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
GUID
(UUID V4):
(UUID V4):
82abb90b-9f1a-4c9f-8fee-426b52e7a370
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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
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
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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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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:
Reference:
Hawthorne, F.C., Cooper, M.A., Grice, J.D., Roberts, A.C., Cook Jr., W.R., Lauf, R.J. (2002): Hubeite, a new mineral from the Daye mine, near Huangshi, Hubei Province, China. The Mineralogical Record, 33, 465-471.
Synonyms of Hubeite
Other Language Names for Hubeite
Common Associates
Associated Minerals Based on Photo Data:
215 photos of Hubeite associated with Inesite | Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O |
168 photos of Hubeite associated with Quartz | SiO2 |
62 photos of Hubeite associated with Calcite | CaCO3 |
62 photos of Hubeite associated with Pyrite | FeS2 |
50 photos of Hubeite associated with Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O |
38 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 | |
4 photos of Hubeite associated with Manganilvaite | CaFe2+Fe3+Mn2+(Si2O7)O(OH) |
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 | Ruizite | Ca2Mn3+2[Si4O11(OH)2](OH)2 · 2H2O |
9.BJ.35 | Taniajacoite | SrCaMn3+2Si4O11(OH)4 · 2H2O |
9.BJ.35 | Strontioruizite | Sr2Mn3+2Si4O11(OH)4 · 2H2O |
9.BJ.40 | Ardennite-(As) | Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6 |
9.BJ.40 | Ardennite-(V) | Mn2+4Al4(AlMg)(VO4)(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.45 | Kilchoanite | Ca6(SiO4)(Si3O10) |
9.BJ.50 | Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
9.BJ.50 | Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
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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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
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).
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.
All localities listed without proper references should be considered as questionable.
China (TL) | |
| Hawthorne et al. (2002) |
Romania | |
| Hîrtopanu P. et al. (2022) |
Sweden | |
| D. Holtstam (2020) |
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Fengjiashan Mine, Daye Co., Huangshi, Hubei, China