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Semseyite

A valid IMA mineral species - grandfathered
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Pb9Sb8S21
Colour:
Steel-grey to black
Lustre:
Metallic
Hardness:
2½
Specific Gravity:
6.08
Crystal System:
Monoclinic
Member of:
Plagionite Group
Name:
For Andor von Semsey (22 December 1833, Kassa, Hungary - 14 August 1923, Budapest, Hungary), a Nobleman and amateur mineralogist. The mineralandorite is also named after him.
Type Locality:
ⓘBaia Sprie mine, Baia Sprie, Maramureș County, Romania
Semseyite belongs to a homologous series of lead antimony sulphides. The structure contains sheets of galena, the thickness of this sheet determines the position in the homologous series. Semseyite has the thickest sheet andfülöppite the thinnest.

Stoichiometrically similar toheteromorphite.


Unique Identifiers
First published:
1881
Type description reference:
Krenner, J. (1881) Semseyite. Magyar Tudományos Akadémia Értesítője: 15: 111-118.

Classification of Semseyite

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
Dana 8th ed.:
3.6.20.4

3 : SULFOSALTS
6 : 2 < ø < 2.49
Hey's CIM Ref.:
5.6.13

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
6 : Sulpharsenites etc. of Pb alone

Mineral Symbols
Transparency:
Opaque
Colour:
Steel-grey to black
Streak:
Black
Hardness:
2½ onMohs scale
Tenacity:
Brittle
Cleavage:
Perfect
perfect on {112}, ( {001} of the galena plane)
Density:
6.08 g/cm3 (Measured)    6.15 g/cm3 (Calculated)

Optical Data of Semseyite
Common Impurities:
Ag,Cu,Fe

Crystallography of Semseyite
Reference:
Krenner, J. (1881) Semseyite. Magyar Tudományos Akadémia Értesítője: 15: 111-118.

Other Language Names for Semseyite

Relationship of Semseyite to other Species
Other Members of Plagionite Group:
FülöppitePb3Sb8S15Mon. 2/m :B2/b
HeteromorphitePb7Sb8S19Mon. 2/m :B2/b
PlagionitePb5Sb8S17Mon. 2/m :B2/b

Common AssociatesTric.1 :P12.HC.HuntingdonitePb19Sb16As6S51Cl2Tric.1 :P12.HC.MoiraitePb12Sb8As8S36Tric.1 :P12.HC.05fParapierrotiteTlSb5S8Mon.m2.HC.05gMarumoitePb32As40S92Mon. 2 :P212.HC.05bBaumhauerite II2.HC.05dRathiteAg2Pb12-xTlx/2As18+x/2S40Mon. 2/m :P21/b2.HC.05eHeptasartoriteTl7Pb22As55S108Mon. 2/m :P21/b2.HC.05dDufrénoysitePb2As2S5Mon. 2 :P212.HC.05eHendekasartoriteTl2Pb48As82S172Mon. 2/m :P21/b2.HC.05bArgentobaumhaueriteAg1.5Pb22As33.5S72Tric.1 :P12.HC.05cArgentoliveingiteAg3+xPb36-2xAs51+xS112Tric.1 :P12.HC.05bBaumhaueritePb12As16S36Tric.1 :P12.HC.05dVeenitePb16Sb9-xAs7+xS40, x ~ 0-0.5Mon. 2 :P212.HC.05eDekatriasartoriteTlPb58As97S204Mon. 2/m :P21/b2.HC.05aHyršlitePb8As10Sb6S32Mon. 2 :P212.HC.05eIncomsartoriteTl6Pb144As246S516Mon. 2/m2.HC.05cLiveingitePb9As13S28Mon. 2 :P212.HC.05cJohnjamboritePb14Sb8.5As7.5S38Tric.1 :P12.HC.05fPierrotiteTl2(Sb,As)10S16Orth.mm2 :Pna212.HC.05dRathite-IVPbAs2S42.HC.05dArgentodufrénoysiteAg3Pb26As35S80Tric.1 :P12.HC.05eÉcrinsiteAgTl3Pb4As11Sb9S36Tric. 1 :P12.HC.05aSartoritePbAs2S4Mon. 2/m :P21/m2.HC.05aTwinnite Pb0.8Tl0.1Sb1.3As0.8S4Mon. 2/m2.HC.05fPhilrothiteTlAs3S5Mon. 2/m :P21/b2.HC.05hPolloneiteAgPb46As26Sb23S120Mon. 2 :P212.HC.05aGuettarditePb8(Sb0.56As0.44)16S32Mon. 2/m :P21/b2.HC.10aFülöppitePb3Sb8S15Mon. 2/m :B2/b2.HC.10dRayitePb8(Ag,Tl)2Sb8S21Mon.2.HC.10cHeteromorphitePb7Sb8S19Mon. 2/m :B2/b2.HC.10bPlagionitePb5Sb8S17Mon. 2/m :B2/b2.HC.15FalkmanitePb3Sb2S6Mon.2.HC.15BoulangeritePb5Sb4S11Mon. 2/m :P21/b2.HC.20RobinsonitePb4Sb6S13Mon. 2/m :P21/m2.HC.25MoëloitePb6Sb6S14(S3)Orth. 222 :P212122.HC.30DadsonitePb23Sb25S60ClTric.1 :P12.HC.35ZoubekiteAgPb4Sb4S10Orth.2.HC.35Proto-owyheeiteAg9Pb40Sb45S112Mon. 2/m :P21/b2.HC.35OwyheeiteAg3Pb10Sb11S28Mon. 2/m2.HC.40ParasterryiteAg4Pb20Sb14As10S58Mon. 2/m :P21/b2.HC.50LopatkaitePb5Sb3AsS11Mon. 2/m :P21/b

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    • References for SemseyiteⓘCapillitas mining districtPutz et al. (2009)Brodtkorb (2002)+1 other referenceCoira et al. (1995)+1 other referenceCoira et al. (1995)+1 other referenceBrodtkorb (2002)Brodtkorb (2002)
    Armenia
     
    Kukulyan (1982)+2 other references
    Australia
     
    Sung (2008)
    Austria
     
    G.Blaß50+2 other references
    Bolivia
     
    Wilson (2001)Wilson (2001)Wilson (2001)+1 other referenceTorres et al. (2019)Salomon Rivas y Federico Ahlfeld (1998)Kempff et al. (La Paz, 2009)Salomon Rivas y Federico Ahlfeld (1998)Salomon Rivas y Federico Ahlfeld (1998)Cazorla Martínez et al. (2019)Torró et al. (2019)Kempff et al. (La Paz, 2009)USGS Bulletin # 1975Salomon Rivas y Federico Ahlfeld (1998)Geology and Mineral Resources of the Altiplano and Cordillera Occidental (USGS Bulletin no. 1975)Torró et al. (2019)
    Bosnia and Herzegovina
     
    Radosavljević et al. (2016)
    Bulgaria
     
    Breskovska et al. (1982)
    Canada
     
    Woodside et al. (2000)Coleman (1953)Coleman (1953)unpublished BSc. thesis+2 other referencesJambor (1967)+1 other reference
    China
     
    Cao et al. (2025)Jensen (2009)+1 other referenceLi et al. (2019)Yan Liu et al. (2011)
    Czech Republic
     
    ŽáčekPažout et al. (2017)Pažout et al. (2017)Škácha et al. (2012)Dolníček et al. (2023)Sejkora et al. (2008)Škácha et al. (2021)C.Auer (2016)Wiesner I.: Nálezy některých ...
    France
     
    R. PierrotPérichaud (1968)Périchaud (1968)Périchaud (1968)Pélisson (1989)Périchaud (1968)J.-J. Périchaud: "Les Minéraux ...J.-J. Périchaud: Les Minéraux d'Auvergne et al. (1986)Pélisson (1989)Pélisson (1989)Pélisson (1989)Pélisson (1989)Alain Tuel collectionPérichaud (1968)Marcoux et al. (1988)Ducluzaux B. (2021)Chauris (2014)Pierrot et al. (1973)Pierrot et al. (1973)Chauris (2014)Y. MoëloY. FouquetY. MoëloWittern+1 other referenceThis mine worked the same vein as Gabe ...+2 other referencesHohl (1994)Michel Treillard collectionBrousse (1982)Y. MoëloInventaire Mineralogique de la France ...Picot et al. (1982)Bernadi (2004)Fourcault (1993)Fourcault (1993)+1 other referenceMoëlo et al. (1975)+1 other referenceR. PierrotMari G. (1996)
    Germany
     
    Walenta (1992)Walenta (1989)+1 other referenceField collected by Gunther Grundmann ...50. (in German)+1 other referenceundefined+2 other referencesWeiß (1990)Weiß (1990)Meier (1995)Eigenfund auf der Halde der Grube ...+2 other referencesWagner et al. (2000)Schnorrer-Köhler (1989)Wagner et al. (2000)Wagner et al. (2000)Schnorrer-Köhler (1991)Schnorrer (1995)+1 other referenceWagner et al. (2000)Wittern (2001)Wagner et al. (2000)Wittern (2001)Wagner et al. (2000)Wagner et al. (2000)Wagner et al. (2000)Wagner et al. (2000)Wagner et al. (2000)Wagner et al. (2000)Wagner et al. (2000)Wagner et al. (2000)Wagner et al. (2000)Wagner et al. (2000)Wittern (2001)Gröbner et al. (2011)Gröbner et al. (2011)Wittern (2001)43-47+3 other references
    Greece
     
    Voudouris et al. (2008)Voudouris et al. (2018)Uwe Kolitsch & Branko Rieck (unpubl. SEM-EDS results)Voudouris et al. (2008)Kanellopoulos et al. (2024)Michael (2004)
    Hungary
     
    Koch (1985)Szakáll et al. (1996)Szakáll et al. (2012)
    India
     
    Mishra et al. (2009)
    Iran
     
    Daliran (2008)Asadi+3 other references
    Ireland
     
    Italy
     
    Piccoli et al. (2007)Brizzi G. et al. (GR)Giuliano bettini collectionOrlandi et al. (1996)+1 other referenceOrlandi et al. (1994)+1 other referenceOrlandi et al. (1994)Morino et al. (2016)Orlandi et al. (1994)+2 other referencesOrlandi et al. (2009)Orlandi et al. (2000)+1 other referenceHollis et al. (2021)
    Japan
     
    ISHIYAMA et al. (1990)AKATSUKA (1961)Fujiwara (1994)Harada et al. (1970)
    Kazakhstan
     
    Spiridonov (2014)
    Kosovo
     
    Kluza et al. (2024)Mederski et al. (2021)+1 other referenceMederski et al. (2019)
    Mexico
     
    Rubinovich-Kogan et al. (1988)+1 other reference
    New Zealand
     
    Grapes et al. (1999)Grapes et al. (1999)
    Peru
     
    Gibson (1992)Crowley et al. (1997)B. DuvalLewis (1964)Lewis (1964)Lewis (1964)Lewis (1964)
    Poland
     
    Kozłowski et al. (2024)Kozłowski et al. (2024)
    Portugal
     
    Alves (n.d.)Alves (n.d.)+1 other reference
    Romania
     
    Ciobanu et al. (2004)Bailly et al. (1998)Damian+8 other referencesPalache et al. (1944)Buzatu et al. (2015)Damian+8 other referencesMarias FranciscKOVÁCS et al. (2020)Clain et al. (2006)Macaleţ et al. (1994)+1 other reference
    Russia
     
    Pavlova et al. (2009)Borisenko et al. (1999)Kalinin+3 other referencesPavlova et al. (2009)Pavlova et al. (2009)Kasatkin et al. (2020)+1 other referenceHyršl (1992)Eremin et al. (2023)Spiridonov et al. (2010, December)+1 other reference
    Serbia
     
    Pačevski et al. (2018)
    Slovakia
     
    Koděra (1986)Maťo et al. (stredné Slovensko)Martin Števko-unpublishedDuda et. all.specialities of chemical composition. ...+1 other referenceChovan et al. (1998)Topa et al. (2012)
    Spain
     
    Valladares et al. (2021)Georges FAVREAU collection & EDX ...Rewitzer et al. (2019)Calvo (2003)Calvo (2003)mineralespania.blogspot.fr (n.d.)
    Switzerland
     
    EDS analysis (EDXPR_2298)Meisser N. et al. (2020)
    Tajikistan
     
    Pavlova et al. (2009)Evseev et al. (2004)
    UK
     
    Golley et al. (1995)Fortey et al. (1984)+1 other referenceStanley et al. (1991)www.english-nature.org.uk (2016)Williams (1973)+1 other referenceR. E. Bevins (1988)+2 other references
    Ukraine
     
    [World of Stones 12:20]
    USA
     
    Howard (2007)Eckel et al. (1997)Eckel et al. (1997)Eckel et al. (1997)Eckel et al. (1997)Eckel et al. (1997)Eckel et al. (1997)- (2005)Laszlo Dudas dealer stock (Continental Minerals)Smith et al. (2000)
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