Charleshatchettite
A valid IMA mineral species
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About Charleshatchettite
Charles Hatchett
Formula:
CaNb4O10(OH)2 · 8H2O
Colour:
White
Lustre:
Silky
Hardness:
4
Specific Gravity:
2.878 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Charles Hatchett (2 January 1765, London, UK – 10 March 1847, Chelsea, London, UK), chemist who discovered the element niobium.
Related to franconite and hochelagaite. Chemically similar to hochelagaite, but is distinguished from hochelagaite by its powder X‑ray diffraction patterns.
Charleshatchettite is a late-stage mineral, interpreted to have developed through the interaction of low-T (<150 °C) aqueous fluids with an alkali-, Nb-rich precursor under slightly reducing conditions and a highly alkaline pH (Haring et al. 2017)
Charleshatchettite is a late-stage mineral, interpreted to have developed through the interaction of low-T (<150 °C) aqueous fluids with an alkali-, Nb-rich precursor under slightly reducing conditions and a highly alkaline pH (Haring et al. 2017)
Unique Identifiers
Mindat ID:
46831
Long-form identifier:
mindat:1:1:46831:6
IMA Classification of Charleshatchettite
Approved
IMA Formula:
CaNb5+4O10(OH)2·8H2O
Approval year:
2015
First published:
2017
Classification of Charleshatchettite
4.FM.
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
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
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 for Standard |
|---|---|---|
| Chh | 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 Charleshatchettite
Silky
Transparency:
Transparent, Translucent
Colour:
White
Streak:
White
Hardness:
4 on Mohs scale
Hardness Data:
Estimated
Comment:
Could not be measured. Estimated based on similarities with hochelagaite.
Density:
2.878 g/cm3 (Calculated)
Comment:
Calculated for empirical formula.
Optical Data of Charleshatchettite
Type:
Biaxial (-)
Chemistry of Charleshatchettite
Mindat Formula:
CaNb4O10(OH)2 · 8H2O
Element Weights:
Elements listed:
Crystallography of Charleshatchettite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 21.151(4) Å, b = 6.496(1) Å, c = 12.714(3) Å
β = 103.958(3)°
β = 103.958(3)°
Ratio:
a:b:c = 3.256 : 1 : 1.957
Unit Cell V:
1,695.28 ų (Calculated from Unit Cell)
Morphology:
Globules (~0.15–0.20 mm in diameter) composed of radiating crystals with individual crystals having average dimensions of ~0.002 × 0.010 × 0.040 mm. Crystals are euhedral, bladed (flattened on [100]).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.308 Å | (100) |
| 4.731 Å | (39) |
| 4.832 Å | (38) |
| 3.262 Å | (25) |
| 3.193 Å | (25) |
| 3.108 Å | (24) |
| 4.556 Å | (16) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] |
Type Occurrence of Charleshatchettite
General Appearance of Type Material:
White globules (~0.15–0.20 mm in diameter) composed of radiating crystals with individual crystals having average dimensions of ~0.002 × 0.010 × 0.040 mm
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Canadian Museum of Nature, Gatineau, Quebec, Canada J9J 3N7, catalogue number CMNMC 86894.
Empirical Formula of Type Material:
(Ca1.00Mg0.04)Σ1.04(Nb3.62Ti0.32Si0.12Al0.02)Σ4.08O10(OH)2·8H2O
Chemical Analysis of Type Material:
| CaO | 7.96 % |
|---|---|
| MgO | 0.24 % |
| Al2O3 | 0.13 % |
| SiO2 | 1.04 % |
| TiO2 | 3.64 % |
| Nb2O5 | 68.07 % |
| H2O (calc) | 22.96 % |
| Total: | 104.04 % |
Geological Setting of Type Material:
On a fracture surface of a nepheline syenite.
Associated Minerals at Type Locality:
Synonyms of Charleshatchettite
Other Language Names for Charleshatchettite
Dutch:Charleshatchettiet
German:Charleshatchettit
Common Associates
Associations Based on Photo Data:
| 1 photo of Charleshatchettite associated with Donnayite-(Y) | NaCaSr3Y(CO3)6 · 3H2O |
| 1 photo of Charleshatchettite associated with Pyrite | FeS2 |
Related Minerals - Strunz-mindat Grouping
| 4.FM.15 | Franconite | Na(Nb2O5)(OH) · 3H2O |
| 4.FM.15 | Hochelagaite | (Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2O |
| 4.FM.15 | Ternovite | (Mg,Ca)Nb4O11 · nH2O |
| 4.FM.25 | Belyankinite | Ca1-2(Ti,Zr,Nb)5O12 · 9H2O (?) |
| 4.FM.25 | Gerasimovskite | Mn2+(Nb,Ti)5O12 · 9H2O (?) |
| 4.FM.25 | Manganbelyankinite | Mn2+(Ti,Nb)5O12 · 9H2O |
| 4.FM.30 | Silhydrite | Si3O6 · H2O |
| 4.FM.35 | Cuzticite | Fe3+2(TeO6) · 3H2O |
| 4.FM.50 | Qatranaite | CaZn2(OH)6(H2O)2 |
| 4.FM.55 | 'Hydroplumbite' | 3PbO · H2O |
Fluorescence of Charleshatchettite
Does not fluorescence under long-, medium-, or short-wave radiation. This is in contrast with visually similar franconite which typically does fluoresce.
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 Charleshatchettite
mindat.org URL:
https://www.mindat.org/min-46831.html
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References for Charleshatchettite
Reference List:
Hålenius, U.; Hatert, F.; Pasero, M.; Mills, S. J. (2015) New minerals and nomenclature modifications approved in 2015. Mineralogical Magazine, 79 (5). p.1223-1230. doi:10.1180/minmag.2015.079.5.16
Localities for Charleshatchettite
Showing 1 localities.
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.
Canada (TL) | |
| Hålenius et al. (2015) +1 other reference |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada