Schlegelite
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Formula:
Bi7(AsO4)3(MoO4)2O4
Colour:
Yellow
Lustre:
Adamantine
Hardness:
3½
Specific Gravity:
7.23 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor of Fritz Herrmann Schlegel (12 March 1938, Barenstein, Saxony, Germany - 2012), mineral collector of Schneeberg, Germany, who first found the new mineral. He discovered eight minerals from the area.
This page provides mineralogical data about Schlegelite.
Classification of Schlegelite
Approved
Approval Year:
2003
First Published:
2006
7/B.30-30
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
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
O : With only large cations, (OH, etc.):RO4 about 1:1
43.3.3.1
43 : COMPOUND PHOSPHATES, ETC.
3 : Hydrated Normal Compound Phosphates, etc·
43 : COMPOUND PHOSPHATES, ETC.
3 : Hydrated Normal Compound Phosphates, etc·
Physical Properties of Schlegelite
Adamantine
Transparency:
Transparent
Colour:
Yellow
Streak:
Pale yellow
Hardness:
3½ on Mohs scale
Hardness:
VHN25=285 kg/mm2 - Vickers
Cleavage:
Distinct/Good
parallel to {010} and {001}
parallel to {010} and {001}
Density:
7.23 g/cm3 (Calculated)
Optical Data of Schlegelite
Type:
Biaxial (-)
Pleochroism:
Non-pleochroic
Chemical Properties of Schlegelite
Formula:
Bi7(AsO4)3(MoO4)2O4
IMA Formula:
Bi7O4(MoO4)2(AsO4)3
Elements listed:
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 V:
2047.2 ų
Z:
4
Morphology:
Lath-like crystals, elongated parallel to [100], with {010} (dominant), {001} and {100}.
Type Occurrence of Schlegelite
General Appearance of Type Material:
Dense spherical aggregates, composed of small lath-like crystals up to 0.3 mm in length
Place of Conservation of Type Material:
“Staatliches Museum für Mineralogie und Geologie“, Dresden, Germany, under catalogue number 19625Sa(MMG).
Associated Minerals at Type Locality:
Reference:
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.
Synonyms of Schlegelite
Related Minerals - Nickel-Strunz Grouping
| 8.BO.05 | Nacaphite | Na2Ca(PO4)F | Mon. 2/m : P21/b |
| 8.BO.10 | Preisingerite | Bi3(AsO4)2O(OH) | Tric. 1 : P1 |
| 8.BO.10 | Petitjeanite | Bi3(PO4)2O(OH) | Tric. |
| 8.BO.10 | Schumacherite | Bi3(VO4)2O(OH) | Tric. |
| 8.BO.15 | Atelestite | Bi2(AsO4)O(OH) | Mon. 2/m |
| 8.BO.15 | Hechtsbergite | Bi2(VO4)O(OH) | Mon. 2/m : P21/b |
| 8.BO.15 | Smrkovecite | Bi2(PO4)O(OH) | Mon. 2/m : P21/b |
| 8.BO.20 | Kombatite | Pb14(VO4)2O9Cl4 | Mon. |
| 8.BO.20 | Sahlinite | Pb14(AsO4)2O9Cl4 | Mon. |
| 8.BO.25 | Heneuite | CaMg5(CO3)(PO4)3(OH) | Tric. 1 : P1 |
| 8.BO.30 | Nefedovite | Na5Ca4(PO4)4F | Tric. |
| 8.BO.35 | Kuznetsovite | (Hg+2)Hg2+(AsO4)Cl | Iso. 2 3 : P21 3 |
| 8.BO.40 | Artsmithite | (Hg+2)2Al(PO4)1.74(OH)1.78 | Mon. 2/m : B2/b |
Related Minerals - Dana Grouping (8th Ed.)
| 43.3.3. | Birchite | Cd2Cu2(PO4)2(SO4) · 5H2O | Orth. mmm (2/m 2/m 2/m) : Pnma |
Other Information
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 Schlegelite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
Internet Links for Schlegelite
mindat.org URL:
https://www.mindat.org/min-26667.html
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Localities for Schlegelite
ⓘ - 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.
- 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).
All localities listed without proper references should be considered as questionable.
Germany (TL) | |
| 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 |