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Clairite

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Formula:
(NH4)2Fe3(SO4)4(OH)3 · 3H2O
System:
Triclinic
Colour:
Orange-Yellow
Name:
Named for Mrs. Claire Martini, wife of Dr. J. C. J. Martini who first described mineral.
This page provides mineralogical data about Clairite.

Classification of Clairite

Approved 1982
7.DF.55

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations
31.10.8.1

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
10 : Miscellaneous
25.11.15

25 : Sulphates
11 : Sulphates of Fe and other metals
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Type Occurrence of Clairite

Place of Conservation of Type Material:
Museum of the Geological Survey of South Africa (now the Council for Geoscience), Pretoria, South Africa
Year of Discovery:
1982
Geological Setting of Type Material:
Alteration of pyrite and decaying organic material (Hyrex excreta).

Physical Properties of Clairite

Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Orange-Yellow
Density:
2.31 g/cm3 (Measured)    2.32 g/cm3 (Calculated)

Crystallography of Clairite

Crystal System:
Triclinic
Cell Parameters:
a = 9.36Å, b = 9.15Å, c = 52.61Å
α = 88.15°, β = 90°, γ = 118.36°
Ratio:
a:b:c = 1.023 : 1 : 5.75
Morphology:
Powdery aggregates of pseudo-hexagonal plates.
Comment:
1 or 1
X-Ray Powder Diffraction Data:
d-spacingIntensity
17.5 (100)
8.78 (100)
8.23 (20)
4.743 (15)
3.424 (20)
3.279 (25)
3.041 (20)

Optical Data of Clairite

Type:
Biaxial
RI values:
nα = 1.595 nγ = 1.607
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v or r < v
Pleochroism:
Weak
Comments:
X= pale yellow
Z'= dark yellow

Chemical Properties of Clairite

Formula:
(NH4)2Fe3(SO4)4(OH)3 · 3H2O
Essential elements:
All elements listed in formula:
Empirical Formula:
(NH4)2Fe33+(SO4)4(OH)3 · 3H2O

Relationship of Clairite to other Species

7.DF.05UklonskoviteNaMg(SO4)F · 2H2O
7.DF.10KainiteKMg(SO4)Cl · 3H2O
7.DF.15NatrochalciteNaCu2(SO4)2(OH) · 2H2O
7.DF.20MetasideronatriteNa2Fe(SO4)2(OH) · H2O
7.DF.20SideronatriteNa2Fe(SO4)2(OH) · 3H2O
7.DF.25DespujolsiteCa3Mn4+(SO4)2(OH)6 · 3H2O
7.DF.25FleischeritePb3Ge(SO4)2(OH)6 · 3H2O
7.DF.25SchaurteiteCa3Ge(SO4)2(OH)6 · 4H2O
7.DF.25MallestigitePb3Sb5+(SO4)(AsO4)(OH)6 · 3H2O
7.DF.30Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2O
7.DF.35MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2O
7.DF.40LannoniteMg2Ca4Al4(SO4)8F8 · 24H2O
7.DF.40VlodavetsiteAlCa2(SO4)2F2Cl · 4H2O
7.DF.45PeretaiteCa(SbO)4(SO4)2(OH)2 · 2H2O
7.DF.50GordaiteNaZn4(SO4)(OH)6Cl · 6H2O
7.DF.60ArzruniteCu4Pb2(SO4)(OH)4Cl6 · 2H2O (?)
7.DF.65ElyitePb4Cu(SO4)O2(OH)4 · H2O
7.DF.70YecoraiteFe33+Bi5(Te6+O4)2(Te4+O3)O9 · 9H2O
7.DF.75RiomarinaiteBi(SO4)(OH) · H2O
7.DF.80DukeiteBi243+Cr86+O57(OH)6 · 3H2O
7.DF.85XocolatliteCa2Mn24+(Te6+O6)2 · H2O
25.11.1NatrojarositeNaFe3(SO4)2(OH)6
25.11.2SideronatriteNa2Fe(SO4)2(OH) · 3H2O
25.11.3MetasideronatriteNa2Fe(SO4)2(OH) · H2O
25.11.4FerrinatriteNa3Fe(SO4)3 · 3H2O
25.11.5AmarilliteNaFe(SO4)2 · 6H2O
25.11.6YavapaiiteKFe(SO4)2
25.11.7KrausiteKFe(SO4)2 · H2O
25.11.8GoldichiteKFe(SO4)2 · 4H2O
25.11.9JarositeKFe3+ 3(SO4)2(OH)6
25.11.10VoltaiteK2Fe52+Fe33+Al(SO4)12 · 18H2O
25.11.11UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2O
25.11.12MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2O
25.11.13Sabieite(NH4)Fe3+(SO4)2
25.11.14Ammoniojarosite(NH4)Fe33+(SO4)2(OH)6
25.11.16Mohrite(NH4)2Fe(SO4)2 · 6H2O
25.11.17Lonecreekite(NH4)Fe3+(SO4)2 · 12H2O
25.11.18Godovikovite(NH4)Al(SO4)2
25.11.19BotryogenMgFe3+(SO4)2(OH) · 7H2O
25.11.21Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2O
25.11.23SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2O
25.11.24Millosevichite(Al,Fe)2(SO4)3
25.11.25AluminocopiapiteAl2/3Fe43+(SO4)6(OH)2 · 20H2O
25.11.26HalotrichiteFeAl2(SO4)4 · 22H2O
25.11.27Idrizite(Mg,Fe)(Al,Fe)2(SO4)3(OH)2 · 15H2O or near
25.11.28LishizheniteZnFe2(SO4)4 · 14H2O
25.11.29ZincovoltaiteK2Zn5Fe33+Al(SO4)12 · 18H2O

Other Names for Clairite

Name in Other Languages:
German:Clairit
Spanish:Clairita

Other Information

Other Information:
Slowly soluble in water.
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 Clairite

Reference List:
Martini, J. E. J. (1984): Lonecreekite, sabieite, and clairite, new secondary ammonium ferric-iron sulfates from Lone Creek Fall cave, near Sabie, eastern Transvaal. Annals of the Geological Survey (South Africa), 17, 29-34.

American Mineralogist: 71: 229.

Daltry, V.D.C., (1997) Mineralogy of South Africa: Type-Mineral Species and Type-Mineral Names, Council For Geoscience, Geological Survey of South Africa, Handbook 15.

Internet Links for Clairite

Localities for Clairite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Wolfach
        • Oberwolfach
          • Rankach valley
Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); WALENTA, K. (1997): Neue Mineralfunde von der Grube Clara 7. Folge. - Lapis 22 (11), 37-47.
  • North Rhine-Westphalia
    • Aachen
      • Alsdorf
XRD analysis (T. Witzke)
Hungary
 
  • Baranya Co.
    • Mecsek Mts
      • Komló
Mineral Species of Hungary, 2005
      • Pécs
Szakáll, S. & Kristály, F. (2008): Ammonium sulphates from burning coal dumps at Komló and Pécs-Vasas, Mecsek Mts., South Hungary. Mineralogia, Special Papers, Vol. 32 (2nd Central-European Mineralogical Conference 2008 (CEMC)), 154.
Poland
 
  • Upper Silesia (Śląskie)
    • Upper Silesian Coal Basin
      • Katowice area
Parafiniuk, J. and Kruszewski, Ł. (2009): Ammonium minerals from burning coal-dumps of the Upper Silesian Coal Basin (Poland). Geol. Quart., 53, 341-356. http://www.pgi.gov.pl/images/stories/G_Q/53_3/parafiniuk.pdf (esp. p. 347)]
        • Łaziska
Parafiniuk, J. and Kruszewski, Ł. (2009): Ammonium minerals from burning coal-dumps of the Upper Silesian Coal Basin (Poland). Geol. Quart., 53, 341-356. http://www.pgi.gov.pl/images/stories/G_Q/53_3/parafiniuk.pdf]
South Africa (TL)
 
  • Mpumalanga Province
    • Ehlanzeni District
      • Pilgrim's Rest
        • Sabie
Ann.Geol.Survey S.Africa,(1983) 17, 29-34; Daltry, V.D.C., (1997) Mineralogy of South Africa: Type-Mineral Species and Type-Mineral Names, Council For Geoscience, Geological Survey of South Africa, Handbook 15.
Mineral and/or Locality  
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