Pseudosinhalite (original) (raw)
A valid IMA mineral species
About PseudosinhaliteHide
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Formula:
Mg2Al3(BO3)2(OH)O3
Specific Gravity:
3.508 (Calculated)
Crystal System:
Monoclinic
Name:
The name alludes to the optical, chemical, and structural similarity to sinhalite.
This page provides mineralogical data about Pseudosinhalite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:7257:7
b5f158ca-fea4-46a9-ab41-fde336023a3b
IMA Classification of PseudosinhaliteHide
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IMA Formula:
Mg2Al3B2O9(OH)
Classification of PseudosinhaliteHide
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6.AC.10
6 : BORATES
A : Monoborates
C : B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Pshl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Pss | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of PseudosinhaliteHide
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Density:
3.508 g/cm3 (Calculated)
Optical Data of PseudosinhaliteHide
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RI values:
_n_α = 1.691 _n_β = 1.713 _n_γ = 1.730
δ = 0.039
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
r > v or r < v
Chemistry of PseudosinhaliteHide
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Mindat Formula:
Mg2Al3(BO3)2(OH)O3
Crystallography of PseudosinhaliteHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 7.49(1) Å, b = 4.33(1) Å, c = 9.85(1) Å
β = 110.7(1)°
Ratio:
a:b:c = 1.73 : 1 : 2.275
Unit Cell V:
298.83 ų (Calculated from Unit Cell)
Comment:
Space group by analogy to synthetic material.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012323 | Pseudosinhalite | Daniels P, Krosse S, Werding G, Schreyer W (1997) "Pseudosinhalite", a new hydrous MgAl-borate: synthesis, phase characterization, crystal structure, and PT-stability Contributions to Mineralogy and Petrology 128 261-271 | 1997 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.14 Å | (100) |
| 1.625 Å | (100) |
| 2.102 Å | (60) |
| 3.21 Å | (40) |
| 2.61 Å | (40) |
| 1.607 Å | (40) |
| 1.399 Å | (40) |
Comments:
Tayezhnoe Fe-B skarn, Russia. The data are from Schreyer et al. (1998).
Geological EnvironmentHide
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Type Occurrence of PseudosinhaliteHide
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Place of Conservation of Type Material:
Institut für Mineralogie, Ruhr-Universität Bochum, Germany.
Geological Setting of Type Material:
As a replacement product of sinhalite, in an impure marble at the contact of a metasomatic iron boron deposit.
Associated Minerals at Type Locality:
Synonyms of PseudosinhaliteHide
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Other Language Names for PseudosinhaliteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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| 6.AC.05 | Sinhalite | MgAl(BO4) | Orth. m m m _(_2/_m_2/_m_2/m ) |
|---|---|---|---|
| 6.AC.15 | Béhierite | (Ta5+,Nb5+)(BO4) | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _I_41/a m d |
| 6.AC.15 | Schiavinatoite | (Nb,Ta)(BO4) | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _I_41/a m d |
| 6.AC.20 | Frolovite | Ca[B(OH)4]2 | Tric. 1 : _P_1 |
| 6.AC.25 | Hexahydroborite | Ca[B(OH)4]2 · 2H2O or CaB2O4 · 6H2O | Mon. 2/m : _B_2/b |
| 6.AC.30 | Henmilite | Ca2Cu[B(OH)4]2(OH)4 | Tric. 1 : _P_1 |
| 6.AC.35 | Bandylite | Cu[B(OH)4]Cl | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/n m m |
| 6.AC.40 | Teepleite | Na2[B(OH)4]Cl | Tet. 4/m m m _(_4/_m_2/_m_2/m ) : _P_4/n m m |
| 6.AC.45 | Moydite-(Y) | Y[B(OH)4](CO3) | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 6.AC.50 | Carboborite | Ca2Mg[B(OH)4]2(CO3)2 · 4H2O | Mon. 2/m |
| 6.AC.55 | Sulfoborite | Mg3[B(OH)4]2(SO4)(OH,F)2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 6.AC.60 | Lüneburgite | Mg3[B2(OH)6](PO4)2 · 6H2O | Tric. 1 : _P_1 |
| 6.AC.65 | Seamanite | Mn2+3[B(OH)4](PO4)(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 6.AC.70 | Cahnite | Ca2[B(OH)4](AsO4) | Tet. 4 : _P_4 |
Fluorescence of PseudosinhaliteHide
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Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for PseudosinhaliteHide
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References for PseudosinhaliteHide
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Reference List:
Daniels, Peter, Krosse, Sigrid, Werding, Günter, Schreyer, Werner (1997) "Pseudosinhalite", a new hydrous MgAl-borate: synthesis, phase characterization, crystal structure, and PT -stability. Contributions to Mineralogy and Petrology, 128 (2) 261-271 doi:10.1007/s004100050307
Schreyer, W., Pertsev, N. N., Medenbach, O., Burchard, M., Dettmar, D. (1998) Pseudosinhalite: discovery of the hydrous MgAl-borate as a new mineral in the Tayozhnoye, Siberia, skarn deposit. Contributions to Mineralogy and Petrology, 133 (4) 382-388 doi:10.1007/s004100050460
Bernhard, F., Hauzenberger, C., Walter, F., Kristiansen, R. (2008) Pseudosinhalite, magnesiotaaffeite-6N'3S and magnesiotaaffeite-2N'2S as replacement products of spinel in dolomite marble from Stubenberg, Styria, Austria. The Canadian Mineralogist, 46 (5) 1195-1205 doi:10.3749/canmin.46.5.1195
Localities for PseudosinhaliteHide
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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
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Austria | |
|---|---|
| Styria Hartberg-Fürstenfeld District Stubenberg am See ⓘ Stubenberg Quarry | Bernhard et al. (2008) |
| Russia (TL) | |
| Sakha Aldan ⓘ Tayezhnoe Fe-B skarn (Tayozhnoye) (TL) | Schreyer et al. (1998) +1 other reference |