Franconite (original) (raw)
A valid IMA mineral species
About FranconiteHide
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Formula:
Na(Nb2O5)(OH) · 3H2O
Colour:
White, colorless, grayish blue.
Lustre:
Adamantine, Vitreous, Silky
Crystal System:
Monoclinic
Name:
Named by J.L. Jambor, A.P. Sabina, A.C. Roberts, M. Bonardi, R.A. Ramik, and B.D. Sturman in 1984 for the type locality of Francon Quarry, Canada.
This page provides mineralogical data about Franconite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:1595:6
558c97de-312d-4c32-b4ce-bdd71c17ea31
IMA Classification of FranconiteHide
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IMA Formula:
NaNb2O5(OH) · 3H2O
Type description reference:
Jambor, John L., Sabina, A. P., Roberts, Andrew C., Bonardi, M., Ramik, R. A., Sturman, B. D. (1984) Franconite, a new hydrated Na-Nb oxide mineral from Montreal Island, Quebec. The Canadian Mineralogist, 22 (2) 239-243
Classification of FranconiteHide
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4.FM.15
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
M : Hydroxides with H2O +- (OH); unclassified
8.6.1.1
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
6 : (AB)6O11·nH2O
18.1.4
18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Fra | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of FranconiteHide
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Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Sorry, your browser doesn't support HTML5 audio. | Jolyon Ralph | United Kingdom |
Physical Properties of FranconiteHide
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Adamantine, Vitreous, Silky
Comment:
silky on fractures
Colour:
White, colorless, grayish blue.
Parting:
: Basal, parting.
Density:
2.72(1) g/cm3 (Measured) 2.71 g/cm3 (Calculated)
Optical Data of FranconiteHide
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RI values:
_n_α = 1.720 _n_β = 1.780 _n_γ = 1.790
δ = 0.070
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
r < v moderate
Chemistry of FranconiteHide
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Mindat Formula:
Na(Nb2O5)(OH) · 3H2O
Crystallography of FranconiteHide
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Crystal System:
Monoclinic
Cell Parameters:
a = 22.21 Å, b = 12.87 Å, c = 6.35 Å
β = 92.24°
Ratio:
a:b:c = 1.726 : 1 : 0.493
Unit Cell V:
1,813.71 ų (Calculated from Unit Cell)
Comment:
Point Group: n.d.; Space Group: n.d.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020435 | Franconite | Haring M M M, McDonald A M (2014) Franconite, NaNb2O5(OH)*3H2O: structure determination and the role of H bonding, with comments on the crystal chemistry of franconite-related minerals Mineralogical Magazine 78 591-607 | 2014 | Poudrette quarry, Quebec, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.0 Å | (100) |
| 5.55 Å | (70) |
| 4.73 Å | (60) |
| 3.18 Å | (60) |
| 4.21 Å | (50) |
| 3.21 Å | (50) |
| 2.626 Å | (50) |
Geological EnvironmentHide
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Type Occurrence of FranconiteHide
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General Appearance of Type Material:
White globules consists of radiating bladed crystals.
Place of Conservation of Type Material:
Geological Survey of Canada, Ottawa, 62094, 63748–63750.
Royal Ontario Museum, Toronto, Canada, M39041.
Associated Minerals at Type Locality:
Reference:
Jambor, J.L., Sabina, A.P., Roberts, A.C., Bonardi, M., Ramik, R.A., Sturman, B.D. (1984) Franconite, a new hydrated Na-Nb oxide mineral from Montreal Island, Quebec. The Canadian Mineralogist: 22: 239-243.
Download:
<Jambor, J.L., Sabina, A.P., Roberts, A.C., Bonardi, M., Ramik, R.A., Sturman, B.D. %281984%29 Franconite, a new hydrated Na-Nb oxide mineral from Montreal Island, Quebec. The Canadian Mineralogist: 22: 239-243.>
Synonyms of FranconiteHide
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Other Language Names for FranconiteHide
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Relationship of Franconite to other SpeciesHide
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Other Members of this group:
Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 4.FM. | Charleshatchettite | CaNb4O10(OH)2 · 8H2O | Mon. 2/m : _B_2/b |
|---|---|---|---|
| 4.FM. | Dinilawiite | [Pb4O2Al(OH)5]2(S2O3)2 · H2(S2O3)(H2O)5 | Mon. 2/m |
| 4.FM. | Yttrotungstite-(Nd) | NdW2O7(OH) · H2O | Mon. 2/m : _P_21/m |
| 4.FM.15 | Hochelagaite | (Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2O | Mon. |
| 4.FM.15 | Ternovite | (Mg,Ca)Nb4O11 · nH2O | Mon. |
| 4.FM.25 | Belyankinite | Ca1-2(Ti,Nb)5O12 · 9H2O (?) | Amor. |
| 4.FM.25 | Gerasimovskite | (Mn,Ca)(Nb,Ti)5O12 · 9H2O | Amor. |
| 4.FM.25 | Manganbelyankinite | (Mn,Ca)(Ti,Nb)5O12 · 9H2O | |
| 4.FM.30 | Silhydrite | Si3O6 · H2O | Orth. |
| 4.FM.35 | Cuzticite | Fe3+2(TeO6) · 3H2O | Hex. |
| 4.FM.50 | Qatranaite | CaZn2(OH)6(H2O)2 | Mon. 2/m : _P_21/b |
| 4.FM.55 | Hydroplumbite | 3PbO · H2O |
Fluorescence of FranconiteHide
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fluoresces pale yellow under LW UV, more intensely under SW UV.
Other InformationHide
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Notes:
Does not effervesce in HCl, and is not readily consumed by HCl.
Special Storage/
Display Requirements:
Dehydrates, reversibly
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 FranconiteHide
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References for FranconiteHide
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Reference List:
Jambor, John L., Sabina, A. P., Roberts, Andrew C., Bonardi, M., Ramik, R. A., Sturman, B. D. (1984) Franconite, a new hydrated Na-Nb oxide mineral from Montreal Island, Quebec. The Canadian Mineralogist, 22 (2) 239-243
Dunn, Pete J., Gobel, Volker, Grice, Joel D., Puziewicz, Jacek, Shigley, James E., Vanko, David A., Zilczer, Janet (1985) New mineral names. American Mineralogist, 70 (3-4) 436-441
Localities for FranconiteHide
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This 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.
Locality ListHide
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- 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 | |
|---|---|
| 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) |
Horváth et al. (1990) +1 other reference |
| Lajemmerais RCM Varennes & St-Amable ⓘ Saint-Amable sill | Horváth et al. (1998) |
| ⓘ Demix-Varennes quarry | Horváth et al. (1998) |
| Montréal ⓘ Francon quarry (TL) | 176-178. +3 other references |
| Russia | |
| Chelyabinsk Oblast ⓘ Vishnevye Mountains | Nikandrov (1989) +1 other reference |
| Murmansk Oblast Khibiny Massif ⓘ Kukisvumchorr Mt | Pekov et al. (2004) |
| Northern Karelia ⓘ Vuoriyarvi alkaline-ultrabasic massif | Subbotin et al. (1997) +2 other references |