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Fehrite

A valid IMA mineral species
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05189200017759991814238.jpg
Fehrite

Mina Casualidad, Baños de Alhamilla, Pechina, Almería, Andalusia, Spain
05547650017671044616239.jpg
Fehrite

Les Ferreres mine, Rocabruna, Camprodon, Girona, Catalonia, Spain
03027550017272730829663.jpg
Fehrite, etc.

Les Ferreres mine, Rocabruna, Camprodon, Girona, Catalonia, Spain
09946720017864965145861.jpg
Fehrite

Mina Casualidad, Baños de Alhamilla, Pechina, Almería, Andalusia, Spain
09908440017639921063356.jpg
Fehrite

Les Ferreres mine, Rocabruna, Camprodon, Girona, Catalonia, Spain
04576990017272012713315.jpg
Fehrite, etc.

Les Ferreres mine, Rocabruna, Camprodon, Girona, Catalonia, Spain
05189200017759991814238.jpg
Fehrite

Mina Casualidad, Baños de Alhamilla, Pechina, Almería, Andalusia, Spain
05547650017671044616239.jpg
Fehrite

Les Ferreres mine, Rocabruna, Camprodon, Girona, Catalonia, Spain
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About FehriteHide

05991050017272473272969.jpg
Prof. Dr. Karl Thomas Fehr
Formula:
MgCu4(SO4)2(OH)6 · 6H2O
Colour:
Turquoise
Lustre:
Vitreous
Specific Gravity:
2.73 (Calculated)
Crystal System:
Monoclinic
Member of:
Ktenasite Group
Name:
Named in honour of Karl Thomas Fehr (14 January 1954, Blaichach in Oberallgäu, Germany - 18 March 2014, Munich, Germany), Professor of Mineralogy at the Department of Geo- and Environmental Sciences at the Ludwig-Maximilians-University Munich, Germany.
Isostructural with:
Ktenasite
The Mg analogue of ktenasite (isotypic with it) and gobelinite. The only currently known purely Mg-Cu sulfate mineral.


Unique IdentifiersHide

Mindat ID:
54043
Long-form identifier:
mindat:1:1:54043:4

Similar NamesHide

IMA Classification of FehriteHide

Classification of FehriteHide

Strunz-mindat (2026):
7.DD.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra

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

Physical Properties of FehriteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Turquoise
Streak:
Pale blue-green
Tenacity:
Brittle
Cleavage:
Perfect
on {001}
Fracture:
Irregular/Uneven
Density:
2.73 g/cm3 (Calculated)

Chemistry of FehriteHide

Mindat Formula:
MgCu4(SO4)2(OH)6 · 6H2O
Element Weights:
Element% weight
O47.005 %
Cu37.339 %
S9.421 %
Mg3.570 %
H2.665 %

Calculated from ideal end-member formula.
Elements listed:
Cu, H, Mg, O, S - search for minerals with similar chemistry

Crystallography of FehriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 5.6062(8) Å, b = 6.129(1) Å, c = 23.834(3) Å
β = 95.29(1)°
Ratio:
a:b:c = 0.915 : 1 : 3.889
Unit Cell V:
815.5 ų
Z:
2

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47b : [Sulfates and sulfites]

Type Occurrence of FehriteHide

Type Locality:
ⓘ Mina Casualidad, Baños de Alhamilla, Pechina, Almería, Andalusia, Spain
General Appearance of Type Material:
Thin lath-like crystals, up to 200 μm in length, forming radial aggregates.
Place of Conservation of Type Material:
Collections of (1) the Mineralogical Museum, Centrum für Naturkunde, University Hamburg, Grindelallee 48, 20146 Hamburg, Germany, catalogue No. MM1544 (holotype), and (2) the Mineralogische Staatssammlung München, Theresienstrasse 41, 80333 München, Germany, catalogue No. MSM36473 (cotype).
Geological Setting of Type Material:
Oxidation product of primary ore.
Associated Minerals at Type Locality:
ClinoatacamiteConnelliteGordaiteGypsumKapellasite
Serpierite
Reference:
Schlüter, Jochen, Malcherek, Thomas, Mihailova, Boriana, Rewitzer, Christian, Hochleitner, Rupert, Müller, Dirk, Günther, Amanda (2021) Fehrite, MgCu4(SO4)2(OH)6 · 6H2O, the magnesium analogue of ktenasite from the Casualidad mine near Baños de Alhamilla, Almeria, Spain. Neues Jahrbuch für Mineralogie - Abhandlungen, 197 (1). 1-10 doi:10.1127/njma/2020/0218

Other Language Names for FehriteHide

Dutch:Fehriet
German:Fehrit
Spanish:Fehrita

Relationship of Fehrite to other SpeciesHide

Member of:
Ktenasite Group
Other Members of Ktenasite Group:
AsagiiteNiCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/b
GobeliniteCoCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/m
KtenasiteZnCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/b
'Unnamed (Zn-analogue of Ktenasite)'Zn(Zn,Cu)4(SO4)2(OH)6 · 6H2O

Common AssociatesHide

Associations Based on Photo Data:
6 photos of Fehrite associated with DevillineCaCu4(SO4)2(OH)6 · 3H2O
2 photos of Fehrite associated with GypsumCaSO4 · 2H2O
1 photo of Fehrite associated with SerpieriteCa(Cu2+,Zn2+)4(S6+O4)2(OH)6 · 3H2O
1 photo of Fehrite associated with BrochantiteCu4(SO4)(OH)6

Related Minerals - Strunz-mindat GroupingHide

7.DD.AsagiiteNiCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/b
7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2OMon. 2 : P21
7.DD.07LlantenesiteCu6Al[SeO4](OH)12Cl · 3H2OTrig. 3m : P31c
7.DD.10LangiteCu4(SO4)(OH)6 · 2H2OMon. m
7.DD.10PosnjakiteCu4(SO4)(OH)6 · H2OMon. m : Pm
7.DD.10WroewolfeiteCu4(SO4)(OH)6 · 2H2OMon. m : Pm
7.DD.10GobeliniteCoCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/m
7.DD.15KobyasheviteCu5(SO4)2(OH)6 · 4H2OTric. 1 : P1
7.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2OTrig. 3m : P31c
7.DD.15'Unnamed (Dimorph of Devilline)'CaCu4(SO4)2(OH)6 · 3H2OMon. 2/m : P21/b
7.DD.20KtenasiteZnCu4(SO4)2(OH)6 · 6H2OMon. 2/m : P21/b
7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2OTric. 1 : P1
7.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6 · 4H2O Mon. 2/m : P21/b
7.DD.30NiedermayriteCdCu4(SO4)2(OH)6 · 4H2OMon. 2/m : P21/m
7.DD.30SerpieriteCa(Cu2+,Zn2+)4(S6+O4)2(OH)6 · 3H2OMon. 2/m : B2/b
7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2OMon. 2 : B2
7.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2OOrth. mm2 : Pca21
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2OMon. 2/m : P21/b
7.DD.35ShigaiteMn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
7.DD.35Zincaluminite(Zn1-xAlx)(SO4)x/2(OH)2 · nH2O
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2OTrig.
7.DD.35NatroglaucoceriniteZn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OHex.
7.DD.35Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2OTrig. 3m(32/m) : R3m
7.DD.35Honessite(Ni1-xFe3+x)(OH)2[SO4]x/2 · nH2OTrig.
7.DD.35Carrboydite(Ni1-xAlx)(SO4)x/2(OH)2 · nH2OHex.
7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2OHex.
7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig. 3m(32/m) : P3c1
7.DD.35NikischeriteFe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2OTrig. 3 : R3
7.DD.35Hydrohonessite(Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2OHex.
7.DD.35WoodwarditeCu1-xAlx(OH)2(SO4)x/2 · nH2OTrig. 3m(32/m) : R3m
7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2OTrig. 3m(32/m) : R3m
7.DD.35Mountkeithite[(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2OHex.
7.DD.40Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2OMon. 2/m : P21/b
7.DD.40Torreyite(Mg,Mn2+)7◻2Mn2+2Zn4(SO4)2(OH)22 · 8H2OMon. 2/m : P21/b
7.DD.40IsseliteCu6(SO4)(OH)10(H2O)4 · H2OOrth. mm2 : Pmn21
7.DD.45MooreiteMg9◻2Mn2Zn4(SO4)2(OH)26 · 8H2OMon. 2/m : P2/b
7.DD.45Hodgesmithite(Cu,Zn)6Zn(SO4)2(OH)10 · 3H2OTrig. 3 : P3
7.DD.47LahnsteiniteZn4(SO4)(OH)6 · 3H2OTric. 1 : P1
7.DD.50NamuwiteZn4(SO4)(OH)6 · 4H2OTrig. 3 : P3
7.DD.50Minohlite(Cu,Zn)7(SO4)2(OH)10 · 8H2OHex.
7.DD.52LauraniiteCu6Cd2(SO4)2(OH)12 · 5H2OMon. 2/m : P21/b
7.DD.55BechereriteZn7Cu(OH)13[(SiO(OH)3(SO4)]Trig. 3 : P3
7.DD.60Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2OMon. 2/m
7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2OMon. 2/m : P21/b
7.DD.70RedgilliteCu6(SO4)(OH)10 · H2OMon. 2/m : P21/b
7.DD.75NickelalumiteNiAl4(SO4)(OH)12(H2O)3Mon. 2/m
7.DD.75KyrgyzstaniteZnAl4(SO4)(OH)12 · 3H2OMon. 2/m : P21/b
7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2OMon. 2 : P21
7.DD.80Schulenbergite(Cu,Zn)7(SO4)2(OH)10 · 3H2OTrig. 3
7.DD.80'UM1992-30-SO:CCuHZn'(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2OTrig. 3 : P3
7.DD.80ThérèsemagnaniteNaCo4(SO4)(OH)6Cl · 6H2OTrig. 3 : P3
7.DD.80GuarinoiteZn6(SO4)(OH)10 · 5H2OHex.
7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2OOrth. mm2 : Cmc21

Fluorescence of FehriteHide

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 FehriteHide

References for FehriteHide

Localities for FehriteHide

Showing 3 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.
Germany
 
  • Saxony-Anhalt
    • Mansfeld-Südharz
      • Mansfeld
Gerhard Möhn collection
Spain (TL)
 
  • Andalusia
    • Almería
      • Pechina
        • Baños de Alhamilla
Miyawaki et al. (2020) +2 other references
  • Catalonia
    • Girona
      • Camprodon
        • Rocabruna
Garrido Rufaste +6 other references
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