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Strontiodresserite
A valid IMA mineral species
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About Strontiodresserite
Formula:
SrAl2(CO3)2(OH)4 · H2O
Colour:
White
Lustre:
Vitreous, Silky
Hardness:
2 - 3
Specific Gravity:
2.71
Crystal System:
Orthorhombic
Member of:
Name:
Named in 1977 by John Leslie Jambor, Ann Phyllis Sabina Stenson, Andrew C. Roberts, and Bozidar Darko Sturman as the strontium analogue of dresserite.
Type Locality:
Isostructural with:
This page provides mineralogical data about Strontiodresserite.
Unique Identifiers
Mindat ID:
3774
Long-form identifier:
mindat:1:1:3774:3
IMA Classification of Strontiodresserite
Approved
IMA Formula:
SrAl2(CO3)2(OH)4·H2O
Approval year:
1977
Classification of Strontiodresserite
5.DB.10
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
16b.2.1.3
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
2 : AmBn(XO3)pZqxH2O & with (m+n):p = 3:2
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
2 : AmBn(XO3)pZq
11.7.14
11 : Carbonates
7 : Carbonates of Al
11 : Carbonates
7 : Carbonates of Al
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 |
|---|---|---|
| Sdrs | 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 Strontiodresserite
Vitreous, Silky
Transparency:
Transparent, Translucent
Colour:
White
Streak:
White
Hardness:
2 - 3 on Mohs scale
Density:
2.71 g/cm3 (Measured) 2.73 g/cm3 (Calculated)
Optical Data of Strontiodresserite
Type:
Biaxial (-)
RI values:
nα = 1.510(4) nβ = 1.583(2) nγ = 1.595(4)
2V:
Measured: 42° , Calculated: 42°
Max. Birefringence:
δ = 0.085
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:
Low (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:
none
Comments:
Y ∥ elongation; X ⊥ elongation and in the plane of flattening.
Chemistry of Strontiodresserite
Mindat Formula:
SrAl2(CO3)2(OH)4 · H2O
Element Weights:
Crystallography of Strontiodresserite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 9.168(4) Å, b = 16.037(6) Å, c = 5.598(3) Å
Ratio:
a:b:c = 0.572 : 1 : 0.349
Unit Cell V:
823.06 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space Group: [P bnm] (by analogy to dundasite).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.97 Å | (10) |
| 3.021 Å | (8) |
| 6.04 Å | (7) |
| 2.648 Å | (6) |
| 2.052 Å | (6) |
| 1.738 Å | (6) |
| 4.41 Å | (5) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Strontiodresserite
General Appearance of Type Material:
Sparse coatings on quartz. Atoll-shaped rings up to 3 mm in diameter. Silky aggregates of white laths with dimensions 0.1x0.01x0.001 mm, arranged radially.
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, 13704; Royal Ontario Museum, Toronto, Canada, M34626, M34627.
Geological Setting of Type Material:
Silicocarbonatite sill.
Associated Minerals at Type Locality:
Synonyms of Strontiodresserite
Other Language Names for Strontiodresserite
Relationship of Strontiodresserite to other Species
Member of:
Other Members of Dresserite Group:
| Alumohydrocalcite | CaAl2(CO3)2(OH)4 · 4H2O | Tric. 1 : P1 |
| Dresserite | BaAl2(CO3)2(OH)4 · H2O | Orth. mmm(2/m2/m2/m) |
| Dundasite | PbAl2(CO3)2(OH)4 · H2O | Orth. mmm(2/m2/m2/m) |
| Grguricite | CaCr2(CO3)2(OH)4 · 4H2O | Tric. 1 : P1 |
| Hydrodresserite | BaAl2(CO3)2(OH)4 · 3H2O | Tric. 1 : P1 |
| Kochsándorite | CaAl2(CO3)2(OH)4 · H2O | Orth. mmm(2/m2/m2/m) : Pnma |
| Petterdite | PbCr3+2(CO3)2(OH)4 · H2O | Orth. mmm(2/m2/m2/m) |
| 'Unnamed (Ca-analogue of Petterdite)' | CaCr3+2(CO3)2(OH)4 · H2O |
Common Associates
Associations Based on Photo Data:
| 5 photos of Strontiodresserite associated with Quartz | SiO2 |
| 5 photos of Strontiodresserite associated with Montroyalite | Sr4Al8(CO3)3(OH,F)26 · 10-11H2O |
| 4 photos of Strontiodresserite associated with Nannoniite | Al2(OH)5F |
| 3 photos of Strontiodresserite associated with Cryolite | Na2NaAlF6 |
| 3 photos of Strontiodresserite associated with Fluorite | CaF2 |
| 2 photos of Strontiodresserite associated with Celestine | SrSO4 |
| 2 photos of Strontiodresserite associated with Albite | Na(AlSi3O8) |
| 2 photos of Strontiodresserite associated with Halloysite | Al2Si2O5(OH)4 · n(H2O) |
| 2 photos of Strontiodresserite associated with Kaolinite | Al2(Si2O5)(OH)4 |
| 1 photo of Strontiodresserite associated with Baryte | BaSO4 |
Related Minerals - Strunz-mindat Grouping
| 5.DB. | Rigrahamite | Na2Ca2Th2(CO3)4(HCO3)2(OH)4(H2O)7 |
| 5.DB. | Grguricite | CaCr2(CO3)2(OH)4 · 4H2O |
| 5.DB.05 | Para-alumohydrocalcite | CaAl2(CO3)2(OH)4 · 6H2O |
| 5.DB.05 | Nasledovite | PbMn3Al4(CO3)4(SO4)O5 · 5H2O |
| 5.DB.05 | 'UM1977-02-CO:AlCaH' | Ca6Al2(CO3)3O6 · 32H2O |
| 5.DB.05 | Alumohydrocalcite | CaAl2(CO3)2(OH)4 · 4H2O |
| 5.DB.10 | Kochsándorite | CaAl2(CO3)2(OH)4 · H2O |
| 5.DB.10 | Dresserite | BaAl2(CO3)2(OH)4 · H2O |
| 5.DB.10 | Dundasite | PbAl2(CO3)2(OH)4 · H2O |
| 5.DB.10 | 'Unnamed (Ca-analogue of Petterdite)' | CaCr3+2(CO3)2(OH)4 · H2O |
| 5.DB.10 | Petterdite | PbCr3+2(CO3)2(OH)4 · H2O |
| 5.DB.10 | Montroyalite | Sr4Al8(CO3)3(OH,F)26 · 10-11H2O |
| 5.DB.15 | Hydrodresserite | BaAl2(CO3)2(OH)4 · 3H2O |
| 5.DB.20 | Schuilingite-(Nd) | PbCu(Nd,Gd,Sm,Y)(CO3)3(OH) · 1.5H2O |
| 5.DB.25 | Sergeevite | Ca2Mg11(CO3)9(HCO3)4(OH)4 · 6H2O |
| 5.DB.30 | Szymańskiite | [H3O]+8[Hg2]2+8(Ni,Mg)6[CO3]12(OH)12 · 3H2O |
| 5.DB.35 | Lusernaite-(Y) | Y4Al(CO3)2(OH)10F · 6H2O |
| 5.DB.40 | Putnisite | SrCa4Cr3+8(CO3)8SO4(OH)16 · 23H2O |
Other Information
Notes:
Effervesces in dilute HCl.
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 Strontiodresserite
mindat.org URL:
https://www.mindat.org/min-3774.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Strontiodresserite
Localities for Strontiodresserite
Showing 5 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.
Austria | |
| Prasnik et al. (2010) |
Canada (TL) | |
| 176-178. +3 other references |
France | |
| • Martin et al. (2004) |
Norway | |
| Tomas Husdal - collection |
Russia | |
| Vladykin et al. (2018) |
Quick NavTopAbout StrontiodresseriteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Condorcet, Nyons, Drôme, Auvergne-Rhône-Alpes, France