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Hemloite Mineral Data
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General Hemloite Information
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 Chemical Formula: |
(As,Sb)2(Ti,V,Fe,Al)12O23OH |
| Composition: |
Molecular Weight = 1,050.40 gm |
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Titanium 27.35 % Ti 45.63 % TiO2 |
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Aluminum 2.57 % Al 4.85 % Al2O3 |
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Vanadium 14.55 % V 25.97 % V2O5 |
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Iron 10.63 % Fe 13.68 % FeO |
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Antimony 2.90 % Sb 3.47 % Sb2O3 |
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Arsenic 5.35 % As 7.06 % As2O3 |
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Hydrogen 0.10 % H 0.86 % H2O |
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Oxygen 36.56 % O |
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______ ______ |
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100.00 % 101.52 % = TOTAL OXIDE |
| Empirical Formula: |
As0.75Sb0.25Ti6V5+3Fe2+2AlO23(OH) |
| Environment: |
In a hydrothermal gold deposit. |
| IMA Status: |
Approved IMA 1988 |
| Locality: |
Hemlo gold deposit, Page-Williams mine, 3 km east of Hemlo, Thunder Bay district, Ontario, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Hemloite  |
| Synonym: |
ICSD 203124 |
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IMA1987-015 |
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PDF 46-1317 |
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Hemloite Image |
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Images:
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Hemloite
Comments: Coarse composite grain of hemloite surrounding rutile, with some alteration to titanite. The white grains are pyrite. (CanMin, v27:427).
Location: Drill core samples from the Hemlo gold deposit, Hemlo, Ontario, Canada.
Scale: See Image.
© Canadian Mineralogist |
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Hemloite Crystallography
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| Axial Ratios: |
a:b:c =0.4767:1:0.4518 |
| Cell Dimensions: |
a = 7.552, b = 15.842, c = 7.158, Z = 2; alpha = 78.36°, beta = 84.97°, gamma = 86.78° V = 834.21 Den(Calc)= 4.18 |
| Crystal System: |
Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.924(1), 2.665(0.9), 2.722(0.9), |
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Physical Properties of Hemloite
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| Cleavage: |
None |
| Color: |
Black, Dark gray, Dark brown. |
| Diaphaneity: |
Opaque |
| Fracture: |
Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern. |
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
| Hardness: |
6.5 - Pyrite |
| Luster: |
Sub Metallic |
| Streak: |
black |
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Optical Properties of Hemloite
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| Optical Data: |
Biaxial (?) |
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NCalc= 2.38 - from Gladstone-Dale relationship (KC = 0.3299) where Ncalc=Dcalc*KC+1
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| RL Anisotrophism: |
Very weak, dark gray to dark brown. |
| RL Color: |
Gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Hemloite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
18.90 |
20.50 |
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| 420 nm |
18.60 |
19.80 |
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| 440 nm |
18.20 |
19.10 |
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| 460 nm |
17.80 |
18.70 |
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| 480 nm |
17.60 |
18.40 |
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| 500 nm |
17.40 |
18.20 |
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| 520 nm |
17.20 |
18.00 |
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| 540 nm |
17.10 |
17.80 |
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| 560 nm |
17.00 |
17.70 |
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| 580 nm |
17.00 |
17.60 |
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| 600 nm |
16.90 |
17.50 |
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| 620 nm |
16.90 |
17.40 |
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| 640 nm |
16.80 |
17.40 |
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| 660 nm |
16.80 |
17.30 |
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| 680 nm |
16.80 |
17.30 |
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| 700 nm |
16.80 |
17.20 |
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Calculated Relative Intensity Colors of Hemloite in Air
Relative
Intensity |
0% |
60% |
100% |
120% |
180% |
240% |
300% |
360% |
420% |
480% |
520% |
| R1 |
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| R2 |
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Calculated Properties of Hemloite
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| Electron Density: |
Bulk Density (Electron Density)=3.95 gm/cc
note: Specific Gravity of Hemloite =4.18 gm/cc.
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| Fermion Index: |
Fermion Index = 0.03
Boson Index = 0.97 |
| Photoelectric: |
PEHemloite = 23.45 barns/electron
U=PEHemloite x rElectron Density= 92.65 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hemloite is Not Radioactive |
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Hemloite Classification
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| Dana Class: |
46.02.04.01 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites |
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(46.02)with miscellaneous formulae |
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(46.02.04)Dana Group |
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46.02.04.01 Hemloite (As,Sb)2(Ti,V,Fe,Al)12O23OH P1 1 |
| Strunz Class: |
04.JB.60 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.J - Arsenites, Antimonites, Bismuthites, Sulfites, |
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04.JB -Arsenites, antimonites, bismuthites; with additional anions, without H2O |
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04.JB.60 Hemloite (As,Sb)2(Ti,V,Fe,Al)12O23OH P1 1 |
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Other Hemloite Information
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.75,p1432,1990) OPTIC PROP.(AntBidBlaNic3) |
| See Also: |
Links to other databases for Hemloite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Hemloite
(As,Sb)2(Ti,V,Fe,Al)12O23OH
Dana No: 46.02.04.01 Strunz No: 04.JB.60
Locality:
Notes:
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