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Čechite

A valid IMA mineral species
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04283560017271921969554.jpg
Čechite, etc.

Maria Magdalena Mine, Ulldemolins, Priorat, Tarragona, Catalonia, Spain
09531450017271921985367.jpg
Čechite

Pošepný vein outcrop, Vrančice, Příbram District, Central Bohemian Region, Czech Republic
03833720017271922016703.jpg
Čechite

Pošepný vein outcrop, Vrančice, Příbram District, Central Bohemian Region, Czech Republic
04283560017271921969554.jpg
Čechite, etc.

Maria Magdalena Mine, Ulldemolins, Priorat, Tarragona, Catalonia, Spain
09531450017271921985367.jpg
Čechite

Pošepný vein outcrop, Vrančice, Příbram District, Central Bohemian Region, Czech Republic
03833720017271922016703.jpg
Čechite

Pošepný vein outcrop, Vrančice, Příbram District, Central Bohemian Region, Czech Republic
04283560017271921969554.jpg
Čechite, etc.

Maria Magdalena Mine, Ulldemolins, Priorat, Tarragona, Catalonia, Spain
09531450017271921985367.jpg
Čechite

Pošepný vein outcrop, Vrančice, Příbram District, Central Bohemian Region, Czech Republic
Hide all sections | Show all sections

About ČechiteHide

03907570017271922056771.jpg
František Čech
Formula:
PbFe2+(VO4)(OH)
Colour:
Black
Lustre:
Resinous, Sub-Metallic
Hardness:
4½ - 5
Specific Gravity:
5.88
Crystal System:
Orthorhombic
Name:
Named by Zdeněk Mrázek and Zdeněk Táborský in 1981 in honor of František Čech [August 17, 1929 Mèřín near Velké, Mezíříkí, Czech Republic - September 4, 1995], mineralogist, Charles University, Prague, Czech Republic.
Isostructural with:
Adelite-Descloizite Group
Adelite-Descloizite Group.
The Fe2+ analogue of pyrobelonite.


Unique IdentifiersHide

Mindat ID:
925
Long-form identifier:
mindat:1:1:925:6
GUID
(UUID V4):
68edac70-ba03-414f-b58f-a4a83f5c3b99

IMA Classification of ČechiteHide

IMA status:
Approved
First published:
1981

Classification of ČechiteHide

Strunz-mindat (2025):
8.BH.40

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
Dana 8th ed.:
41.5.2.4

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
Hey's CIM Ref.:
21.4.19

21 : Vanadates (and vanadates with arsenate or phosphate)
4 : Vanadates of U, Mn, Fe or Ni

Mineral SymbolsHide

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

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

Physical Properties of ČechiteHide

Lustre:
Resinous, Sub-Metallic
Transparency:
Opaque
Colour:
Black
Comment:
{110} and {010}.
Streak:
Black
Hardness:
4½ - 5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Conchoidal
Density:
5.88 g/cm3 (Measured)    5.94 g/cm3 (Calculated)

Optical Data of ČechiteHide

Type:
Biaxial
Anisotropism:
Visible to strong, light gray to dark gray with brownish tint.
Bireflectance:
Very weak to imperceptible.
Reflectivity:
WavelengthR1R2
460nm16.0%18.5%
540nm14.8%17.6%
580nm14.4%17.7%
660nm15.1%18.9%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 18.9%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray white with a yellow tint (Blue light); yellow brown (yellow light); internal reflections vary from white, pale yellow, or rose

Chemistry of ČechiteHide

Mindat Formula:
PbFe2+(VO4)(OH)
Elements listed:
Fe, H, O, Pb, V - search for minerals with similar chemistry

Crystallography of ČechiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 7.605(3) Å, b = 9.435(4) Å, c = 6.099(2) Å
Ratio:
a:b:c = 0.806 : 1 : 0.646
Unit Cell V:
437.62 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Rounded crystals; anhedral.
Twinning:
None reported.
Comment:
SG Pnam

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.119 Å(77)
4.249 Å(51)
3.345 Å(42)
3.228 Å(100)
2.908 Å(77)
2.663 Å(53)
2.625 Å(81)
Comments:
ICDD 35-530

Geological EnvironmentHide

Type Occurrence of ČechiteHide

Co-Type Localities:
ⓘ Alexander Mine, Vrančice, Příbram District, Central Bohemian Region, Czech Republic
ⓘ Pošepný vein outcrop, Vrančice, Příbram District, Central Bohemian Region, Czech Republic
General Appearance of Type Material:
Granular masses up to 3 cm. Rare crystals up to 3 mm long.
Place of Conservation of Type Material:
Charles University, Praha, Czech Republic, 20037 (holotype).
Geological Setting of Type Material:
Old mine dumps of a polymetallic ore deposit.
Associated Minerals at Type Locality:
CalciteHedyphaneHematite

Other Language Names for ČechiteHide

German:Čechit
Russian:Чехит
Spanish:Čechita

Relationship of Čechite to other SpeciesHide

Member of:
Adelite-Descloizite Group
Other Members of this group:
AdeliteCaMg(AsO4)(OH)Orth. 2 2 2 : P21 21 21
ArsendescloizitePbZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
AustiniteCaZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
CobaltaustiniteCaCo(AsO4)(OH)Orth. 2 2 2 : P21 21 21
ConichalciteCaCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
DescloizitePbZn(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
DuftitePbCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
Duftite-alphaPbCu(AsO4)(OH)
GottlobiteCaMg(VO4)(OH)Orth. 2 2 2 : P21 21 21
HermannroseiteCaCu(PO4)(OH)Orth. 2 2 2 : P21 21 21
MottramitePbCu(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
NickelaustiniteCaNi(AsO4)(OH)Orth. 2 2 2 : P21 21 21
PyrobelonitePbMn2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
TangeiteCaCu(VO4)(OH)Orth. 2 2 2 : P21 21 21
Unnamed (Pb-analogue of Nickelaustinite)PbNi(AsO4)(OH)
VuagnatiteCaAl(SiO4)(OH)Orth. 2 2 2 : P21 21 21

Common AssociatesHide

Associated Minerals Based on Photo Data:
30 photos of Čechite associated with FluoriteCaF2
9 photos of Čechite associated with ChervetitePb2(V2O7)
6 photos of Čechite associated with CalderónitePb2Fe3+(VO4)2(OH)
3 photos of Čechite associated with HematiteFe2O3
2 photos of Čechite associated with MottramitePbCu(VO4)(OH)
1 photo of Čechite associated with ApatiteCa5(PO4)3(Cl/F/OH)

Related Minerals - Strunz-mindat GroupingHide

8.BH.PeterchiniteZn3Zn2(OH)6As[O3(OH)3]Mon. 2/m : B2/m
8.BH.ReznitskyiteCaMg(VO4)FMon. 2/m : B2/b
8.BH.CuprozheshengitePb4CuZn2(AsO4)2(PO4)2(OH)2Tric. 1 : P1
8.BH.ZheshengitePb4ZnZn2(AsO4)2(PO4)2(OH)2Tric. 1 : P1
8.BH.CrimsonitePbFe3+2(PO4)2(OH)2Orth. mmm (2/m 2/m 2/m) : Cccm
8.BH.05ThadeuiteCa(Mg,Fe2+)3(PO4)2(OH,F)2Orth. 2 2 2 : C2 2 21
8.BH.10PanasqueiraiteCaMg(PO4)(OH)Mon.
8.BH.10IsokiteCaMg(PO4)FMon. 2/m : B2/b
8.BH.10LacroixiteNaAl(PO4)FMon. 2/m : B2/b
8.BH.10ArsenatrotitaniteNaTi(AsO4)OMon. 2/m : B2/b
8.BH.10MaxwelliteNaFe3+(AsO4)FMon. 2/m : P2/m
8.BH.10DurangiteNaAl(AsO4)FMon. 2/m : B2/b
8.BH.10KononoviteNaMg(SO4)FMon. 2/m : B2/b
8.BH.15DrugmanitePb2Fe3+(PO4)(PO3OH)(OH)2Mon. 2/m : P21/b
8.BH.20Nigelcookite PbFe2+2V3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20Plumbojohntomaite PbFe2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20CirroliteCa3Al2(PO4)3(OH)3 (?)
8.BH.20PenikisiteBa(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20PerloffiteBa(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20Bjarebyite Group
8.BH.20StrontioperloffiteSrMn2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20PlumboperloffitePbMn2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20JohntomaiteBaFe2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.20KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.25Bertossaite(Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4Orth. mmm (2/m 2/m 2/m)
8.BH.25NatropalermoiteNa2SrAl4(PO4)4(OH)4Orth. mmm (2/m 2/m 2/m)
8.BH.25Palermoite(Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4Orth. mmm (2/m 2/m 2/m)
8.BH.30SewarditeCaFe3+2(AsO4)2(OH)2Orth. mmm (2/m 2/m 2/m) : Cccm
8.BH.30CarminitePbFe3+2(AsO4)2(OH)2Orth. mmm (2/m 2/m 2/m) : Cccm
8.BH.35AdeliteCaMg(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35DuftitePbCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35CobaltaustiniteCaCo(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35NickelaustiniteCaNi(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35GabrielsonitePbFe3+(As3+O3)OOrth. mm2 : Pmc21
8.BH.35ConichalciteCaCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35ArsendescloizitePbZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35Duftite-alphaPbCu(AsO4)(OH)
8.BH.35GottlobiteCaMg(VO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35AustiniteCaZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35HermannroseiteCaCu(PO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35TangeiteCaCu(VO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.40Khorixasite(Bi0.67◻0.33)Cu(VO4)(OH)Mon. 2/m : P2/m
8.BH.40MottramitePbCu(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
8.BH.40DescloizitePbZn(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
8.BH.40PyrobelonitePbMn2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
8.BH.45BayldonitePbCu3(AsO4)2(OH)2Mon. 2/m : B2/b
8.BH.45VésigniéiteBaCu3(VO4)2(OH)2Mon. 2/m : B2/m
8.BH.50PaganoiteNiBi(AsO4)OTric. 1 : P1
8.BH.55JagoweriteBaAl2(PO4)2(OH)2Tric.
8.BH.55HarrisoniteCa(Fe2+,Mg)6(PO4)2(SiO4)2Trig. 3m (3 2/m) : R3m
8.BH.60AttakoliteCaMn2+Al4(SiO3OH)(PO4)3(OH)4Mon. 2/m : B2/m
8.BH.65LeningraditePbCu3(VO4)2ClOrth. mmm (2/m 2/m 2/m) : Ibam
8.BH.70KatiarsiteKTiO(AsO4)Orth. mm2 : Pna21
8.BH.70YurgensoniteK2SnTiO2(AsO4)2Orth. mm2 : Pna21
8.BH.75MelanarsiteK3Cu7Fe3+O4(AsO4)4Mon. 2/m : B2/b
8.BH.80EvseeviteNa2Mg(AsO4)FOrth. mmm (2/m 2/m 2/m) : Pbcn
8.BH.80MoraskoiteNa2Mg(PO4)FOrth. mmm (2/m 2/m 2/m) : Pbcn
8.BH.85PiccoliiteNaCaMn3+2(AsO4)2O(OH)Orth. mmm (2/m 2/m 2/m) : Pbcm

Fluorescence of ČechiteHide

In UV light:
Not fluorescent.

Other InformationHide

IR Spectrum:
The infra-red spectrum is very similar to those of descloizite and mottramite, giving absorption bands characteristic of the (VO4)-3 group and (OH)-1 group.
Notes:
Dissolves readily in HCl (1:1) or HNO3 (1:1).
Magnetic.
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 ČechiteHide

References for ČechiteHide

Localities for ČechiteHide

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 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.
Czech Republic (TL)
 
  • Central Bohemian Region
    • Příbram District
      • Vrančice
[Lapis 1995 +1 other reference
J.Hyrsl (1992)
France
 
  • Occitanie
    • Aveyron
      • Villefranche-de-Rouergue
        • Saint-Parthem
          • Port-d'Agrès
Queneau (n.d.)
Italy
 
  • Liguria
    • Savona Province
      • Magliolo
        • Isallo
Balestra C. (2004) +1 other reference
Spain
 
  • Catalonia
    • Tarragona
      • Priorat
        • Ulldemolins
Rosell et al. (2017)
USA
 
  • Nevada
    • Humboldt County
      • Iron Point Mining District
        • Valmy
Castor et al. (2004)
    • Lyon County
      • Churchill Mining District
Storm Sears collection
  • Utah
    • Box Elder County
      • Grouse Creek Mts (Grouse Creek Range)
        • Rosebud Mining District
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