Nioboheftetjernite
A valid IMA mineral species
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About Nioboheftetjernite
Formula:
ScNbO4
Colour:
Black
Lustre:
Sub-Metallic
Hardness:
5½
Specific Gravity:
5.855 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named as an analogue of heftetjernite.
The Nb analogue of heftetjernite. Unique combination of elements (among the approved mineral species).
Found on a single specimen labelled as thortveitite in the collection of the Canadian Museum of Nature, Ottawa, Canada.
Might be related to a previously reported exsolution phase, (Sc,Fe3+)(Nb,Ta)O4, observed in Nb-rich rutile from pegmatites at Håverstad and Eptevann (Eptevatnet), Iveland, Norway (Černý et al. 2000, Černý & Chapman 2001) and to "Scandian Ixiolite (of von Knorring)" from Mozambique, and Scandian Ixiolite (of Bergstøl & Juve) from Heftetjern, Norway (Wise et al. 1998).
Found on a single specimen labelled as thortveitite in the collection of the Canadian Museum of Nature, Ottawa, Canada.
Might be related to a previously reported exsolution phase, (Sc,Fe3+)(Nb,Ta)O4, observed in Nb-rich rutile from pegmatites at Håverstad and Eptevann (Eptevatnet), Iveland, Norway (Černý et al. 2000, Černý & Chapman 2001) and to "Scandian Ixiolite (of von Knorring)" from Mozambique, and Scandian Ixiolite (of Bergstøl & Juve) from Heftetjern, Norway (Wise et al. 1998).
Unique Identifiers
Mindat ID:
54639
Long-form identifier:
mindat:1:1:54639:5
IMA Classification of Nioboheftetjernite
Approved
Approval year:
2020
First published:
2021
Classification of Nioboheftetjernite
4.DB.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Nhef | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Nioboheftetjernite
Sub-Metallic
Transparency:
Opaque
Colour:
Black
Hardness:
5½ on Mohs scale
Hardness Data:
Measured
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
5.855 g/cm3 (Calculated)
Chemistry of Nioboheftetjernite
Mindat Formula:
ScNbO4
Element Weights:
Elements listed:
Crystallography of Nioboheftetjernite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 4.7092(3) Å, b = 5.6531(4) Å, c = 5.0530(4) Å
β = 90.453(3)°
β = 90.453(3)°
Ratio:
a:b:c = 0.833 : 1 : 0.894
Unit Cell V:
134.515 ų
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.722 Å | (22) |
| 3.776 Å | (22) |
| 3.628 Å | (44) |
| 2.961 Å | (100) |
| 2.938 Å | (83) |
| 2.534 Å | (18) |
| 2.472 Å | (30) |
| 1.445 Å | (21) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Nioboheftetjernite
General Appearance of Type Material:
Anhedral grains and very crude elongated crystals up to 200 micron in length in intimately intergrowth with rossovskyite
ilmenite and rutile. Note: All four minerals are visually indistinguishable in hand sample.
ilmenite and rutile. Note: All four minerals are visually indistinguishable in hand sample.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Canadian Museum of Nature, 240 McLeod Street, Ottawa, Ontario, Canada, catalogue number CMNMC 51710
Empirical Formula of Type Material:
(Sc0.40Fe3+0.37Ti0.15Mn2+0.08)Σ1.00(Nb0.58Ta0.33W0.03Ti0.03Sn0.02)Σ0.99O4
Chemical Analysis of Type Material:
| MgO | 0.06 % |
|---|---|
| MnO | 2.49 % |
| Fe2O3 | 12.14 % |
| Sc2O3 | 11.34 % |
| TiO2 | 5.94 % |
| SnO2 | 1.45 % |
| Nb2O5 | 32.23 % |
| Ta2O5 | 29.93 % |
| WO3 | 3.38 % |
| Total: | 98.96 % |
Geological Setting of Type Material:
Granitic pegmatite, NYF type
Associated Minerals at Type Locality:
Synonyms of Nioboheftetjernite
Other Language Names for Nioboheftetjernite
Dutch:Nioboheftetjerniet
German:Nioboheftetjernit
Relationship of Nioboheftetjernite to other Species
Member of:
Other Members of Wolframite Group:
| Ferberite | FeWO4 | Mon. 2/m : P2/b |
| Heftetjernite | ScTaO4 | Mon. 2/m : P2/b |
| Huanzalaite | MgWO4 | Mon. 2/m : P2/b |
| Hübnerite | MnWO4 | Mon. 2/m : P2/b |
| Krasnoselskite | CoWO4 | Mon. |
| Rossovskyite | (Fe3+,Ta)(Nb,Ti)O4 | Mon. 2/m : P2/b |
| Sanmartinite | (Zn,Fe)WO4 | Mon. 2/m : P21/b |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.DB. | Nioboixiolite-(Mn2+) | (Nb0.67Mn2+0.33)O2 |
| 4.DB. | Shakhdaraite-(Y) | ScYNb2O8 |
| 4.DB.05 | Varlamoffite | Sn1-xFexO2-x(OH) |
| 4.DB.05 | Argutite | GeO2 |
| 4.DB.05 | Cassiterite | SnO2 |
| 4.DB.05 | Rutile | TiO2 |
| 4.DB.05 | Plattnerite | PbO2 |
| 4.DB.05 | Tripuhyite | Fe3+Sb5+O4 |
| 4.DB.05 | Tugarinovite | MoO2 |
| 4.DB.05 | Pyrolusite | Mn4+O2 |
| 4.DB.10 | Byströmite | MgSb2O6 |
| 4.DB.10 | Ordoñezite | ZnSb2O6 |
| 4.DB.10 | Tredouxite | NiSb2O6 |
| 4.DB.10 | Tapiolite-(Mn) | Mn2+Ta2O6 |
| 4.DB.10 | Tapiolite-(Fe) | Fe2+Ta2O6 |
| 4.DB.15a | Paramontroseite | V4+O2 |
| 4.DB.15a | Ramsdellite | Mn4+O2 |
| 4.DB.15b | Akhtenskite | ε-Mn4+O2 |
| 4.DB.15c | Nsutite | (Mn4+,Mn2+)(O,OH)2 |
| 4.DB.20 | Scrutinyite | α-PbO2 |
| 4.DB.20 | Nioboixiolite-([]) | (Nb0.8◻0.2)4+O2 |
| 4.DB.25 | Ishikawaite | U4+Fe2+Nb2O8 |
| 4.DB.25 | Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 |
| 4.DB.25 | Calciosamarskite | (Ca,U4+)Fe3+(Nb,Ta,Ti)2O8 |
| 4.DB.25 | Samarskite-(Yb) | YbFe3+(Nb,Ta)2O8 |
| 4.DB.25 | Ixiolite-(Fe2+) | (Ta0.67Fe2+0.33)O2 |
| 4.DB.25 | Ixiolite-(Mn2+) | (Ta0.67Mn2+0.33)O2 |
| 4.DB.25 | Srilankite | ZrTi2O6 |
| 4.DB.25 | Samarskite-(Y) | YFe3+Nb2O8 |
| 4.DB.25 | Nioboixiolite-(Fe3+) | (Nb0.5Fe3+0.5)O2 |
| 4.DB.30 va | Wolframite Group | |
| 4.DB.30 | Rossovskyite | (Fe3+,Ta)(Nb,Ti)O4 |
| 4.DB.30 | Huanzalaite | MgWO4 |
| 4.DB.30 | Heftetjernite | ScTaO4 |
| 4.DB.30 | Hübnerite | MnWO4 |
| 4.DB.30 | Sanmartinite | (Zn,Fe)WO4 |
| 4.DB.30 | Ferberite | FeWO4 |
| 4.DB.30 | Krasnoselskite | CoWO4 |
| 4.DB.35 | Qitianlingite | (Fe,Mn)2(Nb,Ta)2WO10 |
| 4.DB.35 | Tantalaeschynite-(Ce) | Ce(TiTa)O6 |
| 4.DB.35 | Tantalite-(Mg) | (Mg,Fe2+)(Ta,Nb)2O6 |
| 4.DB.35 | Columbite-(Mn) | Mn2+Nb2O6 |
| 4.DB.35 | Tantalite-(Mn) | Mn2+Ta2O6 |
| 4.DB.35 | Columbite-(Fe) | Fe2+Nb2O6 |
| 4.DB.35 | Columbite-(Mg) | (Mg,Fe,Mn)(Nb,Ta)2O6 |
| 4.DB.35 | Tantalite-(Fe) | Fe2+Ta2O6 |
| 4.DB.40 | Ferrotitanowodginite | Fe2+TiTa2O8 |
| 4.DB.40 | Wolframowodginite | Mn(Mn,Sn,Fe,Ta)(W,Ta,Nb)2O8 |
| 4.DB.40 | Lithiotantite | LiTa3O8 |
| 4.DB.40 | Lithiowodginite | LiTa3O8 |
| 4.DB.40 | Titanowodginite | Mn2+TiTa2O8 |
| 4.DB.40 | Tantalowodginite | (Mn2+0.5◻0.5)TaTa2O8 |
| 4.DB.40 | Wodginite | Mn2+Sn4+Ta2O8 |
| 4.DB.40 | Ferrowodginite | Fe2+Sn4+Ta2O8 |
| 4.DB.45 | Tivanite | V3+TiO3(OH) |
| 4.DB.50 | Carmichaelite | (Ti,Cr,Fe)[O2-x(OH)x] |
| 4.DB.55 | Alumotantite | AlTaO4 |
| 4.DB.60 | Biehlite | ((Sb,As)O)2[MoO4] |
Fluorescence of Nioboheftetjernite
Non-fluorescent
Other Information
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 Nioboheftetjernite
mindat.org URL:
https://www.mindat.org/min-54639.html
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External Links:
References for Nioboheftetjernite
Reference List:
Cerny, P., Chapman, R., Masau, M. (2000) Two-stage exsolution of a titanian (Sc,Fe3+)(Nb,Ta)O4 phase in niobian rutile from southern Norway. The Canadian Mineralogist, 38 (4) 907-913 doi:10.2113/gscanmin.38.4.907
Černý, Petr, Chapman, R. (2001) Exsolution and breakdown of scandian and tungstenian Nb-Ta-Ti-Fe-Mn phases in niobian rutile. The Canadian Mineralogist, 39 (1) 93-101 doi:10.2113/gscanmin.39.1.93
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) New mineral proposals approved in April 2020, CNMNC Newsletter 55. Mineralogical Magazine, 84 (3) 485-488 doi:10.1180/mgm.2020.39
Localities for Nioboheftetjernite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Madagascar (TL) | |
| Miyawaki et al. (2020) +1 other reference |
Poland | |
| SZEŁĘG E. et al. (Karkonosze massif, Lower Silesia, Poland) |
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Krucze Skały, Karpacz, Karkonosze County, Lower Silesian Voivodeship, Poland