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Agmantinite

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Formula:
Ag2MnSnS4
Colour:
Orange–red
Lustre:
Adamantine
Hardness:
2 - 2½
Specific Gravity:
4.574 (Calculated)
Crystal System:
Orthorhombic
Name:
The name is for the composition, containing silver (Ag), manganese, and tin.
Structurally related to wurtzite.


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Classification of AgmantiniteHide

Approved
Approval year:
2014
First published:
2019
2.CB.

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.

Physical Properties of AgmantiniteHide

Adamantine
Transparency:
Opaque
Colour:
Orange–red
Streak:
Red
Hardness:
2 - 2½ on Mohs scale
Comment:
On the basis of chemically similar compounds
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
None observed
Density:
4.574 g/cm3 (Calculated)
Comment:
Calculated from empirical formula

Optical Data of AgmantiniteHide

Anisotropism:
weak; reddish brown to greenish grey rotation tints
Bireflectance:
weak
Reflectivity:
400nmR1=19.0%R2= 19.7%
440nmR1=19.4%R2= 21.9%
470nmR1=19.7%R2= 22.0%
500nmR1=19.9%R2= 22.5%
546nmR1=20.5%R2= 23.2%
589nmR1=21.7%R2= 24.9%
620nmR1=21.4%R2= 24.3%
650nmR1=20.6%R2= 23.6%
700nmR1=19.6%R2= 22.5%
nmR1=%R2=%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 24.9%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Greyish white
Internal Reflections:
red
Pleochroism:
Not Visible

Chemical Properties of AgmantiniteHide

Formula:
Ag2MnSnS4

Crystallography of AgmantiniteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 6.632(2) Å, b = 6.922(2) Å, c = 8.156(2) Å
Ratio:
a:b:c = 0.958 : 1 : 1.178
Unit Cell V:
374.42 ų (Calculated from Unit Cell)
Z:
2
Comment:
P21nm

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.51 Å(s)
3.32 Å(w)
3.11 Å(vs)
2.42 Å(w)
2.04 Å(m)
1.88 Å(m)
1.73 Å(m)
Comments:
From Type Description.

Type Occurrence of AgmantiniteHide

General Appearance of Type Material:
crystals up to 100 μm across
Place of Conservation of Type Material:
Type material is deposited in the reference collection of the Naturhistorisches Museum Wien, Wien, Austria, specimen number N 9736.
Associated Minerals at Type Locality:
Reference:
Keutsch, F.N., Topa, D., Fredrickson, R.T., Makovicky, E., Paar, W.H. (2019) Agmantinite, Ag2MnSnS4, a new mineral with a wurtzite derivative structure from the Uchucchacua polymetallic deposit, Lima Department, Peru. Mineralogical Magazine: 83(2): 233-238.

Synonyms of AgmantiniteHide

Related Minerals - Nickel-Strunz GroupingHide

2.CB.05aColoradoiteHgTeIso. m3m (4/m 3 2/m)
2.CB.05aHawleyiteCdSIso. 4 3m : F4 3m
2.CB.05aMetacinnabarHgSIso. 4 3m : F4 3m
2.CB.05cPolhemusite(Zn,Hg)STet.
2.CB.05bSakuraiite(Cu,Zn,Fe)3(In,Sn)S4 Iso.
2.CB.05aSphaleriteZnSIso. 4 3m : F4 3m
2.CB.05aStilleiteZnSeIso. 4 3m : F4 3m
2.CB.05aTiemanniteHgSeIso. 4 3m : F4 3m
2.CB.05UM1998-15-S:CuFeZnCu2Fe3Zn5S10
2.CB.05aRudashevskyite(Fe,Zn)SIso. 4 3m : F4 3m
2.CB.10aChalcopyriteCuFeS2Tet. 4 2m : I4 2d
2.CB.10aEskeborniteCuFeSe2Tet.
2.CB.10aGalliteCuGaS2Tet. 4 2m : I4 2d
2.CB.10bHaycockiteCu4Fe5S8Orth. 2 2 2
2.CB.10aLenaiteAgFeS2Tet. 4 2m : I4 2d
2.CB.10bMooihoekiteCu9Fe9S16Tet.
2.CB.10bPutoraniteCu1.1Fe1.2S2Iso.
2.CB.10aRoquesiteCuInS2Tet. 4 2m : I4 2d
2.CB.10bTalnakhiteCu9(Fe,Ni)8S16Iso. 4 3m : I4 3m
2.CB.10aLaforêtiteAgInS2Tet. 4 2m : I4 2d
2.CB.15aČernýiteCu2(Cd,Zn,Fe)SnS4Tet. 4 2m : I4 2m
2.CB.15aFerrokësteriteCu2FeSnS4Tet. 4 : I4
2.CB.15aHocartiteAg2(Fe2+,Zn)SnS4Tet. 4 2m : I4 2m
2.CB.15aIdaiteCu5FeS6Hex.
2.CB.15aKësterite Cu2ZnSnS4Tet. 4 : I4
2.CB.15aKuramiteCu3SnS4Tet.
2.CB.15bMohiteCu2SnS3Mon.
2.CB.15aPirquitasiteAg2ZnSnS4Tet. 4 : I4
2.CB.15aStanniteCu2FeSnS4Tet. 4 2m : I4 2m
2.CB.15cStannoiditeCu+6Cu2+2(Fe2+,Zn)3Sn2S12Orth.
2.CB.15aVelikiteCu2HgSnS4Tet.
2.CB.15cUM2006-11-S:CuFeGeZnCu8(Fe,Zn)3Ge2S12 (?)
2.CB.20ChatkaliteCu6FeSn2S8Tet. 4 2m : P4m2
2.CB.20MawsoniteCu6Fe2SnS8Tet. 4 2m : P4m2
2.CB.30ColusiteCu13VAs3S16Iso. 4 3m : P4 3n
2.CB.30GermaniteCu13Fe2Ge2S16Iso. 4 3m : P4 3n
2.CB.30GermanocolusiteCu26V2(Ge,As)6S32Iso. 4 3m : P4 3m
2.CB.30NekrasoviteCu26V2(Sn,As,Sb)6S32Iso.
2.CB.30StibiocolusiteCu13V(Sb,Sn,As)3S16Iso. 4 3m : P4 3m
2.CB.30Ovamboite Cu20(Fe,Cu,Zn)6W2Ge6S32Iso.
2.CB.30MaikainiteCu20(Fe,Cu)6Mo2Ge6S32Iso. m3m (4/m 3 2/m)
2.CB.35aHemusiteCu6SnMoS8Iso.
2.CB.35aKiddcreekiteCu6SnWS8Iso. 4 3m : F4 3m
2.CB.35aPolkovicite(Fe,Pb)3(Ge,Fe)1-xS4Iso.
2.CB.35aRenierite(Cu1+,Zn)11Fe4(Ge4+,As5+)2S16Tet. 4 2m : P4 2c
2.CB.35aVincienniteCu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16Tet.
2.CB.35aMorozeviczite(Pb,Fe)3Ge1-xS4Iso.
2.CB.35bCatamarcaiteCu6GeWS8Hex. 6mm : P63mc
2.CB.40LautiteCuAsSOrth. mmm (2/m 2/m 2/m) : Pnma
2.CB.45CadmoseliteCdSeHex. 6mm : P63mc
2.CB.45GreenockiteCdSHex. 6mm : P63mc
2.CB.45Wurtzite(Zn,Fe)SHex. 6mm : P63mc
2.CB.45RambergiteMnSHex. 6mm : P63mc
2.CB.45Buseckite(Fe,Zn,Mn)SHex. 6mm : P63mc
2.CB.55aCubaniteCuFe2S3Orth. mmm (2/m 2/m 2/m)
2.CB.55bIsocubaniteCuFe2S3Iso. m3m (4/m 3 2/m) : Fm3m
2.CB.60PicotpauliteTlFe2S3Orth. mmm (2/m 2/m 2/m) : Cmcm
2.CB.60RaguiniteTlFeS2Orth.
2.CB.65ArgentopyriteAgFe2S3Mon. 2/m
2.CB.65SternbergiteAgFe2S3Orth. mmm (2/m 2/m 2/m)
2.CB.70SulvaniteCu3VS4Iso. 4 3m : P4 3m
2.CB.75VulcaniteCuTeOrth.
2.CB.80EmpressiteAgTeOrth. mmm (2/m 2/m 2/m)
2.CB.85MuthmanniteAuAgTe2Mon. 2/m : P2/m

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.

References for AgmantiniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Keutsch, F.N., Topa, D., Takagi Fredrickson, R., Makovicky, E. and Paar, W. (2015) Agmantinite, IMA 2014-083. CNMNC Newsletter No. 23, February 2015, page 57. Mineralogical Magazine: 79: 51-58.
Keutsch, F.N., Topa, D., Fredrickson, R.T., Makovicky, E., Paar, W.H. (2019) Agmantinite, Ag2MnSnS4, a new mineral with a wurtzite derivative structure from the Uchucchacua polymetallic deposit, Lima Department, Peru. Mineralogical Magazine: 83(2): 233-238.

Internet Links for AgmantiniteHide

Localities for AgmantiniteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Peru (TL)
 
  • Lima
    • Oyon Province
Keutsch, F.N., Topa, D., Fredrickson, R.T., Makovicky, E., Paar, W.H. (2019) Agmantinite, Ag2MnSnS4, a new mineral with a wurtzite derivative structure from the Uchucchacua polymetallic deposit, Lima Department, Peru. Mineralogical Magazine: 83(2): 233-238.
 
Mineral and/or Locality  
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