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Čechite

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Alexander Shaft (Alexander Mine), Vrančice, Příbram, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic
© Thomas Witzke

Show Čechite Photos (6)



Formula:
Pb(Fe
2+
 
,Mn
2+
 
)(VO
 
4
)(OH)
System:OrthorhombicColour:Black
Hardness:4½ - 5
Member of:Adelite-Descloizite Group
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.

Classification of Čechite

IMA status:Approved
Strunz 8th edition ID:7/B.27-40
Nickel-Strunz 10th (pending) edition ID: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 edition ID: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
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Type Occurrence of Čechite

Type Locality:Alexander Shaft (Alexander Mine), Vrančice, Příbram, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic
Year of Discovery:1981

Physical Properties of Čechite

Lustre:Resinous, Sub-Metallic
Diaphaneity (Transparency):Opaque
Colour:Black
Streak:Black
Hardness (Mohs):4½ - 5
Tenacity:Brittle
Cleavage:None Observed
Fracture:Conchoidal
Density (measured):5.88 g/cm3
Density (calculated):5.94 g/cm3

Crystallography of Čechite

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 Volume:V 437.62 ų (Calculated from Unit Cell)
Z:4
Morphology:Rounded crystals; anhedral.
Twinning:None reported.
Comment:SG Pnam
X-Ray Powder Diffraction:
d-spacingIntensity
5.119 (77)
4.249 (51)
3.345 (42)
3.228 (100)
2.908 (77)
2.663 (53)
2.625 (81)
Comments:ICDD 35-530

Optical Data of Čechite

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 Čechite

Formula:
Pb(Fe
2+
 
,Mn
2+
 
)(VO
 
4
)(OH)
Essential elements:Fe, H, O, Pb, V
All elements listed in formula:Fe, H, Mn, O, Pb, V

Relationship of Čechite to other Species

Member of:Adelite-Descloizite Group
Other Members of Group:

- +
Adelite
CaMg(AsO
 
4
)(OH)
Arsendescloizite
PbZn(AsO
 
4
)(OH)
Austinite
CaZn(AsO
 
4
)(OH)
Cobaltaustinite
CaCo(AsO
 
4
)(OH)
Conichalcite
CaCu(AsO
 
4
)(OH)
Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
Duftite
PbCu(AsO
 
4
)(OH)
Gabrielsonite
PbFe(AsO
 
4
)(OH)
Gottlobite
CaMg(VO
 
4
,AsO
 
4
)(OH)
Hermannroseite
CaCu(PO
 
4
)(OH)
Mottramite
PbCu(VO
 
4
)(OH)
Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)
Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
Tangeite
CaCu(VO
 
4
)(OH)
Related Minerals - Nickel-Strunz Grouping):

- +
8.BH.05Thadeuite
Ca(Mg,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
(OH,F)
 
2
8.BH.10Durangite
NaAl(AsO
 
4
)F
8.BH.10Isokite
CaMg(PO
 
4
)F
8.BH.10Lacroixite
NaAl(PO
 
4
)F
8.BH.10Maxwellite
NaFe
3+
 
(AsO
 
4
)F
8.BH.10Panasqueiraite
CaMg(PO
 
4
)(OH,F)
8.BH.10Tilasite
CaMg(AsO
 
4
)F
8.BH.15Drugmanite
Pb(Fe
3+
 
,Al)
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BH.20Bjarebyite
(Ba,Sr)(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Cirrolite
Ca
 
3
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
 (?)
8.BH.20Kulanite
Ba(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Penikisite
Ba(Mg,Fe
2+
 
,Ca)
 
2
Al
 
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Perloffite
Ba(Mn
2+
 
,Fe
2+
 
)
 
2
Fe
3+
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.20Johntomaite
BaFe
2+
2
Fe
3+
2
(PO
 
4
)
 
3
(OH)
 
3
8.BH.25Bertossaite
(Li,Na)
 
2
(Ca,Fe
2+
 
,Mn
2+
 
)Al
 
4
(PO
 
4
)
 
4
(OH,F)
 
4
8.BH.25Palermoite
(Li,Na)
 
2
(Sr,Ca)Al
 
4
(PO
 
4
)
 
4
(OH)
 
4
8.BH.30Carminite
PbFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.30Sewardite
CaFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.35Adelite
CaMg(AsO
 
4
)(OH)
8.BH.35Arsendescloizite
PbZn(AsO
 
4
)(OH)
8.BH.35Austinite
CaZn(AsO
 
4
)(OH)
8.BH.35Cobaltaustinite
CaCo(AsO
 
4
)(OH)
8.BH.35Conichalcite
CaCu(AsO
 
4
)(OH)
8.BH.35Duftite
PbCu(AsO
 
4
)(OH)
8.BH.35Gabrielsonite
PbFe(AsO
 
4
)(OH)
8.BH.35Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)
8.BH.35Tangeite
CaCu(VO
 
4
)(OH)
8.BH.35Gottlobite
CaMg(VO
 
4
,AsO
 
4
)(OH)
8.BH.35Hermannroseite
CaCu(PO
 
4
)(OH)
8.BH.40Descloizite
Pb(Zn,Cu)(VO
 
4
)(OH)
8.BH.40Mottramite
PbCu(VO
 
4
)(OH)
8.BH.40Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
8.BH.45Bayldonite
PbCu
 
3
(AsO
 
4
)
 
2
(OH)
 
2
8.BH.45Vésigniéite
BaCu
 
3
(VO
 
4
)
 
2
(OH)
 
2
8.BH.50Paganoite
NiBi(AsO
 
4
)O
8.BH.55Jagowerite
BaAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
8.BH.55Carlgieseckeite-(Nd)
NaNdCa
 
3
(PO
 
4
)
 
3
F
8.BH.60Attakolite
(Ca,Sr)Mn(Al,Fe)
 
4
(HPO
 
4
,PO
 
4
)
 
3
(SiO
 
4
,PO
 
4
)(OH)
 
4
8.BH.65Leningradite
PbCu
 
3
(VO
 
4
)
 
2
Cl
Related Minerals - Hey's Index Grouping:

- +
21.4.1Uvanite
U
6+
2
V
5+
6
O
 
21
 · 15H
 
2
O (?)
21.4.2Vanuranylite
(H
 
3
O)
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 4H
 
2
O
21.4.3Strelkinite
Na
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 6H
 
2
O
21.4.4Carnotite
K
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 3H
 
2
O
21.4.5Margaritasite
(Cs,K,H
 
3
O)
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · H
 
2
O
21.4.6Sengierite
Cu
 
2
(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 6H
 
2
O
21.4.7Metatyuyamunite
Ca(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 3-5H
 
2
O
21.4.8Tyuyamunite
Ca(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 5-8H
 
2
O
21.4.9Rauvite
Ca(UO
 
2
)
 
2
(V
 
10
O
 
28
) · 16H
 
2
O
21.4.10Francevillite
(Ba,Pb)(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 5H
 
2
O
21.4.11Metavanuralite
Al(UO
 
2
)
 
2
(VO
 
4
)
 
2
(OH) · 8H
 
2
O
21.4.12Vanuralite
Al(UO
 
2
)
 
2
(VO
 
4
)
 
2
(OH) · 11H
 
2
O
21.4.13Curienite
Pb(UO
 
2
)
 
2
(VO
 
4
)
 
2
 · 5H
 
2
O
21.4.14Fritzscheite
Mn(UO
 
2
)
 
2
(PO
 
4
,VO
 
4
)
 
2
 · 10H
 
2
O (?)
21.4.15Palenzonaite
(Ca,Na)
 
3
CaMn
2+
2
(VO
 
4
)
 
3
21.4.16Santafeite
(Na,Ca,Sr)
 
12
(Mn
2+
 
,Fe
3+
 
,Al,Mg)
 
8
Mn
4+
8
(VO
 
4
)
 
16
(OH,O)
 
20
 · 8H
 
2
O
21.4.17Pyrobelonite
PbMn
2+
 
(VO
 
4
)(OH)
21.4.18Brackebuschite
Pb
 
2
(Mn
3+
 
,Fe
3+
 
)(VO
 
4
)
 
2
(OH)
21.4.20Heyite
Pb
 
5
Fe
2+
2
(VO
 
4
)
 
2
O
 
4
21.4.21Mounanaite
PbFe
3+
2
(VO
 
4
)
 
2
 · 2(OH,F)
21.4.22Schubnelite
Fe
3+
 
VO
 
4
 · H
 
2
O
21.4.23Fervanite
Fe
3+
4
V
5+
4
O
 
16
 · 5H
 
2
O
21.4.24Kazakhstanite
Fe
3+
5
V
4+
3
V
5+
12
O
 
39
(OH)
 
9
 · 9H
 
2
O
21.4.25Bokite
(Al,Fe
3+
 
)
 
1.3
(V
5+
 
,V
4+
 
,Fe
3+
 
)
 
8
O
 
20
 · 7.4H
 
2
O
21.4.26Rusakovite
(Fe
3+
 
,Al)
 
5
(VO
 
4
,PO
 
4
)
 
2
(OH)
 
9
 · 3H
 
2
O
21.4.27Kolovratite
Ni
 
x
Zn
 
y
(VO
 
4
)
 
0.67(x+y)
 · nH
 
2
O

Other Names for Čechite

Other Languages:
German:Čechit
Russian:Чехит
Spanish:Čechita

Other Information

Fluorescence in UV light:Not fluorescent.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Čechite

Reference List:

- +
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 Čechite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Čechite details from Handbook of Mineralogy (PDF)
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    • Localities for Čechite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
        • Příbram
          • Vrančice
    		[Neues Jahrb.(1981) 520-528; Lapis 1995, 12, p.13-24]
    J.Hyrsl (1992)
    Italy
     
    • Liguria
      • Savona Province
        • Magliolo
    		Balestra, C. & Armellino, G. (2004): I minerali del giacimento di Isallo. Notiziario di Mineralogia e Paleontologia Ferrania Club, 18, 17-21.
    USA
     
    • Nevada
      • Humboldt Co.
        • Iron Point District
          • Valmy
    		NBMG Spec. Pub. 31 Minerals of Nevada
    • Utah
      • Box Elder Co.
        • Grouse Creek Mts
          • Rosebud District
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