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Niobokupletskite Mineral Data

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General Niobokupletskite Information

Help on Chemical  Formula: Chemical Formula: K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F)
Help on Composition: Composition: Molecular Weight = 1,377.37 gm
   Potassium   5.68 %  K     6.84 % K2O
   Sodium      2.34 %  Na    3.15 % Na2O
   Zirconium   2.65 %  Zr    3.58 % ZrO2
   Titanium    1.04 %  Ti    1.74 % TiO2
   Manganese  21.54 %  Mn   27.81 % MnO
   Niobium     8.77 %  Nb   12.54 % Nb2O5
   Zinc        3.32 %  Zn    4.14 % ZnO
   Iron        2.03 %  Fe    2.61 % FeO
   Silicon    16.31 %  Si   34.90 % SiO2
   Hydrogen    0.29 %  H     2.62 % H2O
   Oxygen     35.89 %  O
   Fluorine    0.14 %  F     0.14 % F
                -   %   F    -0.06 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2Na1.4Mn2+5.4Zn0.7Fe2+0.5Nb1.3Zr0.4Ti0.3Si8O26.9(OH)4F0.1
Help on Environment: Environment: Nepheline syenite pegmatite at the Poudrette quarry. Epitaxially overgrown on kupletskite. Astrophyllite group
Help on IMA Status: IMA Status: Approved IMA 1999 (Dana # Added)
Help on Locality: Locality: Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Nb analog of kupletskite.
Help on Synonym: Synonym: ICSD 89859
  IMA1999-032
 

Niobokupletskite Image

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  Niobokupletskite   Kupletskite

Comments: Back-scattered electron image of Niobokupletskite (Nkpt) rimming kupletskite (Kpt). The zoning in the kupletskite is from Nb-poor to Nb-rich in the direction of the arrow (dark to medium gray). (CanMin v 38, p 628).
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Scale bar 100 µ-m.
© Canadian Mineralogist

Niobokupletskite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4554:1:0.9851
Help on Cell Dimensions: Cell Dimensions: a = 5.4303, b = 11.924, c = 11.747, Z = 1; alpha = 112.927°, beta = 94.75°, gamma = 103.175° V = 679.76 Den(Calc)= 3.36
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.707(1)(001), 3.536(0.5)(003), 2.587(0.4)(130),2.793(0.4)(131), 2.677(0.3)(211), 2.503(0.2)(212), 3.2
 

Physical Properties of Niobokupletskite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Beige, Brown.
Help on Density: Density: 3.325
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Niobokupletskite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2145,KPDmeas= 0.2207,KC= 0.2152
Ncalc = 1.72 - 1.74
Help on Optical Data: Optical Data: Biaxial (+), a=1.718, b=1.733, g=1.75, bire=0.0320
 

Calculated Properties of Niobokupletskite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.29 gm/cc
note: Specific Gravity of Niobokupletskite =3.42 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PENiobokupletskite = 25.66 barns/electron
U=PENiobokupletskite x relectron= 84.42 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 78.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Niobokupletskite per GRapi unit = 1.27 (%)

Estimated Radioactivity from Niobokupletskite - barely detectable

 

Niobokupletskite Classification

Help on  Dana Class: Dana Class: 69.01.01.08 (69)Inosilicate Chains with Side Branches or Loops
  (69.01)with (P=2, and N=4, 2 branches)
  (69.01.01)Astrophyllite group
 
69.01.01.01 Astrophyllite K2Na(Fe,Mn)7Ti2Si8O26(OH)4 P1 1
 
69.01.01.02 Kupletskite K2Na(Mn,Fe)7(Ti,Nb)2Si8O26(OH)4F C 2/c 2/m
 
69.01.01.03 Kupletskite-(Cs) (Cs,K)2Na(Mn,Fe,Li)7(Ti,Nb)2Si8O26(OH)4F P1 1
 
69.01.01.04 Niobophyllite K2Na(Fe,Mn)7(Nb,Ti)2Si8O26(OH)4(F,O) P1,P 1 Tri
 
69.01.01.05 Zircophyllite K2(Na,Ca)(Mn,Fe)7(Zr,Nb)2Si8O26(OH)4F P1 1
 
69.01.01.06 Hydroastrophyllite (H3O,K)2Ca(Fe,Mn)5-6Ti2Si8O26(OH)4F P1 1
 
69.01.01.07 Magnesioastrophyllite K2Na[Na(Fe,Fe,Mn)Mg2]Ti2Si8O26(OH)4F A2/m 2/m
 
69.01.01.08 Niobokupletskite! K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F) P1 1
 
69.01.01.09 Nalivkinite! Li2NaFe7Ti2Si8O24(OH)4F P1 1
Help on  Strunz Class: Strunz Class: 09.DC.05 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DC -Inosilicates with branched 2-periodic single chains Si2O6 + 2SiO3 � Si4O12
 
09.DC.05 Astrophyllite K2Na(Fe,Mn)7Ti2Si8O26(OH)4 P1 1
 
09.DC.05 Kupletskite-(Cs) (Cs,K)2Na(Mn,Fe,Li)7(Ti,Nb)2Si8O26(OH)4F P1 1
 
09.DC.05 Kupletskite K2Na(Mn,Fe)7(Ti,Nb)2Si8O26(OH)4F C 2/c 2/m
 
09.DC.05 Magnesioastrophyllite K2Na[Na(Fe,Fe,Mn)Mg2]Ti2Si8O26(OH)4F A2/m 2/m
 
09.DC.05 Hydroastrophyllite (H3O,K)2Ca(Fe,Mn)5-6Ti2Si8O26(OH)4F P1 1
 
09.DC.05 Niobophyllite K2Na(Fe,Mn)7(Nb,Ti)2Si8O26(OH)4(F,O) P1,P 1 Tri
 
09.DC.05 Nalivkinite! Li2NaFe7Ti2Si8O24(OH)4F P1 1
 
09.DC.05 Zircophyllite K2(Na,Ca)(Mn,Fe)7(Zr,Nb)2Si8O26(OH)4F P1 1
 
09.DC.05 Niobokupletskite! K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F) P1 1
 

Other Niobokupletskite Information

Help on References: References: NAME( AmMin, Vol 86) PHYS. PROP.(AmMin, Vol 86) OPTIC PROP.(AmMin, Vol 86)
Help on See Also: See Also: Links to other databases for Niobokupletskite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Niobokupletskite Specimen Label here :

Niobokupletskite

K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F)
Dana No: 69.01.01.08 Strunz No: 09.DC.05
Locality:

 

Notes:

 

 
   
 


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