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Chaidamuite

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Formula:
ZnFe3+(SO4)2(OH) · 4H2O
Colour:
Brown to yellowish-brown
Lustre:
Vitreous
Hardness:
2½ - 3
Specific Gravity:
2.722
Crystal System:
Triclinic
Name:
From the type locality.
The lower hydrate counterpart of zincobotryogen.


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Classification of ChaidamuiteHide

Approved
Approval Year:
1985
7.DC.30

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
C : With only medium-sized cations; chains of edge-sharing octahedra
31.9.7.2

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
25.5.12

25 : Sulphates
5 : Sulphates of Zn and Hg

Physical Properties of ChaidamuiteHide

Vitreous
Transparency:
Translucent
Colour:
Brown to yellowish-brown
Streak:
Pale yellow
Hardness:
2½ - 3 on Mohs scale
Cleavage:
Perfect
(100) (001)
Fracture:
Conchoidal
Density:
2.722(2) g/cm3 (Measured)    2.72 g/cm3 (Calculated)

Optical Data of ChaidamuiteHide

Type:
Biaxial (+)
RI values:
nα = 1.632 nβ = 1.640 nγ = 1.688
2V:
Measured: 44° , Calculated: 46°
Max Birefringence:
δ = 0.056
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
strong r < v
Pleochroism:
Strong
Comments:
X= pale yellow, colorless
Y= pale yellow
z= Brownish yellow

Chemical Properties of ChaidamuiteHide

Formula:
ZnFe3+(SO4)2(OH) · 4H2O

Crystallography of ChaidamuiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 7.309(2) Å, b = 7.202(2) Å, c = 9.691(3) Å
α = 89.64(3)°, β = 105.89(1)°, γ = 91.11(1)°
Ratio:
a:b:c = 1.015 : 1 : 1.346
Unit Cell V:
490.54 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Thick tabular to pseudocubic crystals, grains and granular aggregates.

Type Occurrence of ChaidamuiteHide

Place of Conservation of Type Material:
Geology and Mineralogy Resources Museum of Ministry of Geology, Beijing, China.
Geological Setting of Type Material:
Oxidized zone of galena-sphalerite-pyrite deposit

Synonyms of ChaidamuiteHide

Other Language Names for ChaidamuiteHide

German:Chaidamuit
Spanish:Chaidamuita

Related Minerals - Nickel-Strunz GroupingHide

7.DC.05AluminiteAl2(SO4)(OH)4 · 7H2OMon. 2/m : P21/b
7.DC.05Meta-aluminiteAl2(SO4)(OH)4 · 5H2O
7.DC.10ButleriteFe3+(SO4)(OH) · 2H2OMon. 2/m : P21/m
7.DC.10ParabutleriteFe3+(SO4)(OH) · 2H2OOrth. mmm (2/m 2/m 2/m)
7.DC.15FibroferriteFe3+(SO4)(OH) · 5H2OMon.
7.DC.20XitieshaniteFe3+(SO4)Cl · 6H2OMon.
7.DC.25BotryogenMgFe3+(SO4)2(OH) · 7H2OMon. 2/m
7.DC.25Zincobotryogen(Zn,Mg,Mn2+)Fe3+(SO4)2(OH) · 7H2OMon. 2/m
7.DC.30GuilditeCuFe3+(SO4)2(OH) · 4H2OMon.

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

31.9.7.1GuilditeCuFe3+(SO4)2(OH) · 4H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.5.1ZinkositeZnSO4Orth.
25.5.2GoslariteZnSO4 · 7H2OOrth. 2 2 2 : P21 21 21
25.5.3NamuwiteZn4(SO4)(OH)6 · 4H2OTrig. 3 : P3
25.5.4KtenasiteZn(Cu,Zn)4(SO4)2(OH)6 · 6H2OMon.
25.5.5Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2OMon. 2/m
25.5.6Boyleite(Zn,Mg)SO4 · 4H2OMon. 2/m : P21/b
25.5.7SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2OMon. 2/m : B2/b
25.5.8OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2OOrth. mm2 : Pca21
25.5.9ZincaluminiteZn6Al6(SO4)2(OH)16 · 5H2O
25.5.10Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2OHex.
25.5.11GunningiteZnSO4 · H2OMon. 2/m : B2/b
25.5.13Bianchite(Zn,Fe)SO4 · 6H2OMon. 2/m : P2/m
25.5.15Zincmelanterite(Zn,Cu,Fe)SO4 · 7H2OMon.
25.5.16Zincobotryogen(Zn,Mg,Mn2+)Fe3+(SO4)2(OH) · 7H2OMon. 2/m
25.5.17SchuetteiteHg2+3(SO4)O2Trig. 3 2 : P31 2 1
25.5.18Gianellaite[(NHg2)2](SO4)(H2O)xIso. 4 3m : F4 3m

Fluorescence of ChaidamuiteHide

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 ChaidamuiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Li Wanmao, Chen Guoying, and Peng Zhizhong (1986): Chaidamuite - A new zinc and ferric sulfate mineral. Acta Mineralogica Sinica 6(2), 109-13 (in Chinese, English abstract). - American Mineralogist (1987), 73, 1493 (abstract); American Mineralogist (1989), 75, 1436 (abstract).
Li Wanmao and Q. Wang (1990): Determination and refinement of the crystal structure of chaidamuite. Sci. China, Ser. B 33, 623-630.

Internet Links for ChaidamuiteHide

Localities for ChaidamuiteHide

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.
China (TL)
 
  • Qinghai Province
    • Haixi Autonomous Prefecture
      • Da Qaidam Co. (Dachaidan Co.)
        • Xitieshan
Wanmao Li, Guoying Chen, and Zhizhong Peng (1986): Acta Mineralogica Sinica 6(2), 109-114
USA
 
  • Nevada
    • Humboldt Co.
      • Osgood Mts
        • Potosi District
          • Adam Peak
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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