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Chudobaite

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About ChudobaiteHide

Formula:
(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O
Colour:
Rose, white, colorless
Hardness:
2½ - 3
Specific Gravity:
2.94
Crystal System:
Triclinic
Name:
Named for Karl Franz Johann Chudoba (10 August 1898, Wratzow, Moravia - 14 March 1976, Göttingen, Germany) was a mineralogist and petrologist and rector of the Rheinische Friedrich-Wilhelms-Universität in Bonn. Pronounced koo-dō-baite.
The Mg analogue of geigerite.


Classification of ChudobaiteHide

Approved
First Published:
1960
8.CE.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
39.2.6.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
20.3.16

20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg

Physical Properties of ChudobaiteHide

Transparency:
Transparent
Colour:
Rose, white, colorless
Hardness:
2½ - 3 on Mohs scale
Cleavage:
Very Good
{010} very good. {100} good.
Density:
2.94 g/cm3 (Measured)    

Optical Data of ChudobaiteHide

Type:
Biaxial (-)
RI values:
nα = 1.583 nβ = 1.608 nγ = 1.633
2V:
Measured: 79° , Calculated: 88°
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
small

Chemical Properties of ChudobaiteHide

Formula:
(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O
IMA Formula:
Mg5(AsO4)2(AsO3OH)2 · 10H2O

Crystallography of ChudobaiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 7.69 Å, b = 11.37 Å, c = 6.59 Å
α = 115.2°, β = 95.9°, γ = 94.1°
Ratio:
a:b:c = 0.676 : 1 : 0.58
Unit Cell V:
514.33 ų (Calculated from Unit Cell)

Type Occurrence of ChudobaiteHide

Place of Conservation of Type Material:
National School of Mines, Paris, France.
National Museum of Natural History, Washington, D.C., USA, 162628.
Reference:
Strunz, H. (1960) Chudobait, ein neues Mineral von Tsumeb. Neues Jahrbuch für Mineralogie, Monatshefte: 1–7.

Other Language Names for ChudobaiteHide

German:Chudobait
Spanish:Chudobaita

Relationship of Chudobaite to other SpeciesHide

Other Members of this group:
GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.
KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2OTric. 1 : P1
OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2OTric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Chudobaite associated with AdamiteZn2(AsO4)(OH)

Related Minerals - Nickel-Strunz GroupingHide

8.CE.XBabánekiteCu3(AsO4)2 · 8H2O Mon. 2/m : B2/m
8.CE.05GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.
8.CE.10NewberyiteMg(HPO4) · 3H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CE.15BrassiteMg(HAsO4) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.CE.20PhosphorrössleriteMg(HPO4) · 7H2OMon. 2/m : P2/b
8.CE.20RößleriteMg(HAsO4) · 7H2OMon. 2/m : B2/b
8.CE.25MetaswitzeriteMn2+3(PO4)2 · 4H2OMon. 2/m : P2/b
8.CE.25SwitzeriteMn2+3(PO4)2 · 7H2OMon.
8.CE.30LindackeriteCuCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2OTric. 1 : P1
8.CE.30VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CE.30KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2OTric. 1 : P1
8.CE.35BobierriteMg3(PO4)2 · 8H2OMon. 2/m : B2/b
8.CE.40AnnabergiteNi3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ArupiteNi3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40Barićite(Mg,Fe)3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ErythriteCo3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40FerrisymplesiteFe3+3(AsO4)2(OH)3 · 5H2O
8.CE.40HörnesiteMg3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40KöttigiteZn3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40ManganohörnesiteMn2+3(AsO4)2 · 8H2OMon. 2/m : P2/m
8.CE.40ParasymplesiteFe2+3(AsO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40VivianiteFe2+3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.40PakhomovskyiteCo3(PO4)2 · 8H2OMon. 2/m : B2/m
8.CE.45SymplesiteFe2+3(AsO4)2 · 8H2OTric. 1 : P1
8.CE.50CattiiteMg3(PO4)2 · 22H2OTric. 1 : P1
8.CE.55KoninckiteFe3+PO4 · 3H2OTet.
8.CE.60KaňkiteFeAsO4 · 3.5H2OMon. 2 : P2
8.CE.65SteigeriteAl(VO4) · 3H2OMon. 2/m : P21/m
8.CE.70MetaschoderiteAl2(PO4)(VO4) · 6H2OMon. 2/m : P2/m
8.CE.70SchoderiteAl2(PO4)(VO4) · 8H2OMon.
8.CE.75MalhmooditeFeZr(PO4)2 · 4H2OMon.
8.CE.75ZigrasiteMgZr(PO4)2 · 4H2OTric. 1 : P1
8.CE.75Unnamed (Ca-analogue of Zigrasite)CaZr[PO4]2 · 4H2OTric.
8.CE.80SantabarbaraiteFe3+3(PO4)2(OH)3 · 5H2OAmor.
8.CE.85Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)Tric. 1 : P1

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

39.2.6.1LindackeriteCuCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
39.2.6.2GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.
39.2.6.4VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
39.2.6.5PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
39.2.6.6OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.3.1AdamiteZn2(AsO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
20.3.2ParadamiteZn2(AsO4)(OH)Tric. 1 : P1
20.3.3KoritnigiteZn(HAsO4) · H2OTric. 1 : P1
20.3.4LegranditeZn2(AsO4)(OH) · H2OMon. 2/m : P21/b
20.3.5WarikahniteZn3(AsO4)2 · 2H2OTric. 1 : P1
20.3.6KöttigiteZn3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.3.7StranskiiteZn2Cu(AsO4)2Tric. 1 : P1
20.3.8Philipsburgite(Cu,Zn)6(AsO4,PO4)2(OH)6 · H2OMon.
20.3.9AustiniteCaZn(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.3.10ProsperiteCa2Zn4(AsO4)4 · H2OMon.
20.3.11GaititeCa2Zn(AsO4)2 · 2H2OTric. 1 : P1
20.3.12ZincroseliteCa2Zn(AsO4)2 · 2H2OMon.
20.3.13O'DanieliteNa(Zn,Mg)3H2(AsO4)3Mon. 2/m : B2/b
20.3.14JohilleriteNa(Mg,Zn)3Cu(AsO4)3Mon. 2/m : B2/b
20.3.15Holdenite(Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8Orth. mmm (2/m 2/m 2/m) : Ccca
20.3.17Chlorophoenicite(Mn,Mg)3Zn2(AsO4)(OH,O)6Mon. 2/m : B2/m
20.3.18LotharmeyeriteCaZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
20.3.19Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)Tric. 1 : P1
20.3.20OjuelaiteZnFe3+2(AsO4)2(OH)2 · 4H2OMon.
20.3.21FahleiteCaZn5Fe3+2(AsO4)6 · 14H2OOrth.
20.3.22KeyiteCu2+3Zn4Cd2(AsO4)6 · 2H2OMon. 2/m

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 ChudobaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Strunz, H. (1960) Chudobait, ein neues Mineral von Tsumeb. Neues Jahrbuch für Mineralogie, Monatshefte: 1–7.
Fleischer, M. (1960) New mineral names. American Mineralogist: 45: 1130-1136.
International Mineralogical Association (1962) International Mineralogical Association: Commission on new minerals and mineral names. Mineralogical Magazine: 33: 260-263.
Dorner, R., Weber, K. (1976) Die Kristallstruktur von Chudobait, (Mg,Zn)5H2[AsO4]4·10H2O. Naturwissenschaften: 63: 243-243.
Fleischer, M., Cabri, L.J., Nickel, E.H., Pabst, A. (1977) New mineral names. American Mineralogist: 62: 593-600.
Graeser, S., Schwander, H., Bianchi, R., Pilati, T., Gramaccioli, C M. (1989) Geigerite, the manganese analogue of chudobaite: Its description and crystal structure. American Mineralogist: 74: 676-684.

Internet Links for ChudobaiteHide

Localities for ChudobaiteHide

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.
Chile
 
  • Tarapacá
    • Iquique Province
      • Salar Grande
Kampf, A.R., Nash, B.P., Dini, M., Molina Donoso, A.A. (2013): Magnesiokoritnigite, Mg(AsO3OH)•H2O, from the Torrecillas mine, Iquique Province, Chile: the Mg-analogue of koritnigite. Mineralogical Magazine, 77, 3081-3092.
Morocco
 
  • Drâa-Tafilalet Region
Favreau, G. & Barral, J.-P. (2019): Bou Azzer 2007-2019 - Mineas et minéraux du district de Bou Azzer. Cahier des Micromonteurs, 145, 3-129.
Namibia (TL)
 
  • Oshikoto Region
    • Tsumeb
Neues Jahrb.Min.,Mh.(1960) 1-7
 
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