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Čechite

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About ČechiteHide

00582870014947525967390.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:

Classification of ČechiteHide

Approved
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
41.5.2.4

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
21.4.19

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

Physical Properties of ČechiteHide

Resinous, Sub-Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Black
Hardness:
4½ - 5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
5.88 g/cm3 (Measured)    5.94 g/cm3 (Calculated)

Optical Data of ČechiteHide

Type:
Biaxial
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

Chemical Properties of ČechiteHide

Formula:
PbFe2+(VO4)(OH)

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

Type Occurrence of ČechiteHide

Other Language Names for ČechiteHide

German:Čechit
Russian:Чехит
Spanish:Čechita

Relationship of Čechite to other SpeciesHide

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)
GabrielsonitePbFe3+(As3+O3)OOrth. mm2 : Pmc21
GottlobiteCaMg(VO4,AsO4)(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
VuagnatiteCaAl(SiO4)(OH)Orth.

Common AssociatesHide

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

Related Minerals - Nickel-Strunz GroupingHide

8.BH.05ThadeuiteCa(Mg,Fe2+)3(PO4)2(OH,F)2Orth. 2 2 2 : C2 2 21
8.BH.10DurangiteNaAl(AsO4)FMon. 2/m : B2/b
8.BH.10IsokiteCaMg(PO4)FMon. 2/m : B2/b
8.BH.10LacroixiteNaAl(PO4)FMon. 2/m : B2/b
8.BH.10MaxwelliteNaFe3+(AsO4)FMon.
8.BH.10PanasqueiraiteCaMg(PO4)(OH,F)Mon.
8.BH.10TilasiteCaMg(AsO4)FMon. m : Bb
8.BH.15DrugmanitePb2(Fe3+,Al)(PO4)(PO3OH)(OH)2Mon. 2/m : P21/b
8.BH.20Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3Mon.
8.BH.20CirroliteCa3Al2(PO4)3(OH)3 (?)
8.BH.20KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3Mon.
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.20JohntomaiteBaFe2+2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m
8.BH.25Bertossaite(Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4Orth.
8.BH.25Palermoite(Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4Orth.
8.BH.30CarminitePbFe3+2(AsO4)2(OH)2Orth. mmm (2/m 2/m 2/m) : Cccm
8.BH.30SewarditeCaFe3+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.35ArsendescloizitePbZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35AustiniteCaZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35CobaltaustiniteCaCo(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35ConichalciteCaCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35DuftitePbCu(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35GabrielsonitePbFe3+(As3+O3)OOrth. mm2 : Pmc21
8.BH.35NickelaustiniteCaNi(AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35TangeiteCaCu(VO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35GottlobiteCaMg(VO4,AsO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.35HermannroseiteCaCu(PO4)(OH)Orth. 2 2 2 : P21 21 21
8.BH.40DescloizitePbZn(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
8.BH.40MottramitePbCu(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.60Attakolite(Ca,Sr)Mn(Al,Fe)4(HPO4,PO4)3(SiO4,PO4)(OH)4Mon. 2/m : B2/m
8.BH.65LeningraditePbCu3(VO4)2ClOrth. mmm (2/m 2/m 2/m) : Ibam

Related Minerals - Dana Grouping (8th Ed.)Hide

41.5.2.1DescloizitePbZn(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
41.5.2.2MottramitePbCu(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
41.5.2.3PyrobelonitePbMn2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
41.5.2.5Duftite-alphaPbCu(AsO4)(OH)

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

21.4.1UvaniteU6+2V5+6O21 · 15H2O (?)Orth.
21.4.2Vanuranylite(H3O)2(UO2)2(VO4)2 · 4H2O
21.4.3StrelkiniteNa2(UO2)2(VO4)2 · 6H2OOrth.
21.4.4CarnotiteK2(UO2)2(VO4)2 · 3H2OMon. 2/m : P21/b
21.4.5Margaritasite(Cs,K,H3O)2(UO2)2(VO4)2 · H2OMon. 2/m : P21/b
21.4.6SengieriteCu2(UO2)2(VO4)2 · 6H2OMon. 2/m : P21/b
21.4.7MetatyuyamuniteCa(UO2)2(VO4)2 · 3-5H2OOrth. mmm (2/m 2/m 2/m)
21.4.8TyuyamuniteCa(UO2)2(VO4)2 · 5-8H2OOrth. mmm (2/m 2/m 2/m) : Pnna
21.4.9RauviteCa(UO2)2(V10O28) · 16H2O
21.4.10FrancevilliteBa(UO2)2(VO4)2 · 5H2OOrth.
21.4.11MetavanuraliteAl(UO2)2(VO4)2(OH) · 8H2OTric.
21.4.12VanuraliteAl(UO2)2(V2O8)(OH) · 11H2OMon.
21.4.13CurienitePb(UO2)2(VO4)2 · 5H2OOrth.
21.4.14FritzscheiteMn(UO2)2(PO4,VO4)2 · 10H2O (?)Tet.
21.4.15Palenzonaite(NaCa2)Mn2+2(VO4)3Iso. m3m (4/m 3 2/m) : Ia3d
21.4.16Santafeite(Na,Ca,Sr)12(Mn2+,Fe3+,Al,Mg)8Mn4+8(VO4)16(OH,O)20 · 8H2OOrth. mmm (2/m 2/m 2/m)
21.4.17PyrobelonitePbMn2+(VO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
21.4.18BrackebuschitePb2Mn3+(VO4)2(OH)Mon. 2/m : P21/m
21.4.20HeyitePb5Fe2+2(VO4)2O4Mon.
21.4.21MounanaitePbFe3+2(VO4)2(OH,F)2Mon. 2/m : B2/m
21.4.22SchubneliteFe3+VO4 · H2OTric.
21.4.23FervaniteFe3+4V5+4O16 · 5H2OMon.
21.4.24KazakhstaniteFe3+5V4+3V5+12O39(OH)9 · 9H2OMon.
21.4.25Bokite(Al,Fe3+)1.3(V5+,V4+,Fe3+)8O20 · 7.4H2OMon.
21.4.26Rusakovite(Fe3+,Al)5(VO4,PO4)2(OH)9 · 3H2O
21.4.27KolovratiteNixZny(VO4)0.67(x+y) · nH2O

Fluorescence of ČechiteHide

Not fluorescent.

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 ČechiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mrázek, Z. & Táborský, Z. (1981): Neues Jahrb. Mineral., Mh., 1981, 520-528.
Pertlik, F. (1989): Neues Jahrb. Mineral., Mh., 1989, 34-40.
Effenberger, H. (2002): IMA 18th Meeting, Session A12, MM9.
American Mineralogist: 67: 1074.

Internet Links 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 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.
Czech Republic (TL)
 
  • Central Bohemian Region
    • Příbram District
      • Vrančice
[Neues Jahrb.(1981) 520-528; Lapis 1995, 12, p.13-24]
J.Hyrsl (1992)
Italy
 
  • Liguria
    • Savona Province
      • Magliolo
        • Isallo
Balestra C., Armellino G. (2004): I minerali del giacimento di Isallo. Notiziario di Mineralogia e Paleontologia Ferrania Club, 18, 17-21; Balestra C. (2005): Tutto (o quasi) il vanadio della Liguria. Prie, 1 (maggio-agosto 2005), 60-74.
Spain
 
  • Catalonia
    • Tarragona
      • Priorat
        • Ulldemolins
- Rosell, J., Rubio, C., Varela, F. (2017): Els Minerals de Vanadi de la mina Maria Magdalena. Ulldemolins, el Priorat, Tarragona, Catalunya. Mineralogistes de Catalunya, 1/2017 (in catalan). And on: Paragénesis, /2017 (magazine in Spanish).
USA
 
  • Nevada
    • Humboldt Co.
      • Iron Point Mining District
        • Valmy
NBMG Spec. Pub. 31 Minerals of Nevada
  • Utah
    • Box Elder Co.
      • Grouse Creek Mts (Grouse Creek Range)
        • Rosebud Mining District
 
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