Chudobaite
A valid IMA mineral species
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About Chudobaite
Formula:
(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O
Colour:
Rose, white, colorless
Hardness:
2½ - 3
Specific Gravity:
2.94
Crystal System:
Triclinic
Member of:
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, Germany. Pronounced koo-dō-baite.
Unique Identifiers
Mindat ID:
1043
Long-form identifier:
mindat:1:1:1043:2
GUID
(UUID V4):
(UUID V4):
d0adc7e4-d075-4ff0-a529-ef40cdbebfb5
IMA Classification of Chudobaite
Approved
IMA Formula:
Mg5(AsO4)2(AsO3OH)2 · 10H2O
First published:
1960
Classification of Chudobaite
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
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
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
20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Cdb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Chudobaite
Transparency:
Transparent
Comment:
Good
Colour:
Rose, white, colorless
Hardness:
2½ - 3 on Mohs scale
Cleavage:
Very Good
{010} very good. {100} good.
{010} very good. {100} good.
Density:
2.94 g/cm3 (Measured) 2.93 g/cm3 (Calculated)
Optical Data of Chudobaite
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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
small
Chemistry of Chudobaite
Mindat Formula:
(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O
Crystallography of Chudobaite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.69 Å, b = 11.37 Å, c = 6.59 Å
α = 115.2°, β = 95.9°, γ = 94.1°
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)
Z:
1
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0019226 | Chudobaite | Dorner R, Weber K (1976) Die Kristallstruktur von Chudobait, (Mg,Zn)5H2[AsO4]4*10H2O because they were missing negative signs Naturwissenschaften 63 243-243 | 1976 | Tsumeb mine, Tsumeb, Namibia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
10.16 Å | (10) |
2.979 Å | (9) |
3.440 Å | (8) |
3.273 Å | (8) |
2.730 Å | (7) |
3.859 Å | (5) |
3.746 Å | (5) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Chudobaite
General Appearance of Type Material:
Crystals equant, to 5 mm
Place of Conservation of Type Material:
National School of Mines, Paris, France.
National Museum of Natural History, Washington, D.C., USA, 162628.
National Museum of Natural History, Washington, D.C., USA, 162628.
Associated Minerals at Type Locality:
Reference:
Strunz, H. (1960) Chudobait, ein neues Mineral von Tsumeb. Neues Jahrbuch für Mineralogie, Monatshefte: 1–7.
Other Language Names for Chudobaite
German:Chudobait
Spanish:Chudobaita
Relationship of Chudobaite to other Species
Member of:
Other Members of this group:
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Chudobaite associated with Picropharmacolite | Ca4Mg(AsO4)2(HAsO4)2 · 11H2O |
2 photos of Chudobaite associated with Erythrite | Co3(AsO4)2 · 8H2O |
1 photo of Chudobaite associated with Zincolivenite | CuZn(AsO4)(OH) |
1 photo of Chudobaite associated with Maghrebite | MgAl2(AsO4)2(OH)2 · 8H2O |
1 photo of Chudobaite associated with Symplesite | Fe2+3(AsO4)2 · 8H2O |
Related Minerals - Strunz-mindat Grouping
8.CE.X | Babánekite | Cu3(AsO4)2 · 8H2O |
8.CE. | Monteneroite | Cu2+Mn2+2(AsO4)2 · 8H2O |
8.CE.05 | Geigerite | Mn2+5(AsO4)2(HAsO4)2 · 10H2O |
8.CE.10 | Newberyite | Mg(PO3OH) · 3H2O |
8.CE.15 | Brassite | Mg(HAsO4) · 4H2O |
8.CE.20 | Phosphorrösslerite | Mg(PO3OH) · 7H2O |
8.CE.20 | Rösslerite | Mg(HAsO4) · 7H2O |
8.CE.25 | Metaswitzerite | Mn2+3(PO4)2 · 4H2O |
8.CE.25 | Switzerite | Mn2+3(PO4)2 · 7H2O |
8.CE.30 | Lindackerite | CuCu4(AsO4)2(HAsO4)2 · 9H2O |
8.CE.30 | Ondrušite | CaCu4(AsO4)2(HAsO4)2 · 10H2O |
8.CE.30 | Veselovskýite | ZnCu4(AsO4)2(HAsO4)2 · 9H2O |
8.CE.30 | Pradetite | CoCu4(AsO4)2(HAsO4)2 · 9H2O |
8.CE.30 | Klajite | MnCu4(AsO4)2(HAsO4)2 · 9-10H2O |
8.CE.30 | Hloušekite | (Ni,Co)Cu4(AsO4)2(AsO3OH)2 · 9H2O |
8.CE.35 | Bobierrite | Mg3(PO4)2 · 8H2O |
8.CE.40 | Annabergite | Ni3(AsO4)2 · 8H2O |
8.CE.40 | Arupite | Ni3(PO4)2 · 8H2O |
8.CE.40 | Barićite | (Mg,Fe)3(PO4)2 · 8H2O |
8.CE.40 | Erythrite | Co3(AsO4)2 · 8H2O |
8.CE.40 | Ferrisymplesite | Fe3+3(AsO4)2(OH)3 · 5H2O |
8.CE.40 | Hörnesite | Mg3(AsO4)2 · 8H2O |
8.CE.40 | Köttigite | Zn3(AsO4)2 · 8H2O |
8.CE.40 | Manganohörnesite | Mn2+3(AsO4)2 · 8H2O |
8.CE.40 | Parasymplesite | Fe2+3(AsO4)2 · 8H2O |
8.CE.40 | Vivianite | Fe2+Fe2+2(PO4)2 · 8H2O |
8.CE.40 | Pakhomovskyite | Co3(PO4)2 · 8H2O |
8.CE.45 | Symplesite | Fe2+3(AsO4)2 · 8H2O |
8.CE.50 | Cattiite | Mg3(PO4)2 · 22H2O |
8.CE.55 | Koninckite | Fe3+PO4 · 3H2O |
8.CE.60 | Kaňkite | FeAsO4 · 3.5H2O |
8.CE.60 | Hilarionite | Fe3+2(SO4)(AsO4)(OH) · 6H2O |
8.CE.65 | Steigerite | Al(VO4) · 3H2O |
8.CE.70 | Metaschoderite | Al2(PO4)(VO4) · 6H2O |
8.CE.70 | Schoderite | Al2(PO4)(VO4) · 8H2O |
8.CE.75 | Malhmoodite | FeZr(PO4)2 · 4H2O |
8.CE.75 | Zigrasite | MgZr(PO4)2 · 4H2O |
8.CE.75 | UM2009-11-PO:CaHZr | CaZr[PO4]2 · 4H2O |
8.CE.80 | Santabarbaraite | Fe3+3(PO4)2(OH)3 · 5H2O |
8.CE.85 | Metaköttigite | (Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH) |
8.CE.90 | Slavkovite | Cu13(AsO4)6(AsO3OH)4 · 23H2O |
Other Information
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 Chudobaite
mindat.org URL:
https://www.mindat.org/min-1043.html
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References for Chudobaite
Reference List:
Fleischer, M., Rooseboom, E. H., Skinner, Brian (1960) New Mineral Names; New data; Discredited minerals. American Mineralogist, 45 (9-10) 1130-1136
(1962) International Mineralogical Association: Commission on New Minerals and Mineral Names. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (258) 260-263 doi:10.1180/minmag.1962.033.258.09
Localities for Chudobaite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Chile | |
| Kampf et al. (2013) |
Germany | |
| Möhn et al. (08/2020) |
Morocco | |
| Favreau et al. (2019) |
| www.mindat.org (n.d.) |
"Le Cahier des Micromounteurs | |
Namibia (TL) | |
| Strunz (1960) +1 other reference |
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Vein No. 54, Aït Ahmane, Tansifte Caïdat, Agdz Cercle, Zagora Province, Drâa-Tafilalet Region, Morocco