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Schaurteite

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Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
© 2004 ROM

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Formula:
Ca
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
 · 4H
 
2
O
System:HexagonalColour:White
Hardness:2½
Member of:Fleischerite Group
Name:For German chemist, Werner T. Schaurte (1893-1978).


Fleischerite Group.

Classification of Schaurteite

IMA status:Approved
Strunz 8th edition ID:6/D.11-20
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:31.7.6.2

31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
Hey's CIM Ref.:25.7.1

25 : Sulphates
7 : Sulphates of Pb
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Type Occurrence of Schaurteite

Type Locality:Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
Year of Discovery:1965

Physical Properties of Schaurteite

Lustre:Silky
Colour:White
Hardness (Mohs):2½

Crystallography of Schaurteite

Crystal System:Hexagonal
Class (H-M):6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:P63/mmc {P63/m 2/m 2/c}
Cell Parameters:a = 8.52Å, c = 10.80Å
Ratio:a:c = 1 : 1.268
Unit Cell Volume:V 678.94 ų (Calculated from Unit Cell)

Optical Data of Schaurteite

Type:Uniaxial (+)
RI values: nω = 1.569 nε = 1.581
Maximum Birefringence:δ = 0.012

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Schaurteite

Formula:
Ca
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
 · 4H
 
2
O
Essential elements:Ca, Ge, H, O, S
All elements listed in formula:Ca, Ge, H, O, S

Relationship of Schaurteite to other Species

Member of:Fleischerite Group
Other Members of Group:

- +
Despujolsite
Ca
 
3
Mn
4+
 
(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
Fleischerite
Pb
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
Mallestigite
Pb
 
3
Sb
5+
 
(SO
 
4
)(AsO
 
4
)(OH)
 
6
 · 3H
 
2
O
Unnamed (Ba-Sb Silicate-Sulphate-Hydroxide-Hydrate)
Ba
 
3
Sb
5+
 
[(Si,S)O
 
3
(OH)]
 
2
(OH,O)
 
6
 · 3H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
7.DF.05Uklonskovite
NaMg(SO
 
4
)F · 2H
 
2
O
7.DF.10Kainite
KMg(SO
 
4
)Cl · 3H
 
2
O
7.DF.15Natrochalcite
NaCu
 
2
(SO
 
4
)
 
2
(OH) · 2H
 
2
O
7.DF.20Metasideronatrite
Na
 
2
Fe(SO
 
4
)
 
2
(OH) · H
 
2
O
7.DF.20Sideronatrite
Na
 
2
Fe(SO
 
4
)
 
2
(OH) · 3H
 
2
O
7.DF.25Despujolsite
Ca
 
3
Mn
4+
 
(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
7.DF.25Fleischerite
Pb
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
7.DF.25Mallestigite
Pb
 
3
Sb
5+
 
(SO
 
4
)(AsO
 
4
)(OH)
 
6
 · 3H
 
2
O
7.DF.30Slavíkite
(H
 
3
O
+
 
)
 
3
Mg
 
6
Fe
 
15
(SO
 
4
)
 
21
(OH)
 
18
 · 99H
 
2
O
7.DF.35Metavoltine
Na
 
6
K
 
2
FeFe
 
6
(SO
 
4
)
 
12
O
 
2
 · 18H
 
2
O
7.DF.40Lannonite
HCa
 
4
Mg
 
2
Al
 
4
(SO
 
4
)
 
8
F
 
9
 · 32H
 
2
O
7.DF.40Vlodavetsite
AlCa
 
2
(SO
 
4
)
 
2
F
 
2
Cl · 4H
 
2
O
7.DF.45Peretaite
Ca(SbO)
 
4
(SO
 
4
)
 
2
(OH)
 
2
 · 2H
 
2
O
7.DF.50Gordaite
NaZn
 
4
(SO
 
4
)(OH)
 
6
Cl · 6H
 
2
O
7.DF.55Clairite
(NH
 
4
)
 
2
Fe
 
3
(SO
 
4
)
 
4
(OH)
 
3
 · 3H
 
2
O
7.DF.60Arzrunite
Cu
 
4
Pb
 
2
(SO
 
4
)(OH)
 
4
Cl
 
6
 · 2H
 
2
O (?)
7.DF.65Elyite
Pb
 
4
Cu(SO
 
4
)O
 
2
(OH)
 
4
 · H
 
2
O
7.DF.70Yecoraite
Fe
3+
3
Bi
 
5
(Te
6+
 
O
 
4
)
 
2
(Te
4+
 
O
 
3
)O
 
9
 · 9H
 
2
O
7.DF.75Riomarinaite
Bi(SO
 
4
)(OH) · H
 
2
O
7.DF.80Dukeite
Bi
3+
24
Cr
6+
8
O
 
57
(OH)
 
6
 · 3H
 
2
O
7.DF.85Xocolatlite
Ca
 
2
Mn
4+
2
(Te
6+
 
O
 
6
)
 
2
 · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.7.2Zircosulfate
(Zr,Ti)(SO
 
4
)
 
2
 · 4H
 
2
O
25.7.3Anglesite
PbSO
 
4
25.7.4Lanarkite
Pb
 
2
(SO
 
4
)O
25.7.5Palmierite
(K,Na)
 
2
Pb(SO
 
4
)
 
2
25.7.6Linarite
PbCu(SO
 
4
)(OH)
 
2
25.7.7Elyite
Pb
 
4
Cu(SO
 
4
)O
 
2
(OH)
 
4
 · H
 
2
O
25.7.8Chenite
Pb
 
4
Cu(SO
 
4
)
 
2
(OH)
 
6
25.7.9Osarizawaite
Pb(Al,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
25.7.10Itoite
Pb
 
3
Ge
4+
 
(SO
 
4
)
 
2
O
 
2
(OH)
 
2
25.7.11Fleischerite
Pb
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
 · 3H
 
2
O
25.7.12Beaverite-(Cu)
Pb(Fe
3+
 
,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
25.7.13Plumbojarosite
Pb
 
0.5
Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6

Other Names for Schaurteite

Other Languages:
German:Schaurteit
Spanish:Schaurteita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Schaurteite

Reference List:

- +
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.

American Mineralogist (1967): 52: 926.

American Mineralogist (1968): 53: 507.

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 Schaurteite

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    • Localities for Schaurteite

    The 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.
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    (TL) indicates type locality. ? 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.
    Namibia
     
    • Otjikoto (Oshikoto) 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.
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