Reederite-(Y)
A valid IMA mineral species
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Dr. Richard J. Reeder (c. 2009)
Formula:
(Na,Mn)15Y2(CO3)9(FSO3)Cl
Colour:
Yellow to orange-brown
Lustre:
Vitreous
Hardness:
3 - 3½
Specific Gravity:
2.91
Crystal System:
Hexagonal
Name:
Named in honor of Professor Richard J. Reeder, at the State University of New York at Stony Brook, for his significant contributions to carbonate mineralogy. The suffix/modifier follows the Levinson rule for minerals with essential REE and the predominance of, in this case, yttrium.
Presently, the only known mineral with a fluorosulphate (FSO3)- anion.
Unique Identifiers
Mindat ID:
3381
Long-form identifier:
mindat:1:1:3381:3
Similar Names
| Rodderite | A rock subtype | |
| Roedderite | A valid IMA mineral species | K(◻Na)Mg2Mg3[Si12O30] |
IMA Classification of Reederite-(Y)
Classification of Reederite-(Y)
5.BF.20
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
F : With (Cl), SO4, PO4, TeO3
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
F : With (Cl), SO4, PO4, TeO3
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 |
|---|---|---|
| Rde-Y | 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 Reederite-(Y)
Vitreous
Transparency:
Transparent
Colour:
Yellow to orange-brown
Streak:
White
Hardness:
3 - 3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{001}
{001}
Fracture:
Conchoidal
Density:
2.91 g/cm3 (Measured) 2.85 g/cm3 (Calculated)
Optical Data of Reederite-(Y)
Type:
Uniaxial (-)
RI values:
nω = 1.548 nε = 1.537
Max. Birefringence:
δ = 0.011
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:
None to Very Low
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 uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Pleochroism:
Non-pleochroic
Comments:
Some grains were observed to be biaxial negative with 2V up to 15 deg (type description).
Chemistry of Reederite-(Y)
Mindat Formula:
(Na,Mn)15Y2(CO3)9(FSO3)Cl
Element Weights:
Crystallography of Reederite-(Y)
Crystal System:
Hexagonal
Class (H-M):
6 - Trigonal Dipyramidal
Space Group:
P6
Setting:
P6
Cell Parameters:
a = 8.773 Å, c = 10.746 Å
Ratio:
a:c = 1 : 1.225
Unit Cell V:
716.26 ų (Calculated from Unit Cell)
Z:
1
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) |
|---|---|---|---|---|---|---|---|
| 0001759 | Reederite-(Y) | Grice J D, Gault R A, Chao G Y (1995) Reederite -(Y), a new sodium rare-earth mineral with a unique fluorosulfate anion American Mineralogist 80 1059-1064 |  | 1995 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.20 Å | (40) |
| 4.39 Å | (80) |
| 3.801 Å | (20) |
| 2.872 Å | (20) |
| 2.774 Å | (80) |
| 2.606 Å | (20) |
| 2.532 Å | (100) |
| 2.240 Å | (80) |
| 2.067 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 9 : Lava/xenolith minerals (hornfels, sanidinite facies) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Reederite-(Y)
General Appearance of Type Material:
An inclusion in a vug filled by trona. Irregular tabular to blocky grains up to 2 mm.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada, number 8152 (cotype).
Geological Setting of Type Material:
In a sodalite xenolith in syenite in an alkaline intrusive complex. Probably a late stage hydrothermal mineral.
Associated Minerals at Type Locality:
Synonyms of Reederite-(Y)
Other Language Names for Reederite-(Y)
Related Minerals - Strunz-mindat Grouping
| 5.BF.05 | Northupite | Na3Mg(CO3)2Cl |
| 5.BF.05 | Manganotychite | Na6Mn2(CO3)4(SO4) |
| 5.BF.05 | Tychite | Na6Mg2(CO3)4(SO4) |
| 5.BF.05 | Ferrotychite | Na6(Fe,Mn,Mg)2(CO3)4(SO4) |
| 5.BF.10 | Sidorenkite | Na3Mn2+(CO3)(PO4) |
| 5.BF.10 | Crawfordite | Na3Sr(CO3)(PO4) |
| 5.BF.10 | Bonshtedtite | Na3Fe2+(CO3)(PO4) |
| 5.BF.10 | Bradleyite | Na3Mg(CO3)(PO4) |
| 5.BF.15 | Daqingshanite-(Ce) | (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x |
| 5.BF.25 | Mineevite-(Y) | Na25Ba(Y,Gd,Dy)2(CO3)11(HCO3)4(SO4)2F2Cl |
| 5.BF.30 | Brianyoungite | Zn3(CO3,SO4)(OH)4 |
| 5.BF.35 | Philolithite | Pb12Mn2+(Mg,Mn2+)2(Mn2+,Mg)4(CO3)4(SO4)O6(OH)12Cl4 |
| 5.BF.40 | Leadhillite | Pb4(CO3)2(SO4)(OH)2 |
| 5.BF.40 | Macphersonite | Pb4(CO3)2(SO4)(OH)2 |
| 5.BF.40 | Susannite | Pb4(CO3)2(SO4)(OH)2 |
| 5.BF.45 | Peatite-(Y) | Li4Na12Y12(PO4)12(CO3)4(F,OH)8 |
| 5.BF.50 | Ramikite-(Y) | Li4(Na,Ca)12Y6Zr6(PO4)12(CO3)4O4[(OH),F]4 |
Fluorescence of Reederite-(Y)
Not fluorescent.
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 Reederite-(Y)
mindat.org URL:
https://www.mindat.org/min-3381.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Reederite-(Y)
Localities for Reederite-(Y)
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.
Canada (TL) | |
| Grice et al. (1995) |
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