Reyerite
A valid IMA mineral species - grandfathered
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About Reyerite
Eduard Reyer
Formula:
(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2O
Colour:
Colourless, white
Lustre:
Vitreous, Pearly
Hardness:
3½ - 4½
Specific Gravity:
2.51 - 2.58
Crystal System:
Trigonal
Member of:
Name:
Named in honor of Eduard Reyer (16 May 1849, Salzburg, Austrian Empire - 11 July 1914, Jena, Austria-Hungary), geologist in Vienna, Austria.
Unique Identifiers
Mindat ID:
3396
Long-form identifier:
mindat:1:1:3396:7
Similar Names
| Beyerite | A valid IMA mineral species - grandfathered | Ca(BiO)2(CO3)2 |
| Dreyerite | A valid IMA mineral species | Bi(VO4) |
| Geyerite | A variety of Löllingite | Fe(As,S)2 |
| Regerite | A valid IMA mineral species | KFe6(PO4)4(OH)7(H2O)6 · 4H2O |
IMA Classification of Reyerite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Na2Ca14Al2Si22O58(OH)8·6H2O
Classification of Reyerite
9.EE.35
9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
73.2.2a.1
73 : PHYLLOSILICATES Condensed Tetrahedral Sheets
2 : Condensed Tetrahedral Sheets with double and single layers
73 : PHYLLOSILICATES Condensed Tetrahedral Sheets
2 : Condensed Tetrahedral Sheets with double and single layers
16.10.16
16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis
16 : Silicates Containing Aluminum and other Metals
10 : Aluminosilicates of Ca and alkalis
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 |
|---|---|---|
| Rey | 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 Reyerite
Vitreous, Pearly
Transparency:
Transparent, Translucent
Colour:
Colourless, white
Comment:
pale green with chlorite inclusions
Hardness:
3½ - 4½ on Mohs scale
Cleavage:
Perfect
{0001}
{0001}
Density:
2.51 - 2.58 g/cm3 (Measured) 2.59 g/cm3 (Calculated)
Optical Data of Reyerite
Type:
Uniaxial (-)
RI values:
nω = 1.563 - 1.568 nε = 1.558 - 1.563
Max. Birefringence:
δ = 0.005
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 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.
Chemistry of Reyerite
Mindat Formula:
(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2O
Element Weights:
Crystallography of Reyerite
Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
P3
Cell Parameters:
a = 9.767 Å, c = 19.067 Å
Ratio:
a:c = 1 : 1.952
Unit Cell V:
1,575.20 ų (Calculated from Unit Cell)
Z:
1
Morphology:
radiating aggregates of thin hexagonal plates. Massive, and intergrown with chlorite
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0014486 | Reyerite | Merlino S (1988) The structure of reyerite, (Na,K)2Ca14Si22Al2O58(OH)8*6H2O Mineralogical Magazine 52 247-256 |  | 1988 | Niakornak, Greenland | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.17 Å | (vs) |
| 2.855 Å | (s) |
| 2.659 Å | (s) |
| 1.846 Å | (s) |
| 4.23 Å | (ms) |
| 3.52 Å | (m) |
| 3.035 Å | (m) |
Comments:
can resemble gyrolite or truscottite.
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 5: Initiation of plate tectonics | <3.5-2.5 |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Reyerite
Place of Conservation of Type Material:
University of Copenhagen, Copenhagen, Denmark.
Synonyms of Reyerite
Other Language Names for Reyerite
Relationship of Reyerite to other Species
Member of:
Other Members of Reyerite Group:
| Kodamaite | Na3(Ca5Na)Si16O36(OH)4F2 · (14-x)H2O | Tric. 1 : P1 |
| Minehillite | (K,Na)2-3Ca28Zn4Al4Si40O112(OH)16 | Hex. |
| Truscottite | (Ca,Mn)14Si24O58(OH)8 · 2H2O | Trig. |
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.EE. | Cairncrossite | Sr2Ca7-xNa2x(Si4O10)4(OH)2(H2O)15-x |
| 9.EE.05 | Bementite | Mn7Si6O15(OH)8 |
| 9.EE.07 | Innsbruckite | Mn33(Si2O5)14(OH)38 |
| 9.EE.10 | 'Brokenhillite' | Mn8Si6O15(OH)10 |
| 9.EE.10 | Mcgillite | (Mn,Fe)8Si6O15(OH)8Cl2 |
| 9.EE.10 | Friedelite | Mn2+8Si6O15(OH,Cl)10 |
| 9.EE.10 | Pyrosmalite-(Mn) | Mn2+8Si6O15(OH,Cl)10 |
| 9.EE.10 | Pyrosmalite-(Fe) | Fe2+8Si6O15(OH,Cl)10 |
| 9.EE.15 | Nelenite | Mn2+16As3+3Si12O36(OH)17 |
| 9.EE.15 | Schallerite | Mn2+16As3Si12O36(OH)17 |
| 9.EE.20 | Palygorskite | ◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O |
| 9.EE.20 | Yofortierite | Mn2+Mn2+2Mn2+2◻2Si8O20(OH)2(H2O)4 · 4H2O |
| 9.EE.20 | Windhoekite | Fe3+(Fe3+1.67◻0.33)Ca2◻2Si8O20(OH)2(H2O)4(OH)2 · 6H2O |
| 9.EE.20 | Windmountainite | ◻Fe3+2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2O |
| 9.EE.20 | Ikorskyite | KMn3+(Si4O10) · 3H2O |
| 9.EE.20 | Tuperssuatsiaite | Fe3+Fe3+2(Na◻)◻2Si8O20(OH)2(H2O)4 · 2H2O |
| 9.EE.20 | 'Unnamed (Na-Ca-Fe-Silicate-Hydrate)' | NaCa(Fe2+,Al,Mn)5[Si8O19(OH)](OH)7 · 5H2O |
| 9.EE.25 | Sepiolite | Mg4(Si6O15)(OH)2 · 6H2O |
| 9.EE.25 | Loughlinite | Na2Mg3Si6O16 · 8H2O |
| 9.EE.25 | Falcondoite | (Ni,Mg)4Si6O15(OH)2 · 6H2O |
| 9.EE.25 | Kalifersite | (K,Na)5Fe3+7Si20O50(OH)6 · 12H2O |
| 9.EE.30 | Orlymanite | Ca4Mn3Si8O20(OH)6 · 2H2O |
| 9.EE.30 | Tungusite | Ca4Fe2Si6O15(OH)6 |
| 9.EE.30 | Gyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| 9.EE.35 | Kodamaite | Na3(Ca5Na)Si16O36(OH)4F2 · (14-x)H2O |
| 9.EE.35 | Truscottite | (Ca,Mn)14Si24O58(OH)8 · 2H2O |
| 9.EE.40 | Natrosilite | Na2Si2O5 |
| 9.EE.45 | Makatite | Na2Si4O8(OH)2 · 4H2O |
| 9.EE.50 | Varennesite | Na8Mn2Si10O25(OH,Cl)2 · 12H2O |
| 9.EE.55 | Raite | Mn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6 |
| 9.EE.60 | Intersilite | Na6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2O |
| 9.EE.65 | Zakharovite | Na4Mn5Si10O24(OH)6 · 6H2O |
| 9.EE.65 | Shafranovskite | Na3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2O |
| 9.EE.70 | Zeophyllite | Ca13Si10O28(OH)2F8 · 6H2O |
| 9.EE.75 | Minehillite | (K,Na)2-3Ca28Zn4Al4Si40O112(OH)16 |
| 9.EE.80 | Fedorite | (Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2O |
| 9.EE.80 | Martinite | (Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2 · 4H2O |
| 9.EE.80 | Ellingsenite | Na5Ca6Si18O38(OH)13 · 6H2O |
| 9.EE.85 | Lalondeite | (Na,Ca)6(Ca,Na)3Si16O38(F,OH)2 · 3H2O |
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 Reyerite
mindat.org URL:
https://www.mindat.org/min-3396.html
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Please feel free to link to this page.
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References for Reyerite
Reference List:
Meyer, J. W., Jaunarajs, K. L. (1961) Synthesis and crystal chemistry of gyrolite and reyerite. American Mineralogist, 46 (7-8) 913-933
Chalmers, R. A., Farmer, V. C., Harker, R. I., Kelly, S., Taylor, H. F. W. (1964) Reyerite. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (265) 821-840 doi:10.1180/minmag.1964.033.265.01
Cann, J. R. (1965) Gyrolite and reyerite from ’S Airde Beinn, northern Mull. Mineralogical Magazine and Journal of the Mineralogical Society, 35 (269) 1-4 doi:10.1180/minmag.1965.035.269.03
Clement, Stephen C., Ribbe, and Paul H. (1973) New locality, formula, and proposed structure for reyerite. American Mineralogist, 58 (5-6) 517-522
Gard, J. A., Mitsuda, T., Taylor, H. F. W. (1975) Some observations on Assarsson's Z-phase and its structural relations to gyrolite, truscottite, and reyerite. Mineralogical Magazine, 40 (312) 325-333 doi:10.1180/minmag.1975.040.312.01
Lachowski, E. E., Murray, L. W., Taylor, H. F. W. (1979) Truscottite: composition and ionic substitutions. Mineralogical Magazine, 43 (327) 333-336 doi:10.1180/minmag.1979.043.327.03
Livingstone, A. (1988) Reyerite, Tobermorite, Calcian Analcime and Bytownite from Amygdales in a Skye Basalt. Mineralogical Magazine, 52 (368) 711-713 doi:10.1180/minmag.1988.052.368.18
Localities for Reyerite
Showing 11 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.
France | |
| André Melle (4-2010) | |
Greenland (TL) | |
| Cornu F. & Himmelbauer (1906) +1 other reference |
Iceland | |
| Kristmannsdottir et al. (1978) |
Italy | |
| Cavarretta et al. (1987) |
Poland | |
| Ł. Kruszewski EPMA/PXRD data +1 other reference |
UK | |
| Cann (1965) +1 other reference |
| [Specimen in the Natural History Museum | |
| Livingstone (1988) |
| Sorrell (n.d.) |
USA | |
| Kenny Gay message 15.09.2005 . ... |
| Clement et al. (1973) +1 other reference |
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