Strontiojoaquinite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Strontiojoaquinite
Formula:
Sr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2O
Colour:
Green, yellow-green, yellow-brown
Hardness:
5½
Specific Gravity:
3.68 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named as the strontium member of the joaquinite group of minerals.
Found as 1M, 2O, and 4O polytypes.
Type material crystals were zoned with a joaquinite core.
Type material crystals were zoned with a joaquinite core.
Unique Identifiers
Mindat ID:
3740
Long-form identifier:
mindat:1:1:3740:8
IMA Classification of Strontiojoaquinite
Approved
IMA Formula:
(Na,Fe2+)2Ba2Sr2Ti4+2(SiO3)8(O,OH)2·H2O
First published:
1982
Classification of Strontiojoaquinite
9.CE.25
9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
60.1.1a.2
60 : CYCLOSILICATES Four-Membered Rings
1 : Four-Membered Rings, as Titanosilicates
60 : CYCLOSILICATES Four-Membered Rings
1 : Four-Membered Rings, as Titanosilicates
14.9.14
14 : Silicates not Containing Aluminum
9 : Silicates of Ti
14 : Silicates not Containing Aluminum
9 : Silicates of Ti
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 |
|---|---|---|
| Sjq | 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 Strontiojoaquinite
Transparency:
Translucent
Colour:
Green, yellow-green, yellow-brown
Hardness:
5½ on Mohs scale
Cleavage:
Distinct/Good
{001} good
{001} good
Density:
3.68 g/cm3 (Calculated)
Optical Data of Strontiojoaquinite
Type:
Biaxial (+)
RI values:
nα = 1.710(2) nβ = 1.718(2) nγ = 1.780(3)
2V:
Measured: 35° to 45°, Calculated: 42°
Max. Birefringence:
δ = 0.070
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.
Dispersion:
r > v strong
Optical Extinction:
X:a = 19°; Y = b, Z = c.
Pleochroism:
Weak
Comments:
X = Y (colorless) < Z (yellow).
Comments:
Absorption X = Y < Z
Chemistry of Strontiojoaquinite
Mindat Formula:
Sr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2O
Element Weights:
Common Impurities:
Li
Crystallography of Strontiojoaquinite
Crystal System:
Monoclinic
Cell Parameters:
a = 10.516(6) Å, b = 9.764(5) Å, c = 11.87(1) Å
β = 109.28(8)°
β = 109.28(8)°
Ratio:
a:b:c = 1.077 : 1 : 1.216
Unit Cell V:
1,150.44 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Steep bipyramids with forms {111} and {110} and truncated with a small basal face {001}.
Twinning:
Submicroscopic twinning.
Comment:
Point Group: 2; m; or 2/m: ; Space Group: P 2; Pm; or P 2/m:
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.801 Å | (100) |
| 2.967 Å | (72) |
| 3.011 Å | (48) |
| 2.923 Å | (45) |
| 2.611 Å | (42) |
| 4.47 Å | (40) |
| 2.432 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 8 : Mafic igneous rocks | |
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 13 : Hadean serpentinization |
Type Occurrence of Strontiojoaquinite
General Appearance of Type Material:
Steep bipyramidal crystals to 1 mm.
Place of Conservation of Type Material:
1) University of California, Santa Barbara, California, USA.
2) Harvard University, Cambridge, Massachusetts, USA, 119526.
3) National Museum of Natural History, Washington, D.C., USA, 149429.
2) Harvard University, Cambridge, Massachusetts, USA, 119526.
3) National Museum of Natural History, Washington, D.C., USA, 149429.
Geological Setting of Type Material:
Metamorphosed basalt, included as a tectonic block within the a serpentine body. The basaltic was subjected to high pressure metamorphism, and to considerable compositional modification by fluids during the emplacement of the peridotite and serpentinization.
Associated Minerals at Type Locality:
Other Language Names for Strontiojoaquinite
Relationship of Strontiojoaquinite to other Species
Member of:
Other Members of Joaquinite Group:
| Bario-orthojoaquinite | (Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O | Orth. |
| Byelorussite-(Ce) | NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2O | Orth. mm2 : Ama2 |
| Dutkevichite-(Ce) | NaZnBa2Ce2Ti2Si8O26F · H2O | Orth. mm2 : Ama2 |
| Joaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O | Mon. 2 : B2 |
| Orthojoaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O | Orth. |
| Orthojoaquinite-(La) | NaBa2La2Fe2+Ti2[Si4O12]2O2(O,OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Strontio-orthojoaquinite | (Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2O | Orth. |
Common Associates
Associations Based on Photo Data:
| 12 photos of Strontiojoaquinite associated with Albite | Na(AlSi3O8) |
| 8 photos of Strontiojoaquinite associated with 'Crossite' | |
| 4 photos of Strontiojoaquinite associated with Fresnoite | Ba2Ti(Si2O7)O |
| 2 photos of Strontiojoaquinite associated with Analcime | Na(AlSi2O6) · H2O |
| 1 photo of Strontiojoaquinite associated with Stevensite | (Ca,Na)xMg3-x(Si4O10)(OH)2 |
| 1 photo of Strontiojoaquinite associated with Benitoite | BaTi(Si3O9) |
| 1 photo of Strontiojoaquinite associated with Neptunite | KNa2Li(Fe2+)2Ti2[Si4O12]2 |
Related Minerals - Strunz-mindat Grouping
| 9.CE. | Dutkevichite-(Ce) | NaZnBa2Ce2Ti2Si8O26F · H2O |
| 9.CE. | Katanite | Ba3NbFe3Si2O14 |
| 9.CE. | Niobobaotite | Ba4(Ti2.5Fe2+1.5)Nb4Si4O28Cl |
| 9.CE. | Amaterasuite | Sr4Ti6Si4O23(OH)Cl |
| 9.CE. | Steiningerite | Ba2Zr2(Si4O12)O2 |
| 9.CE.05 | Papagoite | CaCu[H3AlSi2O9] |
| 9.CE.10 | Verplanckite | Ba4Mn2+2Si4O12(OH,H2O)3Cl3 |
| 9.CE.15 | Baotite | Ba4(Ti,Nb,W)8O16(SiO3)4Cl |
| 9.CE.20 | Nagashimalite | Ba4(V,Ti)4B2Si8O27(O,OH)2Cl |
| 9.CE.20 | Taramellite | Ba4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2Clx |
| 9.CE.20 | Titantaramellite | Ba4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2Clx |
| 9.CE.25 | Bario-orthojoaquinite | (Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O |
| 9.CE.25 | Byelorussite-(Ce) | NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2O |
| 9.CE.25 | Joaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O |
| 9.CE.25 | Orthojoaquinite-(La) | NaBa2La2Fe2+Ti2[Si4O12]2O2(O,OH) · H2O |
| 9.CE.25 | Orthojoaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O |
| 9.CE.25 | Strontio-orthojoaquinite | (Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2O |
| 9.CE.30e | Labuntsovite-Mn | Na4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10-12H2O |
| 9.CE.30b | Tsepinite-Na | Na2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
| 9.CE.30c | Gjerdingenite-Na | K2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2O |
| 9.CE.30h | Alsakharovite-Zn | NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O |
| 9.CE.30c | Burovaite-Ca | (Na,K)4Ca2(Ti,Nb)8(Si4O12)4(OH,O)8 · 12H2O |
| 9.CE.30a | Nenadkevichite | (Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O |
| 9.CE.30b | Tsepinite-Sr | Sr(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
| 9.CE.30c | Gjerdingenite-Mn | K2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
| 9.CE.30b | Paratsepinite-Na | (Na,Sr,K,Ca)7(Ti,Nb)8(Si4O12)4(O,OH)8 · nH2O n ~ 8 |
| 9.CE.30d | Lemmleinite-K | K2(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2O |
| 9.CE.30c | Karupmøllerite-Ca | (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2O |
| 9.CE.30c | Lepkhenelmite-Zn | (Ba,K)2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O |
| 9.CE.30h | Gutkovaite-Mn | K2CaMn(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2O |
| 9.CE.30e | Labuntsovite-Mg | Na4K4(Ba,K)2Mg(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2O |
| 9.CE.30e | Labuntsovite-Fe | Na4K4(Ba,K)2Fe2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2O |
| 9.CE.30c | Kuzmenkoite-Zn | K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4 · 6-8H2O |
| 9.CE.30f | Paralabuntsovite-Mg | Na8K8Mg4Ti16(Si4O12)8(OH,O)16 · 20-24H2O |
| 9.CE.30d | Lemmleinite-Ba | Na2K2Ba(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2O |
| 9.CE.30g | Organovaite-Mn | K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4 · 5-7H2O |
| 9.CE.30g | Organovaite-Zn | K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
| 9.CE.30b | Vuoriyarvite-K | K2(Nb,Ti)2(Si4O12)(O,OH)2 · 4H2O |
| 9.CE.30c | Gjerdingenite-Fe | K2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
| 9.CE.30a | 'Unnamed (Ca-Na-ordered analogue of Korobitsynite)' | (Ca,Na)2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2O |
| 9.CE.30g | Parakuzmenkoite-Fe | (K,Ba)4Fe(Ti,Nb)8(Si4O12)4(O,OH)8 · 14H2O |
| 9.CE.30a | Korobitsynite | (Na,◻)4Ti2(Si4O12)(O,OH)2 · 4H2O |
| 9.CE.30c | Kuzmenkoite-Mn | K2Mn2+(Ti,Nb)4(Si4O12)2(OH,O)4 · 5-6H2O |
| 9.CE.30b | Tsepinite-K | K2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
| 9.CE.30b | Paratsepinite-Ba | Ba4(Ti,Nb)8(Si4O12)4(OH,O)8 · 8H2O |
| 9.CE.30h | Neskevaaraite-Fe | K3Na2Fe2+(Ti,Nb)4(Si4O12)2(O,OH)4 · 5-6 H2O |
| 9.CE.30c | Gjerdingenite-Ca | K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
| 9.CE.30b | Tsepinite-Ca | (Ca,K,Na)2-x(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2O |
| 9.CE.45 | 'Natrokomarovite' | (Na,Ca,H)2Nb2Si2O10(OH,F)2 · H2O |
| 9.CE.45 | Komarovite | (Ca,Mn)(Nb,Ti)2[Si2O7](O,F)3 · 3.5H2O |
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 Strontiojoaquinite
mindat.org URL:
https://www.mindat.org/min-3740.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Strontiojoaquinite
Localities for Strontiojoaquinite
Showing 4 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.
Japan | |
| Mashima et al (2004) |
USA (TL) | |
| Wise (1982) +4 other references |
| Cooper et al. (2003) +1 other reference | |
| www.benitoitemine.com +1 other reference |
Quick NavTopAbout StrontiojoaquiniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Mina Numero Uno, Picacho Peak, San Benito County, California, USA