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About KeutschiteHide

Dr. Frank Keutsch
Crystal System:
Member of:
Named for Dr. Frank Keutsch (b. 1971), professor of chemistry at Harvard University and specialist in sulphides and sulphosalts.
Can be considered a partially Ag-substituted luzonite.

Compare the chemically similar eckerite.

Classification of KeutschiteHide

Approval Year:

Physical Properties of KeutschiteHide


Chemical Properties of KeutschiteHide


Crystallography of KeutschiteHide

Crystal System:
Class (H-M):
4 2m - Scalenohedral
Space Group:
I4 2m
I4 2m
Cell Parameters:
a = 5.5834(15) Å, c = 10.021(3) Å
a:c = 1 : 1.795
Unit Cell V:
312.40 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
From Type Description.

Type Occurrence of KeutschiteHide

Place of Conservation of Type Material:
Type material is deposited in the reference collection of the Naturhistorisches Museum Wien, Wien, Austria, specimen number N9734

Synonyms of KeutschiteHide

Relationship of Keutschite to other SpeciesHide

Member of:
Other Members of this group:
ČernýiteCu2(Cd,Zn,Fe)SnS4Tet. 4 2m : I4 2m
FamatiniteCu3SbS4Tet. 4 2m : I4 2m
FerrokësteriteCu2(Fe,Zn)SnS4Tet. 4 : I4
HocartiteAg2(Fe2+,Zn)SnS4Tet. 4 2m : I4 2m
Kësterite Cu2ZnSnS4Tet. 4 : I4
LuzoniteCu3AsS4Tet. 4 2m : I4 2m
OmariniiteCu8Fe2ZnGe2S12Orth. 2 2 2 : I2 2 2
PirquitasiteAg2ZnSnS4Tet. 4 : I4
StanniteCu2FeSnS4Tet. 4 2m : I4 2m
Unnamed (Cu-Zn-In Sulphide)CuZn2InS4
ZincobriartiteCu2(Zn,Fe)(Ge,Ga)S4Tet. 4 2m : I4 2m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Manganoquadratite2 photos of Keutschite associated with Manganoquadratite on mindat.org.
Calcite2 photos of Keutschite associated with Calcite on mindat.org.
Alabandite2 photos of Keutschite associated with Alabandite on mindat.org.
Bournonite-Seligmannite Series1 photo of Keutschite associated with Bournonite-Seligmannite Series on mindat.org.
Tennantite-Tetrahedrite Series1 photo of Keutschite associated with Tennantite-Tetrahedrite Series on mindat.org.

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 KeutschiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Topa, D., Takagi Fredrickson, R. and Stanley, C. (2014) Keutschite, IMA 2014-038. CNMNC Newsletter No. 21, August 2014, page 804; Mineralogical Magazine, 78, 797-804.

Internet Links for KeutschiteHide

Localities for KeutschiteHide

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.
  • Baden-Württemberg
    • Freiburg
      • Ortenaukreis
        • Wolfach
          • Oberwolfach
            • Rankach valley
Kolitsch, U., Bayerl, R. and Topa, D. (2019): Neufunde aus der Grube Clara im mittleren Schwarzwald (V). Mineralien-Welt 30 (3), 12-27 (in German).
Peru (TL)
  • Lima
    • Oyon Province
Topa, D., Takagi Fredrickson, R. and Stanley, C. (2014) Keutschite, IMA 2014-038. CNMNC Newsletter No. 21, August 2014, page 804; Mineralogical Magazine, 78, 797
Mineral and/or Locality  
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