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Niobokupletskite

A valid IMA mineral species

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Niobokupletskite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Niobokupletskite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Niobokupletskite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Niobokupletskite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Niobokupletskite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Niobokupletskite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Niobokupletskite

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Niobokupletskite, etc.

Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

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About NiobokupletskiteHide

Formula:

K₂NaMn²⁺₇(NbTi)[Si₄O₁₂]₂O₂(OH)₄O

Colour:

Light yellow-brown, silvery brown.

Lustre:

Vitreous

Hardness:

3 - 4

Specific Gravity:

3.46 (Calculated)

Crystal System:

Triclinic

Member of:

Kupletskite Group > Astrophyllite Supergroup

Name:

Named for its Nb content and its relation to kupletskite.

Type Locality:

ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Astrophyllite Group.

Unique IdentifiersHide

Mindat ID:

7098

Long-form identifier:

mindat:1:1:7098:6

IMA Classification of NiobokupletskiteHide

IMA status:

Approved

IMA Formula:

K₂NaMn²⁺₇(Nb⁵⁺,Ti⁴⁺)₂(Si₄O₁₂)₂O₂(OH)₄(O,F)

Approval year:

1999

First published:

2000

Classification of NiobokupletskiteHide

Strunz-mindat (2026):

9.DC.05

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Symbol	Source	Reference for Standard
Nbk	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Nbk	Warr (2020)	Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30

Physical Properties of NiobokupletskiteHide

Lustre:

Vitreous

Transparency:

Transparent

Colour:

Light yellow-brown, silvery brown.

Hardness:

3 - 4 on Mohs scale

Tenacity:

Brittle

Cleavage:

Perfect
Perfect {001}

Fracture:

Irregular/Uneven, Splintery

Density:

3.46 g/cm³ (Calculated)

Comment:

Experimentally sinks in methylene iodide that has a density of 3.325 g/cm3.

Optical Data of NiobokupletskiteHide

Type:

Biaxial (+)

RI values:

n_α = 1.718(1) n_β = 1.733(1) n_γ = 1.750

Max. Birefringence:

δ = 0.032
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Thickness: 30 µm Order divisions

Rotation:

Surface Relief:

Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.

Focus:

In focus

Interference Figure:

This shows the idealized biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.

No measured or calculated 2V is on file for this mineral, so the value used here (87°) is estimated from its recorded refractive indices and optic sign, not from a direct 2V measurement.

Thickness: 30 µm

Stage rotation: 0°

Dispersion:

r > v strong

Optical Extinction:

Z = c; X and Y in the (001) plane.

Pleochroism:

Visible

Comments:

X ≈ Y = light orange-yellow; Z = red-brown.

Comments:

γ calculated.

Chemistry of NiobokupletskiteHide

Mindat Formula:

K₂NaMn²⁺₇(NbTi)[Si₄O₁₂]₂O₂(OH)₄O

Element Weights:

Element	% weight
O	36.706 %
Mn	28.461 %
Si	16.628 %
Nb	6.876 %
K	5.787 %
Ti	3.543 %
Na	1.701 %
H	0.298 %

Calculated from ideal end-member formula.

Elements listed:

H, K, Mn, Na, Nb, O, Si, Ti - search for minerals with similar chemistry

Crystallography of NiobokupletskiteHide

Crystal System:

Triclinic

Class (H-M):

1 - Pinacoidal

Space Group:

Setting:

Cell Parameters:

a = 5.4303 Å, b = 11.924 Å, c = 11.747 Å
α = 112.927°, β = 94.750°, γ = 103.175°

Ratio:

a:b:c = 0.455 : 1 : 0.985

Unit Cell V:

669.5 Å³

Morphology:

Three types described from type description:
Type-I = anhedral to subhedral, platy to tabular, light beige to yellow epitaxic overgrowths on primary, dark brown kupletskite.
Type-II = as a dense, fibrous, light yellow-brown overgrowth on coarse-grained primary kupletskite.
Type-III = as an overgrowth on primary kupletskite as very fine-grained bronze to silvery brown acicular crystals in sheaf-like aggregates, originally described as “witch’s broom astrophyllite”.

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

View
CIF File Best | x | y | z | a | b | c

Rotation
Stop | Start

Labels
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0005821	Niobokupletskite	Piilonen P C, McDonald A M, Lalonde A E (2003) Insights into astrophyllite-group minerals II: Crystal chemistry The Canadian Mineralogist 41 27-54		2003	nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada	0	293
0005648	Niobokupletskite	Piilonen P C, Lalonde A E, McDonald A M, Gault R A (2000) Niobokupletskite, a new astrophyllite-group mineral from Mont Saint-Hilaire, Quebec, Canada: Description and crystal structure The Canadian Mineralogist 38 627-639		2000	Mont Saint-Hilaire, Quebec, Canada	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Niobokupletskite'
loop_
_publ_author_name
'Piilonen P C'
'McDonald A M'
'Lalonde A E'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 41 
_journal_year 2003
_journal_page_first 27
_journal_page_last 54
_publ_section_title
;
 Insights into astrophyllite-group minerals II: Crystal chemistry
 Sample: MSH42
;
_database_code_amcsd 0005821
_chemical_compound_source 'nepheline syenite pegmatite at Mont Saint-Hilaire, Quebec, Canada'
_chemical_formula_sum 'Mn5.65 Na.63 Zn.67 (Nb1.8 Ti.2) Si8 K1.78 Rb.13 O30.5 H4'
_cell_length_a 5.4303
_cell_length_b 11.924
_cell_length_c 11.747
_cell_angle_alpha 112.927
_cell_angle_beta 94.750
_cell_angle_gamma 103.175
_cell_volume 669.497
_exptl_crystal_density_diffrn      3.331
_symmetry_space_group_name_H-M 'P -1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Mn(1)   0.85110   0.20570   0.47940   0.91000   0.01060
Na   0.85110   0.20570   0.47940   0.09000   0.01060
Mn(2)   0.27900   0.06800   0.48710   0.90000   0.01150
Zn(2)   0.27900   0.06800   0.48710   0.10000   0.01150
Mn(3)   0.42110   0.35120   0.48440   0.85000   0.01190
Zn(3)   0.42110   0.35120   0.48440   0.15000   0.01190
Mn(4)   0.00000   0.50000   0.50000   0.33000   0.01100
Zn(4)   0.00000   0.50000   0.50000   0.17000   0.01100
Nb   0.07490   0.08180   0.18650   0.90000   0.01000
Ti   0.07490   0.08180   0.18650   0.10000   0.01000
Si(1)   0.67860   0.27450   0.23140   1.00000   0.01200
Si(2)   0.81330   0.54700   0.25260   1.00000   0.01220
Si(3)   0.37650   0.67370   0.25520   1.00000   0.01330
Si(4)   0.50700   0.92960   0.23620   1.00000   0.01030
K(1a)   0.09700   0.27800   0.99500   0.41000   0.04330
K(1b)   0.16400   0.27540   0.99560   0.48000   0.04330
Rb(1b)   0.16400   0.27540   0.99560   0.06500   0.04330
Na   0.50000   0.00000   0.00000   0.45000   0.01790
O(1)   0.72800   0.31940   0.38320   1.00000   0.01260
O(2)   0.14600   0.16000   0.36820   1.00000   0.01580
O(3)   0.13000   0.39310   0.59490   1.00000   0.00880
O-H(4)   0.29500   0.46310   0.39910   1.00000   0.01340
O-H(5)   0.99300   0.11790   0.59440   1.00000   0.01390
O(6)   0.55900   0.25760   0.59150   1.00000   0.00960
O(7)   0.57300   0.01340   0.38650   1.00000   0.01020
O(8)   0.07200   0.59150   0.20040   1.00000   0.02350
O(9)   0.25000   0.04300   0.82600   1.00000   0.04860
O(10)   0.43300   0.41440   0.79880   1.00000   0.02540
O(11)   0.12900   0.80300   0.82970   1.00000   0.04340
O(12)   0.26700   0.95400   0.17230   1.00000   0.04980
O(13)   0.26600   0.60620   0.80750   1.00000   0.02660
O(14)   0.57100   0.22060   0.80240   1.00000   0.03110
O(15)   0.38500   0.19700   0.16930   1.00000   0.04310
O(16)   0.00000   0.00000   0.00000   0.50000   0.01720
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Mn(1) 0.00260 0.01380 0.01630 0.00310 0.00270 0.00670
Na 0.00260 0.01380 0.01630 0.00310 0.00270 0.00670
Mn(2) 0.00380 0.01640 0.01740 0.00390 0.00440 0.00910
Zn(2) 0.00380 0.01640 0.01740 0.00390 0.00440 0.00910
Mn(3) 0.00430 0.01540 0.01850 0.00350 0.00430 0.00880
Zn(3) 0.00430 0.01540 0.01850 0.00350 0.00430 0.00880
Mn(4) 0.00130 0.01310 0.01660 -0.00040 0.00200 0.00550
Zn(4) 0.00130 0.01310 0.01660 -0.00040 0.00200 0.00550
Nb 0.00040 0.01330 0.01780 0.00260 0.00370 0.00770
Ti 0.00040 0.01330 0.01780 0.00260 0.00370 0.00770
Si(1) 0.00680 0.01860 0.01540 0.00600 0.00450 0.01030
Si(2) 0.00950 0.01360 0.01460 0.00240 0.00230 0.00760
Si(3) 0.00890 0.01670 0.01490 0.00180 0.00090 0.00840
Si(4) 0.00490 0.01080 0.01390 0.00180 0.00210 0.00470
Na 0.01480 0.02000 0.01470 0.00330 -0.00110 0.00460
O(1) 0.00280 0.02260 0.01650 0.00730 0.00330 0.01020
O(2) 0.01340 0.01670 0.01760 0.00450 0.00210 0.00740
O-H(4) 0.01020 0.02100 0.01460 0.01140 0.00740 0.00840
O-H(5) 0.01040 0.01330 0.01420 0.00130 0.00670 0.00230
O(6) 0.00240 0.01610 0.01070 0.00190 0.00240 0.00600
O(7) 0.00370 0.00740 0.01840 -0.00110 0.00000 0.00610
O(8) 0.01840 0.02840 0.02220 0.00360 0.01310 0.00910
O(9) 0.02680 0.05970 0.02100 -0.03370 0.00510 0.00300
O(10) 0.02150 0.03590 0.01860 0.01160 0.00220 0.00980
O(11) 0.06830 0.05950 0.02380 0.05340 0.00220 0.01820
O(12) 0.07090 0.05160 0.01850 0.05260 -0.01890 -0.00780
O(13) 0.05080 0.01060 0.01400 0.00770 0.00350 0.00180
O(14) 0.05680 0.00880 0.02060 -0.00140 0.00290 0.00580
O(15) 0.03080 0.05590 0.02400 -0.02470 -0.00560 0.02020
O(16) 0.00760 0.02770 0.02130 0.00960 0.00650 0.01210

Epitaxial Relationships of NiobokupletskiteHide

Epitaxial Minerals:

'Kupletskite'

K₂NaMn²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
10.707 Å	(100)
4.405 Å	(20)
3.536 Å	(50)
3.294 Å	(20)
2.793 Å	(40)
2.677 Å	(30)
2.587 Å	(40)

Comments:

Poudrette quarry, Mont Saint-Hilaire, Québec, Canada. The data are from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4b: Highly evolved igneous rocks	>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of NiobokupletskiteHide

Type Locality:

ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

General Appearance of Type Material:

Anhedral to subhedral, platy to tabular, light beige to yellow epitaxic overgrowths on primary, dark brown kupletskite.

Place of Conservation of Type Material:

Canadian Museum of Nature, Ottawa, Ontario, Canada, number CMNMC 82924 (holotype).

Geological Setting of Type Material:

Nepheline syenite pegmatites. Late stage mineral.

Associated Minerals at Type Locality:

Synonyms of NiobokupletskiteHide

IMA1999-032

Other Language Names for NiobokupletskiteHide

Dutch:Niobokupletskiet

German:Niobokupletskit

Russian:Ниобокуплетскит

Spanish:Niobokupletskita

Relationship of Niobokupletskite to other SpeciesHide

Member of:

Kupletskite Group > Astrophyllite Supergroup

Other Members of Kupletskite Group:

Heyerdahlite	Na₂NaMn²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F(H₂O)₂	Tric. 1 : P1
Kupletskite	K₂NaMn²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F	Tric. 1 : P1
Kupletskite-(Cs)	Cs₂NaMn²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F	Tric. 1 : P1
Laverovite	K₂NaMn²⁺₇Zr₂[Si₄O₁₂]₂O₂(OH)₄F	Tric. 1 : P1

Common AssociatesHide

Associations Based on Photo Data:

13 photos of Niobokupletskite associated with Franconite	Na(Nb₂O₅)(OH) · 3H₂O
13 photos of Niobokupletskite associated with Aegirine	NaFe³⁺Si₂O₆
9 photos of Niobokupletskite associated with Albite	Na(AlSi₃O₈)
6 photos of Niobokupletskite associated with Kupletskite	K₂NaMn²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F
3 photos of Niobokupletskite associated with Nepheline	Na₃K(Al₄Si₄O₁₆)
2 photos of Niobokupletskite associated with Adamsite-(Y)	NaY[CO₃]₂ · 6H₂O
2 photos of Niobokupletskite associated with Astrophyllite Supergroup	A_2pB_rC₇D₂(T₄O₁₂)₂X^o_d2X^oA₄X^p_dnW_a2
2 photos of Niobokupletskite associated with Wurtzite	(Zn,Fe)S
1 photo of Niobokupletskite associated with Thomasclarkite-(Y)	(Na,Ce)(Y,REE)(HCO₃)(OH)₃ · 4H₂O
1 photo of Niobokupletskite associated with Catapleiite	Na₂Zr(Si₃O₉) · 2H₂O

Related Minerals - Strunz-mindat Grouping Hide

9.DC.	Bulgakite	Li₂CaFe²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄O(H₂O)₂	Tric. 1 : P1
9.DC.05	Devitoite	Ba₄Ba₂Fe²⁺₇Fe³⁺₂[Si₄O₁₂]₂[PO₄]₂[CO₃]O₂(OH)₄◻₂	Tric. 1 : P1
9.DC.05	Zircophyllite	K₂NaFe²⁺₇Zr₂[Si₄O₁₂]₂O₂(OH)₄F	Tric.
9.DC.05	Nalivkinite	Li₂NaFe²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F(H₂O)₂	Tric. 1 : P1
9.DC.05	Sveinbergeite	(H₂O)₂[Ca(H₂O)](Fe²⁺₆Fe³⁺)Ti₂[Si₄O₁₂]₂O₂(OH)₄[(OH)(H₂O)]	Tric. 1 : P1
9.DC.05	Niobophyllite	K₂NaFe²⁺₇(NbTi)[Si₄O₁₂]₂O₂(OH)₄O	Tric.
9.DC.05	Heyerdahlite	Na₂NaMn²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F(H₂O)₂	Tric. 1 : P1
9.DC.05	Tarbagataite	(K◻)CaFe²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄(OH)	Tric. 1 : P1
9.DC.05	Astrophyllite	K₂NaFe²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F	Tric. 1 : P1
9.DC.05	'Hydroastrophyllite'	[H₃O]⁺₂CaFe²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄O	Tric.
9.DC.05	Lobanovite	K₂Na(Fe²⁺₄Mg₂Na)Ti₂[Si₄O₁₂]₂O₂(OH)₄◻	Mon. 2/m : B2/m
9.DC.05	Kupletskite-(Cs)	Cs₂NaMn²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F	Tric. 1 : P1
9.DC.05	Kupletskite	K₂NaMn²⁺₇Ti₂[Si₄O₁₂]₂O₂(OH)₄F	Tric. 1 : P1
9.DC.05	Laverovite	K₂NaMn²⁺₇Zr₂[Si₄O₁₂]₂O₂(OH)₄F	Tric. 1 : P1

RadioactivityHide

Radioactivity:

Element	% Content	Activity (Bq/kg)	Radiation Type
Uranium (U)	0.0000%	0	α, β, γ
Thorium (Th)	0.0000%	0	α, β, γ
Potassium (K)	5.7871%	1,794	β, γ

For comparison:

Banana: ~15 Bq per fruit
Granite: 1,000–3,000 Bq/kg
EU exemption limit: 10,000 Bq/kg

Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.

Interactive Simulator:

Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!

Mass of radioactive mineral:

Shielding material:

Activity: –

Distance	Dose rate	Risk
1 cm
10 cm
1 m

The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μ_shield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).

D = ((A_U × Γ_U) + (A_Th × Γ_Th) + (A_K × Γ_K)) / r² × μ_shield

Other InformationHide

Health Risks:

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

Internet Links for NiobokupletskiteHide

mindat.org URL:

https://www.mindat.org/min-7098.html
Please feel free to link to this page.

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References for NiobokupletskiteHide

Reference List:

Piilonen, P. C., Lalonde, A. E., McDonald, A. M., Gault, R. A. (2000) Niobokupletskite, a new astrophyllite-group mineral from Mont Saint-Hilaire, Quebec, Canada: Description and crystal structure. The Canadian Mineralogist, 38 (3) 627-639 doi:10.2113/gscanmin.38.3.627

Jambor, J.L. and Roberts, A.C. (2001) New mineral names. American Mineralogist: 86: 197-200.

Sokolova, Elena, Cámara, Fernando, Hawthorne, Frank C., Ciriotti, Marco E. (2017) The astrophyllite supergroup: nomenclature and classification. Mineralogical Magazine, 81 (1) 143-153 doi:10.1180/minmag.2016.080.077

(2021) Niobokupletskite. Handbook of Mineralogy. Mineralogical Society of America

Localities for NiobokupletskiteHide

Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

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Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Canada (TL)
Québec Montérégie La Vallée-du-Richelieu RCM Mont Saint-Hilaire ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH) (TL)	Piilonen et al. (2000) +1 other reference

India
West Bengal Purulia District ⓘ Sushina Hill	Chakrabarty et al. (2018)

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Niobokupletskite

About NiobokupletskiteHide

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IMA Classification of NiobokupletskiteHide

Classification of NiobokupletskiteHide

Mineral SymbolsHide

Physical Properties of NiobokupletskiteHide

Optical Data of NiobokupletskiteHide

Chemistry of NiobokupletskiteHide

Crystallography of NiobokupletskiteHide

Crystal StructureHide

Epitaxial Relationships of NiobokupletskiteHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of NiobokupletskiteHide

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Relationship of Niobokupletskite to other SpeciesHide

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Related Minerals - Strunz-mindat GroupingHide

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