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Lopatkaite

A valid IMA mineral species
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01137570017272322699473.jpg
Lopatkaite

Barika ore deposit, Sardasht, Sardasht County, West Azerbaijan Province, Iran
01137570017272322699473.jpg
Lopatkaite

Barika ore deposit, Sardasht, Sardasht County, West Azerbaijan Province, Iran
01137570017272322699473.jpg
Lopatkaite

Barika ore deposit, Sardasht, Sardasht County, West Azerbaijan Province, Iran
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About LopatkaiteHide

Formula:
Pb5Sb3AsS11
Colour:
greyish black
Lustre:
Metallic
Hardness:
3 - 3½
Specific Gravity:
6.168 (Calculated)
Crystal System:
Monoclinic
Name:
The new mineral is named after Eduard Lopatka (born 1961), who provided to us his sample collection of Madoc material, in which we found the new mineral.
Homeotype of boulangerite.
Lopatkaite is also a new member of the rod-based family of sulfosalts.


Unique IdentifiersHide

Mindat ID:
43603
Long-form identifier:
mindat:1:1:43603:4

IMA Classification of LopatkaiteHide

Classification of LopatkaiteHide

Strunz-mindat (2026):
2.HC.50

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
LpkIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of LopatkaiteHide

Lustre:
Metallic
Transparency:
Opaque
Colour:
Greyish black
Streak:
Dark gray
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN50=189 - 208 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
none
Density:
6.168 g/cm3 (Calculated)

Optical Data of LopatkaiteHide

Anisotropism:
distinct - rotation tints in shades of grey
Bireflectance:
distinct and white to dark grey, especially in oil.
Reflectivity:
WavelengthR1 (%)R2 (%)
470nm37.0%39.3%
546nm34.1%36.9%
589nm33.1%36.2%
650nm31.3%34.1%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 39.3%.
R1 shown in black, R2 shown in red
Colour in reflected light:
greyish white
Internal Reflections:
none
Pleochroism:
Visible
Comments:
white to grey

Chemistry of LopatkaiteHide

Mindat Formula:
Pb5Sb3AsS11
Element Weights:
Element% weight
Pb56.646 %
Sb19.973 %
S19.286 %
As4.097 %

Calculated from ideal end-member formula.
Pb
Sb
S
As
Elements listed:
As, Pb, S, Sb - search for minerals with similar chemistry

Crystallography of LopatkaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/c
Setting:
P21/c
Cell Parameters:
a = 8.0806(6) Å, b = 23.3597(18) Å, c = 21.4880(16) Å
β = 100.7090(10)°
Ratio:
a:b:c = 0.346 : 1 : 0.92
Unit Cell V:
3,985.44 ų (Calculated from Unit Cell)
Z:
4
Twinning:
none

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.728 Å(42)
3.722 Å(38)
3.712 Å(100)
3.296 Å(36)
3.207 Å(36)
2.804 Å(42)
2.780 Å(46)
2.779 Å(40)
Locality:
Centre Hastings Municipality, Hastings County, Ontario, Canada
Reference:
Topa, Dan; Makovicky, Emil; Putz, Hubert; Zagler, Georg (2026) Lopatkaite, a new mineral from Taylor Pit, Madoc, Ontario, Canada. European Journal of Mineralogy, 38 (2). p.217-229. doi:10.5194/ejm-38-217-2026
Comments:
Powder X-ray diffraction data could not be collected due to a lack of suitable pure material and were instead calculated based on single-crystal structure determination results.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of LopatkaiteHide

Type Locality:
ⓘ Taylor Pit, Madoc, Centre Hastings Municipality, Hastings County, Ontario, Canada
General Appearance of Type Material:
forms grains which attain a size of up to 300 µm and grain aggregates reaching up to more than 500 µm across. Grains of lopatkaite are embedded in calcite and are subhedral to anhedral.
Place of Conservation of Type Material:
Natural History Museum Vienna, Austria, catalogue no. O 3954 (formerly in the Department of Materials Engineering and Physics, University of Salzburg, Salzburg, Austria, specimen number 15008).
Geological Setting of Type Material:
classical sulfosalt occurrence
Sulfosalts occur there in steeply dipping cipollino calcite–dolomite marbles near their contact with Precambrian granite. The bulk of sulfides is composed of dark-brown sphalerite, boulangerite, jamesonite, and fine-grained arsenopyrite and pyrite. A variety of rare sulfosalts (Jambor, 1967a, b) occur sparingly, intergrown with the just mentioned ones, and they are difficult to identify.
Associated Minerals at Type Locality:
BoulangeriteVeeniteSterryiteCalcite
Reference:
Topa, Dan; Makovicky, Emil; Putz, Hubert; Zagler, Georg (2026) Lopatkaite, a new mineral from Taylor Pit, Madoc, Ontario, Canada. European Journal of Mineralogy, 38 (2). p.217-229. doi:10.5194/ejm-38-217-2026

Synonyms of LopatkaiteHide

Other Language Names for LopatkaiteHide

German:Lopatkait

Related Minerals - Strunz-mindat GroupingHide

2.HC.BernarlottiitePb6(As5Sb3)S18Tric. 1 : P1
2.HC.HuntingdonitePb19Sb16As6S51Cl2Tric. 1 : P1
2.HC.MoiraitePb12Sb8As8S36Tric. 1 : P1
2.HC.05fParapierrotiteTlSb5S8Mon. m
2.HC.05gMarumoitePb32As40S92Mon. 2 : P21
2.HC.05bBaumhauerite II
2.HC.05dRathiteAg2Pb12-xTlx/2As18+x/2S40Mon. 2/m : P21/c
2.HC.05eHeptasartoriteTl7Pb22As55S108Mon. 2/m : P21/c
2.HC.05dDufrénoysitePb2As2S5Mon. 2 : P21
2.HC.05eHendekasartoriteTl2Pb48As82S172Mon. 2/m : P21/c
2.HC.05bArgentobaumhaueriteAg1.5Pb22As33.5S72Tric. 1 : P1
2.HC.05cArgentoliveingiteAg3+xPb36-2xAs51+xS112Tric. 1 : P1
2.HC.05bBaumhaueritePb12As16S36Tric. 1 : P1
2.HC.05dVeenitePb16Sb9-xAs7+xS40, x ~ 0-0.5Mon. 2 : P21
2.HC.05eDekatriasartoriteTlPb58As97S204Mon. 2/m : P21/c
2.HC.05aHyršlitePb8As10Sb6S32Mon. 2 : P21
2.HC.05eIncomsartoriteTl6Pb144As246S516Mon. 2/m : P21/c
2.HC.05cLiveingitePb20As24S56Mon. 2 : P21
2.HC.05cJohnjamboritePb14Sb8.5As7.5S38Tric. 1 : P1
2.HC.05fPierrotiteTl2(Sb,As)10S16Orth. mm2 : Pna21
2.HC.05dRathite-IVPbAs2S4
2.HC.05dArgentodufrénoysiteAg3Pb26As35S80Tric. 1 : P1
2.HC.05eÉcrinsiteAgTl3Pb4As11Sb9S36Tric. 1 : P1
2.HC.05aSartoritePbAs2S4Mon. 2/m : P21/m
2.HC.05aTwinnite Pb0.8Tl0.1Sb1.3As0.8S4Mon. 2/m
2.HC.05fPhilrothiteTlAs3S5Mon. 2/m : P21/c
2.HC.05hPolloneiteAgPb46As26Sb23S120Mon. 2 : P21
2.HC.05aGuettarditePb8(Sb0.56As0.44)16S32Mon. 2/m : P21/c
2.HC.10aFülöppitePb3Sb8S15Mon. 2/m : B2/b
2.HC.10dSemseyitePb9Sb8S21Mon. 2/m : B2/b
2.HC.10dRayitePb8(Ag,Tl)2Sb8S21Mon.
2.HC.10cHeteromorphitePb7Sb8S19Mon. 2/m : B2/b
2.HC.10bPlagionitePb5Sb8S17Mon. 2/m : B2/b
2.HC.15FalkmanitePb3Sb2S6Mon.
2.HC.15BoulangeritePb5Sb4S11Mon. 2/m : P21/c
2.HC.20RobinsonitePb4Sb6S13Mon. 2/m : P21/m
2.HC.25MoëloitePb6Sb6S14(S3)Orth. 222 : P21212
2.HC.30DadsonitePb23Sb25S60ClTric. 1 : P1
2.HC.35ZoubekiteAgPb4Sb4S10Orth.
2.HC.35Proto-owyheeiteAg9Pb40Sb45S112Mon. 2/m : P21/c
2.HC.35OwyheeiteAg3Pb10Sb11S28Mon. 2/m : P21/c
2.HC.40ParasterryiteAg4Pb20Sb14As10S58Mon. 2/m : P21/c

Other InformationHide

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 LopatkaiteHide

References for LopatkaiteHide

Localities for LopatkaiteHide

Showing 6 localities.

This 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.
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Locality ListHide

- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada (TL)
 
  • Ontario
    • Hastings County
      • Centre Hastings Municipality
        • Madoc
Williams et al. (2013)
France
 
  • Provence-Alpes-Côte d'Azur
    • Hautes-Alpes
      • Gap
        • La Chapelle-en-Valgaudemar
Georges FAVREAU collection + EDS +2 other references
Iran
 
  • West Azerbaijan Province
    • Sardasht County
      • Sardasht
www.excaliburmineral.com +2 other references
Romania
 
  • Hunedoara County
    • Certeju de Sus
Dincă et al. (2025)
Russia
 
  • Sverdlovsk Oblast
    • Serovsky District
      • Turya river
        • Tur'insk
Kasatkin et al. (2021) +1 other reference
USA
 
  • New York
    • St. Lawrence County
Topa et al. (2026)
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