Hemloite Mineral Data

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.

Synonym:

ICSD 203124

IMA1987-015

PDF 46-1317

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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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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.

Diaphaniety:

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:

r_electron=3.95 gm/cc
note: r_Hemloite=4.18 gm/cc.

Fermion Index

Fermion Index = 0.03815
Boson Index = 0.96185

Photoelectric:

PE_Hemloite= 23.45 barns/electron
U=PE_Hemloite x r_electron= 92.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hemloite is Not Radioactive

Hemloite Classification

Dana Class:

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

(46.2)with miscellaneous formulae

(46.2.4)Dana Group

46.2.4.1 Hemloite (As,Sb)2(Ti,V,Fe,Al)12O23OH P1 1

Strunz Class:

IV/C.23-10 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.23 - Hemloite - Derbylite series

IV/C.23-10 Hemloite (As,Sb)2(Ti,V,Fe,Al)12O23OH P1 1

IV/C.23-15 Graeserite! (Fe,Ti)4Ti3AsO13(OH) A2/m 2/m

IV/C.23-20 Tomichite (V,Fe)4Ti3AsO13(OH) A2/m 2/m

IV/C.23-30 Derbylite (Fe,Fe,Ti)7SbO13(OH) P 2₁/m 2/m

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Hemloite

(As,Sb)2(Ti,V,Fe,Al)12O23OH
Dana No: 46.2.4.1 Strunz No: IV/C.23-10
Locality:

Notes: