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Schaurteite

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About SchaurteiteHide

Formula:
Ca3Ge(SO4)2(OH)6 · 4H2O
Colour:
White
Lustre:
Silky
Hardness:
Specific Gravity:
2.65
Crystal System:
Hexagonal
Name:
For German chemist, Werner T. Schaurte (May 22, 1893 - June 25, 1978).

Classification of SchaurteiteHide

Approved
7.DF.25

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
F : With large and medium-sized cations
31.7.6.2

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
25.7.1

25 : Sulphates
7 : Sulphates of Pb

Physical Properties of SchaurteiteHide

Silky
Transparency:
Translucent
Colour:
White
Hardness:
2½ on Mohs scale
Density:
2.65 g/cm3 (Measured)    2.64 g/cm3 (Calculated)

Optical Data of SchaurteiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.569 nε = 1.581
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemical Properties of SchaurteiteHide

Formula:
Ca3Ge(SO4)2(OH)6 · 4H2O
IMA Formula:
Ca3Ge(SO4)2(OH)6 · 3H2O

Crystallography of SchaurteiteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mmc
Cell Parameters:
a = 8.525 Å, c = 10.803 Å
Ratio:
a:c = 1 : 1.267
Unit Cell V:
679.93 ų (Calculated from Unit Cell)
Z:
2

Type Occurrence of SchaurteiteHide

General Appearance of Type Material:
needlelike crystals
Place of Conservation of Type Material:
The holotype is missing from the Technical University, Berlin, Germany; National School of Mines, Paris, France; National Museum of Natural History, Washington, D.C., USA, 144520.
Geological Setting of Type Material:
secondary mineral formed in the oxidized zone of a dolostone-hosted hydrothermal polymetallic ore deposit.
Associated Minerals at Type Locality:

Other Language Names for SchaurteiteHide

German:Schaurteit
Spanish:Schaurteita

Relationship of Schaurteite to other SpeciesHide

Other Members of this group:
DespujolsiteCa3Mn4+(SO4)2(OH)6 · 3H2OHex. 6 m2 : P62c
FleischeritePb3Ge(SO4)2(OH)6 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
GenplesiteCa3Sn(SO4)2(OH)6·3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
MallestigitePb3Sb5+(SO4)(AsO4)(OH)6 · 3H2OHex. 6 : P63
Unnamed (Ba-Sb Silicate-Sulphate-Hydroxide-Hydrate)Ba3Sb5+[(Si,S)O3(OH)]2(OH,O)6 · 3H2O Trig. 3 : P3

Common AssociatesHide

Associated Minerals Based on Photo Data:
Germanite10 photos of Schaurteite associated with Germanite on mindat.org.
Ludlockite4 photos of Schaurteite associated with Ludlockite on mindat.org.
Tennantite4 photos of Schaurteite associated with Tennantite on mindat.org.
Zincian Siderite3 photos of Schaurteite associated with Zincian Siderite on mindat.org.
Calcite2 photos of Schaurteite associated with Calcite on mindat.org.
Siderite1 photo of Schaurteite associated with Siderite on mindat.org.
Smithsonite1 photo of Schaurteite associated with Smithsonite on mindat.org.

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.AlcaparrosaiteK3Ti4+Fe3+(SO4)4O(H2O)2Mon. 2/m : B2/b
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.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.55Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2OTric.
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 - Dana Grouping (8th Ed.)Hide

31.7.6.1DespujolsiteCa3Mn4+(SO4)2(OH)6 · 3H2OHex. 6 m2 : P62c
31.7.6.3FleischeritePb3Ge(SO4)2(OH)6 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.7.2Zircosulfate(Zr,Ti)(SO4)2 · 4H2OOrth.
25.7.3AnglesitePbSO4Orth. mmm (2/m 2/m 2/m) : Pnma
25.7.4LanarkitePb2(SO4)OMon. 2/m : B2/m
25.7.5Palmierite(K,Na)2Pb(SO4)2Trig. 3m (3 2/m) : R3m
25.7.6LinaritePbCu(SO4)(OH)2Mon. 2/m : P21/m
25.7.7ElyitePb4Cu(SO4)O2(OH)4 · H2OMon. 2/m
25.7.8ChenitePb4Cu(SO4)2(OH)6Tric. 1 : P1
25.7.9OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
25.7.10ItoitePb3Ge4+(SO4)2O2(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
25.7.11FleischeritePb3Ge(SO4)2(OH)6 · 3H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
25.7.12Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
25.7.13PlumbojarositePb0.5Fe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m

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 SchaurteiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Strunz, H. & Tennyson, C. (1967): Schaurteit, ein neues Germanium-Mineral von Tsumeb/SW-Afrika und seine Paragenese. In: Festschrift Dr. Werner Schaurte. Bauer & Schaurte, Eds., Neuss/Rhein (Germany), 33-47.
Fleischer M (1967) New mineral names, American Mineralogist (1967): 52: 926.
Fleischer M (1968) New mineral names, American Mineralogist (1968): 53: 507.
Taylor H F W (1973) Crystal structures of some double hydroxide minerals, Mineralogical Magazine: 39: 377-389.
Origlieri, M. J. and Downs, R. T. (2013): Schaurteite, Ca3Ge(SO4)2(OH)6•3H2O. Acta Crystallogr. E69, i6.

Internet Links for SchaurteiteHide

Localities for SchaurteiteHide

ⓘ - 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.
Namibia (TL)
 
  • Oshikoto Region (Otjikoto Region)
    • Tsumeb
Strunz, H. & Tennyson, C. (1967): Schaurteit, ein neues Germaniun-Mineral von Tsumeb/SW-Afrika und seine Paragenese. In: Festschrift Dr. Werner Schaurte. Bauer & Schaurte, Eds., Neuss/Rhein (Germany), 33-47.
Mineral and/or Locality  
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