Hemloite Mineral Data

General Hemloite Information

Chemical Formula:

(As,Sb)2(Ti,V,Fe,Al)12O23OH

Composition:

Molecular Weight = 1,050.40 gm

Titanium 27.35 % Ti 45.63 % TiO₂

Aluminum 2.57 % Al 4.85 % Al₂O₃

Vanadium 14.55 % V 25.97 % V₂O₅

Iron 10.63 % Fe 13.68 % FeO

Antimony 2.90 % Sb 3.47 % Sb₂O₃

Arsenic 5.35 % As 7.06 % As₂O₃

Hydrogen 0.10 % H 0.86 % H₂O

Oxygen 36.56 % O

______ ______

100.00 % 101.52 % = TOTAL OXIDE

Empirical Formula:

As_0.75Sb_0.25Ti₆V⁵⁺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

IMA1987-015

PDF 46-1317

Hemloite Image

Images:

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

Hemloite Crystallography

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 - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.924(1), 2.665(0.9), 2.722(0.9),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
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Help on Above

Harris D C , Hoskins B F , Grey I E , Criddle A J , Stanley C J , The Canadian Mineralogist , 27 (1989) p.427-440, Hemloite (As,Sb)2(Ti,V,Fe,Al)12O23OH: A new mineral from the Hemlo gold, deposit, Hemlo, Ontario, and its crystal structure, Locality: Hemlo gold deposit, Hemlo, Ontario, Canada

Physical Properties of Hemloite

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

Optical Properties of Hemloite

Optical Data:

Biaxial (?)

NCalc= 2.38 - from Gladstone-Dale relationship (KC = 0.3299) where Ncalc=Dcalc*KC+1

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	∑ R₁(λ)	∑ R₂(λ)
400 nm	18.90	20.50
420 nm	18.60	19.80
440 nm	18.20	19.10
460 nm	17.80	18.70
480 nm	17.60	18.40
500 nm	17.40	18.20
520 nm	17.20	18.00
540 nm	17.10	17.80
560 nm	17.00	17.70
580 nm	17.00	17.60
600 nm	16.90	17.50
620 nm	16.90	17.40
640 nm	16.80	17.40
660 nm	16.80	17.30
680 nm	16.80	17.30
700 nm	16.80	17.20

**Calculated Relative Intensity Colors of Hemloite in Air**
Relative Intensity	0%	60%	100%	120%	180%	240%	300%	360%	420%	480%	520%
R₁
R₂

Calculated Properties of Hemloite

Electron Density:

Bulk Density (Electron Density)=3.95 gm/cc
note: Specific Gravity of Hemloite =4.18 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Hemloite= 23.45 barns/electron
U=PE_Hemloite x rElectron Density= 92.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hemloite is Not Radioactive

Hemloite Classification

Dana Class:

46.02.04.01 (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites

(46.02)with miscellaneous formulae

(46.02.04)Dana Group

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

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JB -Arsenites, antimonites, bismuthites; with additional anions, without H2O

04.JB.60 Hemloite (As,Sb)2(Ti,V,Fe,Al)12O23OH P1 1

Other Hemloite Information

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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Ask about Hemloite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Hemloite Specimen Label here :

Hemloite

(As,Sb)2(Ti,V,Fe,Al)12O23OH
Dana No: 46.02.04.01 Strunz No: 04.JB.60
Locality:

Notes: