Hubeite
A valid IMA mineral species
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About Hubeite
Formula:
Ca2Mn2+Fe3+Si4O12(OH) · 2H2O
Colour:
Dark brown to light brown in thinner crystals.
Lustre:
Vitreous
Hardness:
5½
Specific Gravity:
3.02
Crystal System:
Triclinic
Name:
Named in 2001 after the Hubei Province in China, where the type locality is located. Pronounced (HÜ-BĀ-ĪT).
Type Locality:
This page provides mineralogical data about Hubeite.
Unique Identifiers
Mindat ID:
8864
Long-form identifier:
mindat:1:1:8864:6
IMA Classification of Hubeite
Approved
Approval year:
2000
First published:
2002
Classification of Hubeite
9.BJ.60
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
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 |
|---|---|---|
| Hub | 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 Hubeite
Vitreous
Transparency:
Transparent
Colour:
Dark brown to light brown in thinner crystals.
Streak:
Light orange-brown
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
On (001)
On (001)
Parting:
None
Fracture:
Conchoidal
Density:
3.02(2) g/cm3 (Measured) 3.01 g/cm3 (Calculated)
Optical Data of Hubeite
Type:
Biaxial
RI values:
nα = 1.667(1) nβ = 1.679(1) nγ = 1.690(1)
2V:
Measured: 89° (2), Calculated: 87°
Max. Birefringence:
δ = 0.023
Based on recorded range of RI values above.
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.
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.
Surface Relief:
Moderate
Pleochroism:
Strong
Comments:
X = yellow-brown; Z = dark yellow brown.
Comments:
Absorption: Z > X.
X ∧ b = 20°, Y ∧ c = 13° (in α acute), Z = a.
X ∧ b = 20°, Y ∧ c = 13° (in α acute), Z = a.
Chemistry of Hubeite
Mindat Formula:
Ca2Mn2+Fe3+Si4O12(OH) · 2H2O
Element Weights:
Crystallography of Hubeite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 9.9653(3) Å, b = 13.9171(3) Å, c = 6.5703(2) Å
α = 133.264(1)°, β = 101.414(1)°, γ = 66.302(1)°
α = 133.264(1)°, β = 101.414(1)°, γ = 66.302(1)°
Ratio:
a:b:c = 0.716 : 1 : 0.472
Unit Cell V:
603.48 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Slightly elongate along the b axis with a rhombic cross section. Dominant forms {001}, {101} and minor {100}, {11}, and {352}.
Often in bow-tie shaped arrangements.
Often in bow-tie shaped arrangements.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0005941 | Hubeite | Cooper M A, Hawthorne F C (2004) The crystal structure of hubeite, a novel sorosilicate mineral The Canadian Mineralogist 42 825-834 |  | 2004 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.072 Å | (100) |
| 8.238 Å | (90) |
| 3.126 Å | (70) |
| 3.095 Å | (70) |
| 2.781 Å | (60) |
| 5.000 Å | (30) |
| 3.192 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] |
Type Occurrence of Hubeite
General Appearance of Type Material:
Radiating aggregates of intergrown crystals with well-developed terminations.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada, #83268.
Geological Setting of Type Material:
Manganiferous skarn.
Associated Minerals at Type Locality:
Synonyms of Hubeite
Other Language Names for Hubeite
Common Associates
Associated Minerals Based on Photo Data:
| 234 photos of Hubeite associated with Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
| 200 photos of Hubeite associated with Quartz | SiO2 |
| 80 photos of Hubeite associated with Calcite | CaCO3 |
| 72 photos of Hubeite associated with Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O |
| 71 photos of Hubeite associated with Pyrite | FeS2 |
| 41 photos of Hubeite associated with Apophyllite Group | AB4[Si8O22]X · 8H2O |
| 19 photos of Hubeite associated with Chalcopyrite | CuFeS2 |
| 7 photos of Hubeite associated with Fluorapophyllite | |
| 6 photos of Hubeite associated with Heulandite-Ca | (Ca,Na)5(Si27Al9)O72 · 26H2O |
| 4 photos of Hubeite associated with Hydroxyapophyllite-(K) | KCa4(Si8O20)(OH,F) · 8H2O |
Related Minerals - Strunz-mindat Grouping
| 9.BJ. | Arsenmedaite | Mn2+6 As5+Si5O18(OH) |
| 9.BJ.05 | Orientite | Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| 9.BJ.10 | Rosenhahnite | HCa3[Si3O9(OH)] |
| 9.BJ.15 | Trabzonite | Ca4(Si3O9)(OH)2 |
| 9.BJ.20 | Thalénite-(Y) | Y3Si3O10F |
| 9.BJ.25 | Tiragalloite | Mn2+4As5+Si3O12(OH) |
| 9.BJ.30 | Medaite | Mn2+6V5+Si5O18(OH) |
| 9.BJ.35 | Strontioruizite | Sr2Mn3+2Si4O11(OH)4 · 2H2O |
| 9.BJ.35 | Ruizite | Ca2Mn3+2[Si4O11(OH)2](OH)2 · 2H2O |
| 9.BJ.35 | Taniajacoite | SrCaMn3+2Si4O11(OH)4 · 2H2O |
| 9.BJ.40 | Ardennite-(As) | Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6 |
| 9.BJ.40 | Kannanite | Ca4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 |
| 9.BJ.40 | Alpeite | Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6 |
| 9.BJ.40 | Ardennite-(V) | Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 |
| 9.BJ.45 | Kilchoanite | Ca6(SiO4)(Si3O10) |
| 9.BJ.50 | Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| 9.BJ.50 | Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
| 9.BJ.55 | Zunyite | Al13Si5O20(OH,F)18Cl |
| 9.BJ.65 | Cassagnaite | (Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8 |
| 9.BJ.70 | Pavlovskyite | Ca8(SiO4)2(Si3O10) |
Fluorescence of Hubeite
none
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 Hubeite
mindat.org URL:
https://www.mindat.org/min-8864.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
References for Hubeite
Reference List:
Hawthorne, Frank C., Cooper, Mark A., Grice, Joel D., Roberts, Andrew C., Cook, William R., Lauf, Robert J. (2002) Hubeite, a New Mineral from the Daye Mine near Huangshi, Hubei Province, China. The Mineralogical Record, 33 (6) 465-471
Localities for Hubeite
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.
China (TL) | |
| Hawthorne et al. (2002) |
Romania | |
| Hîrtopanu P. et al. (2022) |
Sweden | |
| Holtstam (2020) |
Quick NavTopAbout HubeiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Fengjiashan Mine, Daye Co., Huangshi, Hubei, China