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Hemloite

Formula:
(As,Sb)
 
2
(Ti,V,Fe,Al)
 
12
O
 
23
(OH)
System:TriclinicHardness:6½
Name:Names for the Hemlo gold deposit, Hemlo, Ontario, Canada


subhedral to anhedral grains up to 400 x 600 microns in size

Classification of Hemloite

IMA status:Approved
Strunz 8th edition ID:4/C.23-10
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:46.2.4.1

46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
2 : Miscellaneous
Hey's CIM Ref.:24.3.3

24 : Antimonates and Antimonites
3 : Antimonates of Ti and Pb
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Type Occurrence of Hemloite

Type Locality:Hemlo Mines, Hemlo gold deposit, Marathon, Thunder Bay District, Ontario, Canada
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.

Physical Properties of Hemloite

Hardness (Mohs):6½

Crystallography of Hemloite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 7.552Å, b = 15.842Å, c = 7.158Å
α = 78.36°, β = 84.97°, γ = 86.78°
Ratio:a:b:c = 0.477 : 1 : 0.452
Unit Cell Volume:V 834.88 ų (Calculated from Unit Cell)

Chemical Properties of Hemloite

Formula:
(As,Sb)
 
2
(Ti,V,Fe,Al)
 
12
O
 
23
(OH)
Essential elements:As, H, O, Ti
All elements listed in formula:Al, As, Fe, H, O, Sb, Ti, V
Common Impurities:Al

Relationship of Hemloite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JB.05Fetiasite
(Fe
3+
 
,Fe
2+
 
,Ti)
 
3
[O
 
2
|As
 
2
O
 
5
]
4.JB.10Manganarsite
Mn
 
3
[(OH)
 
4
|As
 
2
O
 
4
]
4.JB.15Magnussonite
Mn
 
10
As
 
6
O
 
18
(OH,Cl)
 
2
4.JB.15UM1984-09-AsO:ClHMn
Mn
 
10
As
 
6
O
 
18
(OH)Cl
4.JB.20Armangite
Mn
2+
26
[CO
 
3
|(HAsO
 
3
)
 
4
|(AsO
 
3
)
 
14
]
4.JB.25Nanlingite
NaCa
 
6
(Mg,Fe,Li)
 
12
(AsO
 
3
)
 
2
[Fe(AsO
 
3
)
 
6
]F
 
14
·
4.JB.30Asbecasite
Ca
 
3
(Ti,Sn
4+
 
)Be
 
2
[(AsO
 
3
)
 
3
|SiO
 
4
]
 
2
4.JB.35Stenhuggarite
CaFeSbO(AsO
 
3
)
 
2
4.JB.40Trigonite
Pb
 
3
Mn
2+
 
[HAsO
 
3
|(AsO
 
3
)
 
2
]
4.JB.45Finnemanite
Pb
 
5
[Cl|(AsO
 
3
)
 
3
]
4.JB.50Gebhardite
Pb
 
8
[O|Cl
 
6
|(As
 
2
O
 
5
)
 
2
]
4.JB.55Derbylite
(Fe,Fe,Ti)
 
7
SbO
 
13
(OH)
4.JB.55Tomichite
(V,Fe)
 
4
Ti
 
3
AsO
 
13
OH
4.JB.55Graeserite
(Fe
3+
 
,Ti)
 
4
Ti
 
3
AsO
 
13
(OH)
4.JB.65Freedite
Pb
 
15
(Cu,Fe
2+
 
)
 
3
[O
 
7
|Cl
 
10
|(AsO
 
3
)
 
4
]
4.JB.70Georgiadèsite
Pb
 
16
[(OH)
 
6
|Cl
 
14
|(AsO
 
4
)
 
4
]
4.JB.75Ekatite
(Fe
3+
 
,Fe
2+
 
,Zn)
 
12
(OH)
 
6
(AsO
 
3
)
 
6
[AsO
 
3
,HOSiO
 
3
]
 
2
Related Minerals - Hey's Index Grouping:

- +
24.3.1Lewisite
(Ca,Fe,Na)
 
2
(Sb,Ti)
 
2
(O,OH)
 
7
24.3.2Derbylite
(Fe,Fe,Ti)
 
7
SbO
 
13
(OH)
24.3.4Nadorite
PbSb[O
 
2
|Cl]
24.3.5Bindheimite
Pb
 
2
Sb
 
2
O
 
6
(O,OH)
24.3.6Monimolite
(Pb,Ca,Fe)
 
3
Sb
 
2
O
 
7
24.3.7Thorikosite
Pb
 
3
[OH|(SbO
 
3
,AsO
 
3
)|Cl
 
2
]

Other Names for Hemloite

Synonyms:
IMA1987-015
Other Languages:
German:Hemloit
Russian:Эмлоит
Spanish:Hemloita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Hemloite

Reference List:Canadian Mineralogist: 27: 427-440.

Internet Links for Hemloite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Hemloite in the Natural History Museum (London) online catalogue
  • Hemloite details from Handbook of Mineralogy (PDF)
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    Localities for Hemloite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Ontario
      • Thunder Bay District
        • Marathon
          • Hemlo gold deposit
    		[Clark, 1993, "Hey's Mineral Index"]
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 14th Nov 2009 04:46:39