Hemloite
A valid IMA mineral species
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Formula:
(Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH)
Colour:
Black
Lustre:
Metallic, Sub-Metallic
Hardness:
6½
Specific Gravity:
4.613 (Calculated)
Crystal System:
Triclinic
Name:
Named for the type locality, the Hemlo gold deposit, 35 km east of Marathon, Ontario, Canada.
This page provides mineralogical data about Hemloite.
Unique Identifiers
Mindat ID:
1861
Long-form identifier:
mindat:1:1:1861:2
GUID
(UUID V4):
(UUID V4):
1836fbee-eb0e-4887-8c5a-3a801340daf2
IMA Classification of Hemloite
Classification of Hemloite
4.JB.60
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
46.2.4.1
46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
2 : Miscellaneous
46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
2 : Miscellaneous
24.3.3
24 : Antimonates and Antimonites
3 : Antimonates of Ti and Pb
24 : Antimonates and Antimonites
3 : Antimonates of Ti and Pb
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 |
|---|---|---|
| Hlo | 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 Hemloite
Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Black
Hardness:
6½ on Mohs scale
Hardness:
VHN100=859 - 967 kg/mm2 - Vickers
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.613 g/cm3 (Calculated)
Comment:
Could not be measured due to inclusions.
Optical Data of Hemloite
Anisotropism:
Weak, dark grey to dark brown rotation-tints.
Bireflectance:
None observed.
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 18.9% | 20.5% |
| 420nm | 18.6% | 19.8% |
| 440nm | 18.2% | 19.1% |
| 460nm | 17.8% | 18.7% |
| 480nm | 17.6% | 18.4% |
| 500nm | 17.4% | 18.2% |
| 520nm | 17.2% | 18.0% |
| 540nm | 17.1% | 17.8% |
| 560nm | 17.0% | 17.7% |
| 580nm | 17.0% | 17.6% |
| 600nm | 16.9% | 17.5% |
| 620nm | 16.9% | 17.4% |
| 640nm | 16.8% | 17.4% |
| 660nm | 16.8% | 17.3% |
| 680nm | 16.8% | 17.3% |
| 700nm | 16.8% | 17.2% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 20.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray
Pleochroism:
Not Visible
Chemistry of Hemloite
Mindat Formula:
(Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH)
Common Impurities:
Al
Crystallography of Hemloite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.552 Å, b = 15.842 Å, c = 7.158 Å
α = 78.36°, β = 84.97°, γ = 86.78°
α = 78.36°, β = 84.97°, γ = 86.78°
Ratio:
a:b:c = 0.477 : 1 : 0.452
Unit Cell V:
834.88 ų (Calculated from Unit Cell)
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Big Balls | Small Balls | Just Balls | Spacefill
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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CIF File Best | x | y | z | a | b | c
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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) |
|---|---|---|---|---|---|---|---|
| 0005230 | Hemloite | Harris D C, Hoskins B F, Grey I E, Criddle A J, Stanley C J (1989) Hemloite (As,Sb)2(Ti,V,Fe,Al)12O23OH: A new mineral from the Hemlo gold deposit, Hemlo, Ontario, and its crystal structure The Canadian Mineralogist 27 427-440 |  | 1989 | Hemlo gold deposit, Hemlo, Ontario, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.924 Å | (100) |
| 2.722 Å | (90) |
| 2.665 Å | (90) |
| 2.799 Å | (80) |
| 3.045 Å | (70) |
| 2.498 Å | (70) |
| 1.774 Å | (60) |
Comments:
Hemlo deposit, Ontario, Canada. Data from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Hemloite
General Appearance of Type Material:
Subhedral to anhedral grains up to 400 x 600 µm in size.
Place of Conservation of Type Material:
The British Museum, London, specimen BM 1986, 512, polished section E.1210 and as drill core and polished sections in the Systematic Reference Series of the National Mineral Collection, Geological Survey of Canada, Ottawa, catalogue number NMC 65544.
Geological Setting of Type Material:
Gold deposit.
Associated Minerals at Type Locality:
Synonyms of Hemloite
Other Language Names for Hemloite
Related Minerals - Strunz-mindat Grouping
| 4.JB. | Cuyaite | Ca2Mn3+As3+14O24Cl |
| 4.JB. | Brattforsite | Mn19(AsO 3)12Cl2 |
| 4.JB.05 | Fetiasite | (Fe3+,Fe2+,Ti)3(As2O5)O2 |
| 4.JB.10 | Manganarsite | Mn3(As2O4)(OH)4 |
| 4.JB.15 | Magnussonite | Mn2+10(As3+O3)6(OH,Cl)2 |
| 4.JB.15 | UM1984-09-AsO:ClHMn | Mn10As6O18(OH)Cl |
| 4.JB.20 | Armangite | Mn2+26(AsO3)14(HAsO3)4(CO3) |
| 4.JB.25 | Nanlingite | Na(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14 |
| 4.JB.30 | Asbecasite | Ca3(Ti,Sn4+)Be2(AsO3)6(SiO4)2 |
| 4.JB.35 | Stenhuggarite | CaFeSb(AsO3)2O |
| 4.JB.40 | Trigonite | Pb3Mn2+(AsO3)2(HAsO3) |
| 4.JB.45 | Finnemanite | Pb5(AsO3)3Cl |
| 4.JB.50 | Gebhardite | Pb8(As2O5)2OCl6 |
| 4.JB.55 | Derbylite | Fe3+4Ti3Sb3+O13(OH) |
| 4.JB.55 | Tomichite | (V,Fe)4Ti3AsO13(OH) |
| 4.JB.55 | Graeserite | Fe3+4Ti3As3+O13(OH) |
| 4.JB.65 | Freedite | Cu+Pb8(AsO3)2O3Cl5 |
| 4.JB.70 | Georgiadesite | Pb4(As3+O3)Cl4(OH) |
| 4.JB.75 | Ekatite | (Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,HSiO4)2(OH)6 |
| 4.JB.75 | Szklaryite | ◻Al6BAs3+3O15 |
| 4.JB.85 | Lepageite | Mn2+3(Fe3+7Fe2+4)O3[Sb3+5As3+8O34] |
| 4.JB.90 | Bianchiniite | Ba2(TiV)(As2O5)2OF |
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 Hemloite
mindat.org URL:
https://www.mindat.org/min-1861.html
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References for Hemloite
Reference List:
Localities for Hemloite
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 | |
| HARRIS et al. (1989) +1 other reference |
| HARRIS et al. (1989) +1 other reference |
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Williams Mine, Hemlo gold deposit, Bomby Township, Thunder Bay District, Ontario, Canada