Strontioginorite
A valid IMA mineral species - grandfathered
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About Strontioginorite
Formula:
CaSrB14O20(OH)6 · 5H2O
Colour:
Colourless
Lustre:
Greasy, Silky
Hardness:
2 - 3
Specific Gravity:
2.25
Crystal System:
Monoclinic
Name:
In allusion to its composition, with dominant strontium and its relationship to Ginorite.
Unique Identifiers
Mindat ID:
3741
Long-form identifier:
mindat:1:1:3741:5
IMA Classification of Strontioginorite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1959
Classification of Strontioginorite
6.FC.15
6 : BORATES
F : Hexaborates
C : Phyllo-hexaborates
6 : BORATES
F : Hexaborates
C : Phyllo-hexaborates
26.6.7.2
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
6 : Hexaborates
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
6 : Hexaborates
9.3.32
9 : Borates
3 : Borates of Ca and Sr
9 : Borates
3 : Borates of Ca and Sr
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 |
|---|---|---|
| Sgnr | 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 Strontioginorite
Greasy, Silky
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
2 - 3 on Mohs scale
Cleavage:
Perfect
(010) perfect, (001) very good
(010) perfect, (001) very good
Comment:
Easily deformed
Density:
2.25(1) g/cm3 (Measured) 2.265 g/cm3 (Calculated)
Optical Data of Strontioginorite
Type:
Biaxial (+)
RI values:
nα = 1.512 nβ = 1.524 nγ = 1.577
2V:
Measured: 53° , Calculated: 54°
Max. Birefringence:
δ = 0.065
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.
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.
Surface Relief:
Moderate
Dispersion:
strong
Chemistry of Strontioginorite
Mindat Formula:
CaSrB14O20(OH)6 · 5H2O
Element Weights:
Crystallography of Strontioginorite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 12.817(8) Å, b = 14.448(8) Å, c = 12.783(8) Å
β = 101.42(8)°
β = 101.42(8)°
Ratio:
a:b:c = 0.887 : 1 : 0.885
Unit Cell V:
2,320.29 ų (Calculated from Unit Cell)
Morphology:
Forms include (110), (010), and (111). Also (001), (100), (250), (131), (141).
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0006023 | Strontioginorite | Grice J D (2005) Strontioginorite: crystal-structure analysis and hydrogen bonding The Canadian Mineralogist 43 1019-1026 |  | 2005 | 0 | 293 | |
| 0000214 | Strontioginorite | Konnert J A, Clark J R, Christ C L (1970) Crystal structure of strontioginorite, (Sr,Ca)2B14O20(OH)6.5H2O American Mineralogist 55 1911-1931 | | 1970 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.25 Å | (very strong) |
| 2.10 Å | (strong) |
| 5.40 Å | (medium) |
| 3.92 Å | (medium) |
| 3.34 Å | (medium) |
| 1.19 Å | (medium) |
| 4.75 Å | (medium weak) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Strontioginorite
General Appearance of Type Material:
Crystals up to 3 mm long, 1 mm wide, and 0.5 mm.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 114168.
Associated Minerals at Type Locality:
Synonyms of Strontioginorite
Other Language Names for Strontioginorite
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 6.FC.05 | Nobleite | CaB6O9(OH)2 · 3H2O |
| 6.FC.05 | Tunellite | SrB6O9(OH)2 · 3H2O |
| 6.FC.10 | Strontioborite | Sr[B8O11(OH)4] |
| 6.FC.15 | Ginorite | Ca2B14O20(OH)6 · 5H2O |
| 6.FC.20 | Fabianite | CaB3O5(OH) |
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 Strontioginorite
mindat.org URL:
https://www.mindat.org/min-3741.html
Please feel free to link to this page.
Please feel free to link to this page.
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Mineral Dealers:
References for Strontioginorite
Reference List:
Braitsch, Otto (1959) Über Strontioginorit, eine neue Ginorit-Varietät aus dem Zechsteinsalz. Beiträge zur Mineralogie und Petrographie, 6 (6). 366-370 doi:10.1007/bf01206338
Konnert, Judith A., Clark, Joan R., Christ, and C. L. (1970) Crystal structure of strontioginorite, (Sr,Ca)2B14O20(OH)6·5H2O. American Mineralogist, 55 (11-12) 1911-1931
Grice, J. D. (2005) Strontioginorite: crystal-structure analysis and hydrogen bonding. The Canadian Mineralogist, 43 (3) 1019-1026 doi:10.2113/gscanmin.43.3.1019
Grice, J. D., Gault, R. A., Van Velthuizen, J. (2005) Borate minerals of the Penobsquis and Millstream deposits, southern New Brunswick, Canada. The Canadian Mineralogist, 43 (5) 1469-1487 doi:10.2113/gscanmin.43.5.1469
Localities for Strontioginorite
Showing 8 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.
Argentina | |
| Helvaci +2 other references |
Canada | |
| Grice et al. (2005) |
| Grice (2002) | |
| Grice et al. (2005) |
Germany (TL) | |
| Braitsch (1959) |
| Siemroth (2008) |
Kazakhstan | |
| Коротченкова et al. (2016) |
| Pekov et al. (2020) |
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Kohnstein Quarry, Niedersachswerfen, Harztor, Nordhausen District, Thuringia, Germany