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Schlegelite

Formula:
Bi
 
7
[O
 
4
|(MoO
 
4
)
 
2
|(AsO
 
4
)
 
3
]
System:OrthorhombicColour:Yellow
Hardness:3½
Name:For Fritz Schlegel, mineral collector of Schneeberg, Germany, who first found the new mineral.
This page provides mineralogical data about Schlegelite.

Classification of Schlegelite

IMA status:Approved 2003
Strunz 8th edition ID:7/B.30-30
Nickel-Strunz 10th (pending) edition ID:8.BO.45

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
O : With only large cations, (OH, etc.):RO4 about 1:1
Dana 8th edition ID:43.3.3.1

43 : COMPOUND PHOSPHATES, ETC.
3 : Hydrated Normal Compound Phosphates, etc·
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Type Occurrence of Schlegelite

Type Locality:Pucher Shaft, Wolfgang Maaßen Mine field, Schneeberg District, Erzgebirge, Saxony, Germany
General Appearance of Type Material:Dense spherical aggregates, composed of small lath-like crystals up to 0.3 mm in length
Associated Minerals at type locality:
SilléniteQuartzPucheritePetitjeaniteBismuth

Physical Properties of Schlegelite

Lustre:Adamantine
Diaphaneity (Transparency):Transparent
Colour:Yellow
Streak:Pale yellow
Hardness (Mohs):3½
Hardness (Vickers):VHN25=285 kg/mm2
Cleavage:Distinct/Good
parallel to {010} and {001}
Density (calculated):7.23 g/cm3

Crystallography of Schlegelite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 5.299(1) Å, b = 16.133(4) Å, c = 23.948(5) Å
Ratio:a:b:c = 0.328 : 1 : 1.484
Unit Cell Volume:V 2047.2 ų
Z:4
Morphology:Lath-like crystals, elongated parallel to [100], with {010} (dominant), {001} and {100}.

Optical Data of Schlegelite

Type:Biaxial (-)
Pleochroism:Non-pleochroic

Chemical Properties of Schlegelite

Formula:
Bi
 
7
[O
 
4
|(MoO
 
4
)
 
2
|(AsO
 
4
)
 
3
]
All elements listed in formula:As, Bi, Mo, O
Analyical Data:Results from electron microprobe analysis
Empirical formula based on 24 oxygen atoms per formula unit
Bi2O3  (70.20)
PbO     (0.48)
CaO     (0.05)
P2O5    (0.51)
As2O5  (15.38)
V2O5    (0.21)
MoO3   (12.13)

total   98.96 wt.-%
Empirical Formula:
Bi
 
6.78
Pb
 
0.05
Ca
 
0.02
O
 
3.51
(MoO
 
4
)
 
1.90
(PO
 
4
)
 
0.16
(VO
 
4
)
 
0.05
(AsO
 
4
)
 
3.01

Relationship of Schlegelite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BO.05Nacaphite
Na
 
2
Ca[F|PO
 
4
]
8.BO.10Preisingerite
Bi
 
3
[O|OH|(AsO
 
4
)
 
2
]
8.BO.10Petitjeanite
Bi
 
3
[O|OH|(PO
 
4
)
 
2
]
8.BO.10Schumacherite
Bi
 
3
[O|OH|(VO
 
4
)
 
2
]
8.BO.15Atelestite
Bi
 
8
[O
 
5
|(OH)
 
5
|(AsO
 
4
)
 
3
]
8.BO.15Hechtsbergite
Bi
 
2
[O|OH|VO
 
4
]
8.BO.15Smrkovecite
Bi
 
2
[O|OH|PO
 
4
]
8.BO.20Kombatite
Pb
 
14
[O
 
9
|(VO
 
4
)
 
2
|Cl
 
4
]
8.BO.20Sahlinite
Pb
 
14
[O
 
9
|(AsO
 
4
)
 
2
|Cl
 
4
]
8.BO.25Heneuite
CaMg
 
5
(CO
 
3
)(PO
 
4
)
 
3
OH
8.BO.30Nefedovite
Na
 
5
Ca
 
4
(PO
 
4
)
 
4
F
8.BO.35Kuznetsovite
(Hg-Hg)Hg
2+
 
[Cl|AsO
 
4
]
8.BO.40Artsmithite
(Hg-Hg)
2+
2
Al[(OH)
 
1+3x
|(PO
 
4
)
 
2-x
] (x ≈ 0.26)

Other Names for Schlegelite

Synonyms:
IMA2003-051
Other Languages:

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 Schlegelite

Reference List:Lapis 30(7/8):69 (2005)

Krause, K., Bernhardt, H.-J., Effenberger, H. (2006): Schlegelite, Bi7O4(MoO4)2(AsO4)3, a new mineral from Schneeberg, Saxony, Germany. European Journal of Mineralogy, 18, 803-811.

Articles/Blogs about Schlegelite

Internet Links for Schlegelite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    Localities for Schlegelite

    (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.
    Germany
     
    • Saxony
      • Erzgebirge
        • Schneeberg District
          • Wolfgang Maaßen Mine field
    		Krause, K., Bernhardt, H.-J., Effenberger, H. (2006): Schlegelite, Bi7O4(MoO4)2(AsO4)3, a new mineral from Schneeberg, Saxony, Germany. European Journal of Mineralogy, 18, 803-811; Acta Cryst. (2004), A60, p. 192
    Mineral and/or Locality
    Google
     
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