Strontiohurlbutite
A valid IMA mineral species
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Formula:
SrBe2(PO4)2
Colour:
light blue
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
3.101 (Calculated)
Crystal System:
Monoclinic
Name:
Named in 2012 by C. Rao, R. Wang, X. Gu, H. Hu, and C. Dong for being the Sr analogue of hurlbutite.
Isostructural with:
Sr-dominant analogue of hurlbutite. Compare minjiangite which is not a true (structural-chemical) but just chemical (Ba) analogue.
The structure has paracelsian topology; as such, the species may alternatively be grouped within "paracelsian group", alongside with danburite, pekovite, maleevite, paracelsian, and hurlbutite.
The structure has paracelsian topology; as such, the species may alternatively be grouped within "paracelsian group", alongside with danburite, pekovite, maleevite, paracelsian, and hurlbutite.
Unique Identifiers
Mindat ID:
43357
Long-form identifier:
mindat:1:1:43357:8
IMA Classification of Strontiohurlbutite
Classification of Strontiohurlbutite
8.00.
8 : PHOSPHATES, ARSENATES, VANADATES
0 :
0 :
8 : PHOSPHATES, ARSENATES, VANADATES
0 :
0 :
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Shrb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Strontiohurlbutite
Vitreous
Transparency:
Transparent, Translucent
Colour:
light blue
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Density:
3.101 g/cm3 (Calculated)
Optical Data of Strontiohurlbutite
Type:
Biaxial (-)
RI values:
nα = 1.563(2) nβ = 1.569(2) nγ = 1.572(3)
2V:
Measured: 68.5° (5), Calculated: 70°
Max. Birefringence:
δ = 0.009
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
weak dispersion, r > v,
Pleochroism:
Non-pleochroic
Chemistry of Strontiohurlbutite
Mindat Formula:
SrBe2(PO4)2
Element Weights:
Elements listed:
Crystallography of Strontiohurlbutite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 8.426(5) Å, b = 8.998(5) Å, c = 8.005(4) Å
β = 90.05(5)°
β = 90.05(5)°
Ratio:
a:b:c = 0.936 : 1 : 0.89
Unit Cell V:
606.92 ų (Calculated from Unit Cell)
Z:
4
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
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Labels
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020033 | Strontiohurlbutite | Rao C, Wang R, Hatert F, Gu X, Ottolini L, Hu H, Dong C, Bo F D, Baijot M (2014) Strontiohurlbutite, SrBe2(PO4)2, a new mineral from Nanping No. 31 pegmatite, Fujian Province, Southeastern China American Mineralogist 99 494-499 | 2014 | Nanping No. 31 pegmatite, Fujian Province, Southeastern China | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.554 Å | (100) |
| 3.355 Å | (51) |
| 3.073 Å | (38) |
| 2.542 Å | (67) |
| 2.230 Å | (42) |
| 2.215 Å | (87) |
| 2.046 Å | (54) |
| 1.714 Å | (32) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Strontiohurlbutite
General Appearance of Type Material:
platy, subhedral-to-anhedral, with a length from 5 mm to 1.5 mm
Place of Conservation of Type Material:
In the collections of the Geological Museum of China,Yangrou Hutong, Xisi, Beijing, People’s Republic of China, catalogue number M11803 Laboratory of Mineralogy, University of Liège, catalog number 20387
Geological Setting of Type Material:
a highly evolved and well-zoned pegmatite
Associated Minerals at Type Locality:
Synonyms of Strontiohurlbutite
Other Language Names for Strontiohurlbutite
Dutch:Strontiohurlbutiet
German:Strontiohurlbutit
Related Minerals - Strunz-mindat Grouping
| 8.00. | Canutite | NaMn3[AsO4][AsO3(OH)]2 |
| 8.00. | Metauramphite | (NH4)2(UO2)2(PO4)2.6H2O |
| 8.00. | Chongite | Ca3Mg2(AsO4)2(AsO3OH)2 · 4H2O |
| 8.00. | Grandaite | Sr2Al(AsO4)2(OH) |
| 8.00. | 'UM1997-10-AsO:CaV' | Ca(VO)2(AsO4)2.4H2O |
| 8.00.05 | 'Leobenite' | Hydrated Ca-Fe phosphate |
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.
Internet Links for Strontiohurlbutite
mindat.org URL:
https://www.mindat.org/min-43357.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Strontiohurlbutite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2012) New minerals and nomenclature modifications approved in 2012. CNMNC Newsletter No 14. Mineralogical Magazine, 76 (5) 1281-1288 doi:10.1180/minmag.2012.076.5.15
Rao, C., Wang, R., Hatert, F., Gu, X., Ottolini, L., Hu, H., Dong, C., Dal Bo, F., Baijot, M. (2014) Strontiohurlbutite, SrBe2(PO4)2, a new mineral from Nanping No. 31 pegmatite, Fujian Province, Southeastern China. American Mineralogist, 99 (2) 494-499 doi:10.2138/am.2014.4547
Localities for Strontiohurlbutite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
China (TL) | |
| Rao +7 other references |
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