Strontioruizite
A valid IMA mineral species
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About Strontioruizite
Formula:
Sr2Mn3+2Si4O11(OH)4 · 2H2O
Colour:
Brown
Lustre:
Vitreous
Hardness:
5 - 5½
Specific Gravity:
3.20
Crystal System:
Monoclinic
Member of:
Name:
Named for being the strontium analogue of ruizite.
Unique Identifiers
Mindat ID:
52089
Long-form identifier:
mindat:1:1:52089:2
IMA Classification of Strontioruizite
Approved
IMA Formula:
Sr2Mn3+2Si4O11(OH)4·2H2O
Approval year:
2017
First published:
2021
Type description reference:
Yang, Hexiong, Gu, Xiangping, Cairncross, Bruce, Downs, Robert T., Evans, Stanley H. (2021) Taniajacoite and strontioruizite, two new minerals isostructural with ruizite from the N'Chwaning III Mine, Kalahari Manganese Field, South Africa. The Canadian Mineralogist, 59 (2) 431-444 doi:10.3749/canmin.2000037
Classification of Strontioruizite
9.BJ.35
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
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 |
|---|---|---|
| Srz | 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 Strontioruizite
Vitreous
Transparency:
Transparent
Colour:
Brown
Streak:
Very light brown
Hardness:
5 - 5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {010}
Good on {010}
Density:
3.20(2) g/cm3 (Measured) 3.16 g/cm3 (Calculated)
Optical Data of Strontioruizite
Type:
Biaxial (-)
RI values:
nα = 1.692(2) nβ = 1.734(2) nγ = 1.747(2)
2V:
Measured: 59.1° (5), Calculated: 56.6°
Max. Birefringence:
δ = 0.055
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:
Very High (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.
Chemistry of Strontioruizite
Mindat Formula:
Sr2Mn3+2Si4O11(OH)4 · 2H2O
Element Weights:
Common Impurities:
Al,Ba,Ca,Na
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| SiO2 | 35.31 % |
| Al2O3 | 0.03 % |
| Ga2O3 | 0.01 % |
| Cr2O3 | 0.01 % |
| Mn2O3* | 23.18 % |
| CaO | 1.51 % |
| SrO | 27.75 % |
| BaO | 0.04 % |
| Na2O | 0.05 % |
| F | 0.02 % |
| H2O (by stoichiometry) | 10.61 % |
| -O=F | -0.01 % |
| Total: | 98.51 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | Sr1.00(Sr0.82Ca0.18Ba0.01)Mn3+1.99[Si3.99O11(OH)2]([OH]1.99F0.01).2H2O |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | N'Chwaning III Mine, N'Chwaning Mines, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa | scattered patches of several intergrown Mn±Ba±Sr-silicates (strontioruizite, hennomartinite, cerchiaraite-(Mn)) with more abundant aluminosugilite/sugilite, pectolite, quartz and Na-Ca/Na-amphibole, in a Mn-metasomatite |
Crystallography of Strontioruizite
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
B2
Setting:
C2
Cell Parameters:
a = 9.1575(4) Å, b = 6.2857(4) Å, c = 12.0431(6) Å
β = 91.744(4)°
β = 91.744(4)°
Ratio:
a:b:c = 1.457 : 1 : 1.916
Unit Cell V:
692.9 ų
Twinning:
No macroscopic twinning observed
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.762 Å | (42) |
| 4.549 Å | (41) |
| 4.219 Å | (46) |
| 3.143 Å | (100) |
| 2.972 Å | (39) |
| 2.785 Å | (61) |
| 2.693 Å | (37) |
| 2.620 Å | (41) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits |
Type Occurrence of Strontioruizite
General Appearance of Type Material:
Brown radiating groups or aggregates of acicular or prismatic crystals, with individual crystals up to 1.3 × 0.2 × 0.2 mm.
Place of Conservation of Type Material:
Cotype material is deposited in the collections of the Mineral Museum, University of Arizona, Tucson, USA, catalogue # 21486, and the RRUFF Project, deposition # R160085
Associated Minerals at Type Locality:
Reference:
Yang, Hexiong, Gu, Xiangping, Cairncross, Bruce, Downs, Robert T., Evans, Stanley H. (2021) Taniajacoite and strontioruizite, two new minerals isostructural with ruizite from the N'Chwaning III Mine, Kalahari Manganese Field, South Africa. The Canadian Mineralogist, 59 (2) 431-444 doi:10.3749/canmin.2000037
Synonyms of Strontioruizite
Other Language Names for Strontioruizite
Dutch:Strontioruiziet
German:Strontioruizit
Relationship of Strontioruizite to other Species
Member of:
Other Members of Ruizite Group:
| Ruizite | Ca2Mn3+2[Si4O11(OH)2](OH)2 · 2H2O | Mon. 2 |
| Taniajacoite | SrCaMn3+2Si4O11(OH)4 · 2H2O | Tric. 1 |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.BJ. | Arsenmedaite | Mn2+6 As5+Si5O18(OH) |
| 9.BJ.05 | Orientite | Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| 9.BJ.10 | Rosenhahnite | HCa3[Si3O9(OH)] |
| 9.BJ.15 | Trabzonite | Ca4(Si3O9)(OH)2 |
| 9.BJ.20 | Thalénite-(Y) | Y3Si3O10F |
| 9.BJ.25 | Tiragalloite | Mn2+4As5+Si3O12(OH) |
| 9.BJ.30 | Medaite | Mn2+6V5+Si5O18(OH) |
| 9.BJ.35 | Ruizite | Ca2Mn3+2[Si4O11(OH)2](OH)2 · 2H2O |
| 9.BJ.35 | Taniajacoite | SrCaMn3+2Si4O11(OH)4 · 2H2O |
| 9.BJ.40 | Ardennite-(As) | Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6 |
| 9.BJ.40 | Kannanite | Ca4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 |
| 9.BJ.40 | Alpeite | Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6 |
| 9.BJ.40 | Ardennite-(V) | Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 |
| 9.BJ.45 | Kilchoanite | Ca6(SiO4)(Si3O10) |
| 9.BJ.50 | Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
| 9.BJ.50 | Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
| 9.BJ.55 | Zunyite | Al13Si5O20(OH,F)18Cl |
| 9.BJ.60 | Hubeite | Ca2Mn2+Fe3+Si4O12(OH) · 2H2O |
| 9.BJ.65 | Cassagnaite | (Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8 |
| 9.BJ.70 | Pavlovskyite | Ca8(SiO4)2(Si3O10) |
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 Strontioruizite
mindat.org URL:
https://www.mindat.org/min-52089.html
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References for Strontioruizite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2017) New minerals and nomenclature modifications approved in 2017, CNMNC Newsletter No 39. Mineralogical Magazine, 81 (5) 1279-1286 doi:10.1180/minmag.2017.081.072
Yang, Hexiong, Gu, Xiangping, Cairncross, Bruce, Downs, Robert T., Evans, Stanley H. (2021) Taniajacoite and strontioruizite, two new minerals isostructural with ruizite from the N'Chwaning III Mine, Kalahari Manganese Field, South Africa. The Canadian Mineralogist, 59 (2) 431-444 doi:10.3749/canmin.2000037
Localities for Strontioruizite
Showing 2 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.
South Africa (TL) | |
| Hålenius et al. (2017) +1 other reference |
| Marko Burkhardt Collection |
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Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa