)
 
7
9.DC.05Nalivkinite
Li
 
2
Na(Fe
2+
 
,Mn
2+
 
)
 
7
Ti
 
2
Si
 
8
O
 
26
(OH)
 
4
F
9.DC.05Sveinbergeite
Ca(Fe
2+
6
Fe
3+
 
)Ti
 
2
(Si
 
4
O
 
12
)
 
2
O
 
2
(OH)
 
5
(H
 
2
O)
 
4

Other Names for Niobokupletskite

Synonyms:
IMA1999-032
Other Languages:
German:Niobokupletskit
Russian:Ниобокуплетскит
Spanish:Niobokupletskita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Niobokupletskite

Reference List:

- +
Canadian Mineralogist (2000): 38: 627-639.

Internet Links for Niobokupletskite

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    • Localities for Niobokupletskite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Québec
      • Montérégie
        • Rouville RCM
          • Mont Saint-Hilaire
    		Can.Min.(2000) 38, 627-639
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