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Clairite

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About ClairiteHide

Formula:
(NH4)2Fe3(SO4)4(OH)3 · 3H2O
Colour:
Orange-Yellow
Specific Gravity:
2.31
Crystal System:
Triclinic
Name:
Named for Mrs. Claire Martini, wife of Dr. J. C. J. Martini who first described mineral.
Very slowly soluble in water. Chemically related to Unnamed (Fe analogue of huizingite-(Al)), the second both basic and hydrated NH4-Fe sulphate mineral after clairite. Compare also, e.g., carlsonite, lonecreekite; mohrite.


Classification of ClairiteHide

Approved
Approval Year:
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

Physical Properties of ClairiteHide

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

Optical Data of ClairiteHide

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 ClairiteHide

Formula:
(NH4)2Fe3(SO4)4(OH)3 · 3H2O
IMA Formula:
(NH4)2Fe3+3(SO4)4(OH)3 · 3H2O

Crystallography of ClairiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 9.36 Å, b = 9.15 Å, c = 52.61 Å
α = 88.15°, β = 90°, γ = 118.36°
Ratio:
a:b:c = 1.023 : 1 : 5.75
Unit Cell V:
3,962.29 ų (Calculated from Unit Cell)
Morphology:
Powdery aggregates of pseudo-hexagonal plates.
Comment:
1 or 1

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
17.5 Å(100)
8.78 Å(100)
8.23 Å(20)
4.743 Å(15)
3.424 Å(20)
3.279 Å(25)
3.041 Å(20)

Type Occurrence of ClairiteHide

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

Synonyms of ClairiteHide

Other Language Names for ClairiteHide

German:Clairit
Spanish:Clairita

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Clairite associated with RostiteAl(SO4)(OH) · 5H2O
1 photo of Clairite associated with Adranosite-(Fe)(NH4)4NaFe3+2(SO4)4Cl(OH)2
1 photo of Clairite associated with MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2O
1 photo of Clairite associated with Ammoniomagnesiovoltaite(NH4)2Mg2+5Fe3+3Al(SO4)12 · 18H2O
1 photo of Clairite associated with Tschermigite(NH4)Al(SO4)2 · 12H2O

Related Minerals - Nickel-Strunz GroupingHide

7.DF.Aldridgeite(Cd,Ca)(Cu,Zn)4(SO4)2(OH)6 · 3H2O Mon. 2/m : B2/b
7.DF.ChromschieffelinitePb10Te6+6O20(OH)14(CrO4)(H2O)5Orth. 2 2 2 : C2 2 21
7.DF.AlcaparrosaiteK3Ti4+Fe3+(SO4)4O(H2O)2Mon. 2/m : B2/b
7.DF.Ammoniomathesiusite(NH4)5(UO2)4(SO4)4(VO5)·4H2OTet. 4/m : P4/n
7.DF.05UklonskoviteNaMg(SO4)F · 2H2OMon.
7.DF.10KainiteKMg(SO4)Cl · 3H2OMon. 2/m : B2/m
7.DF.15NatrochalciteNaCu2(SO4)2(OH) · 2H2OMon. 2/m : B2/m
7.DF.20MetasideronatriteNa2Fe(SO4)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
7.DF.20SideronatriteNa2Fe(SO4)2(OH) · 3H2OOrth. 2 2 2 : P21 21 21
7.DF.25DespujolsiteCa3Mn4+(SO4)2(OH)6 · 3H2OHex. 6 m2 : P62c
7.DF.25FleischeritePb3Ge(SO4)2(OH)6 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DF.25SchaurteiteCa3Ge(SO4)2(OH)6 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.DF.25MallestigitePb3Sb5+(SO4)(AsO4)(OH)6 · 3H2OHex. 6 : P63
7.DF.30Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2OTrig. 3 : R3
7.DF.35MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2OTrig.
7.DF.40LannoniteMg2Ca4Al4(SO4)8F8 · 24H2O Tet. 4/m : I4/m
7.DF.40VlodavetsiteAlCa2(SO4)2F2Cl · 4H2OTet. 4/m : I4/m
7.DF.45PeretaiteCa(SbO)4(SO4)2(OH)2 · 2H2OMon. 2/m : B2/b
7.DF.50GordaiteNaZn4(SO4)(OH)6Cl · 6H2OTrig. 3 : P3
7.DF.60ArzruniteCu4Pb2(SO4)(OH)4Cl6 · 2H2O (?)Orth.
7.DF.65ElyitePb4Cu(SO4)O2(OH)4 · H2OMon. 2/m
7.DF.70YecoraiteFe3+3Bi5(Te6+O4)2(Te4+O3)O9 · 9H2O
7.DF.75RiomarinaiteBi(SO4)(OH) · H2OMon. 2/m
7.DF.80DukeiteBi3+24Cr6+8O57(OH)6 · 3H2OTrig. 3m : P3 1c
7.DF.85XocolatliteCa2Mn4+2(Te6+O6)2 · H2OMon. 2/m : P2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.11.1NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
25.11.2SideronatriteNa2Fe(SO4)2(OH) · 3H2OOrth. 2 2 2 : P21 21 21
25.11.3MetasideronatriteNa2Fe(SO4)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
25.11.4FerrinatriteNa3Fe(SO4)3 · 3H2OTrig. 3 : P3
25.11.5AmarilliteNaFe(SO4)2 · 6H2OMon. 2/m : B2/b
25.11.6YavapaiiteKFe(SO4)2Mon. 2/m : B2/m
25.11.7KrausiteKFe(SO4)2 · H2OMon. 2/m : P21/m
25.11.8GoldichiteKFe(SO4)2 · 4H2OMon. 2/m : P21/b
25.11.9JarositeKFe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
25.11.10VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
25.11.11UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
25.11.12MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2OTrig.
25.11.13Sabieite(NH4)Fe3+(SO4)2Trig. 3 2 : P3 2 1
25.11.14Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
25.11.16Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
25.11.17Lonecreekite(NH4)Fe3+(SO4)2 · 12H2OIso.
25.11.18Godovikovite(NH4)Al(SO4)2Trig. 3 2 : P3 2 1
25.11.19BotryogenMgFe3+(SO4)2(OH) · 7H2OMon. 2/m
25.11.21Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2OTrig. 3 : R3
25.11.23SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
25.11.24Millosevichite(Al,Fe)2(SO4)3Trig. 3 : R3
25.11.25AluminocopiapiteAl2/3Fe3+4(SO4)6(OH)2 · 20H2OTric. 1 : P1
25.11.26HalotrichiteFeAl2(SO4)4 · 22H2OMon. 2 : P2
25.11.27Idrizite(Mg,Fe)(Al,Fe)2(SO4)3(OH)2 · 15H2O or near
25.11.28LishizheniteZnFe2(SO4)4 · 14H2OTric. 1 : P1
25.11.29ZincovoltaiteK2Zn5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c

Other InformationHide

Notes:
Very 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 ClairiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 ClairiteHide

Localities for ClairiteHide

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.
Germany
 
  • Baden-Württemberg
    • Freiburg
      • Ortenaukreis
        • Oberwolfach
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
    • Cologne
      • Aachen
        • Alsdorf
Witzke, T., de Wit, F., Kolitsch, U. and Blaß, G. (2015): Mineralogy of the Burning Anna I Coal Mine Dump, Alsdorf, Germany. Chapter 7, pp. 203-240, in: Stracher, G. B., Prakash, A. and Sokol, E. V.: Coal and Peat Fires: A Global Perspective, Volume 3: Case Studies - Coal Fires, Elsevier, 786 pp.
Hungary
 
  • Baranya County
    • 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.
Italy
 
  • Campania
    • Naples
      • Pozzuoli
- Russo, M., Campostrini, I., Demartin, F. (2017): I minerali di origine fumarolica dei Campi Flegrei: Solfatara di Pozzuoli (Napoli) e dintorni. Micro, 15, 122-192.
Poland
 
  • Silesian Voivodeship
    • Rybnik Co.
      • Gmina Czerwionka-Leszczyny
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)]
South Africa (TL)
 
  • Mpumalanga
    • Ehlanzeni District
      • Pilgrim's Rest
        • Sabie
          • Lone Creek Falls
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.
USA
 
  • Ohio
    • Huron Co.
      • Huron River
Dr Pete Richards
 
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