Slyudyankaite
A valid IMA mineral species
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About Slyudyankaite
Formula:
Na28Ca4(Si24Al24O96)(SO4)6(S6)1/3(CO2) · 2H2O
Colour:
Green to pale blue
Lustre:
Vitreous
Hardness:
5½
Specific Gravity:
2.46
Crystal System:
Triclinic
Member of:
Name:
After the area of the famous Slyudyanka geological site/quarry, Russia, the type locality. The species was earlier referred to as earlier described as “triclinic lazurite”.
A very unique mineral: the first species with the hexasulfur moiety (likely not a hexasulfide, as the moiety is neutral). One of very few minerals bearing CO2 in their structure.
The structure contains two types of sodalite cages in a ratio of 3:1. The first type contains only SO42– anions and extra-framework cations. The second type contains only neutral molecules (S6, CO2, H2O, and minor S4).
The structure contains two types of sodalite cages in a ratio of 3:1. The first type contains only SO42– anions and extra-framework cations. The second type contains only neutral molecules (S6, CO2, H2O, and minor S4).
Unique Identifiers
Mindat ID:
55752
Long-form identifier:
mindat:1:1:55752:2
IMA Classification of Slyudyankaite
Classification of Slyudyankaite
9.FB.
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
B : Tektosilicates with additional anions
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
B : Tektosilicates with additional anions
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 |
|---|---|---|
| Sdy | 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 Slyudyankaite
Vitreous
Colour:
Green to pale blue
Streak:
White
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
None observed.
Fracture:
Irregular/Uneven
Density:
2.46(2) g/cm3 (Measured) 2.454 g/cm3 (Calculated)
Comment:
Measured in heavy liquids. Calculated using the empirical formula.
Optical Data of Slyudyankaite
Type:
Biaxial (+)
RI values:
nα = 1.506(1) nβ = 1.509(1) nγ = 1.513(1)
2V:
Measured: 80° (10), Calculated: 82°
Max. Birefringence:
δ = 0.007
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:
Moderate
Dispersion:
Distinct.
Optical Extinction:
Orientation could not be determined because of the absence of cleavage and crystal forms.
Pleochroism:
Strong
Comments:
X = colorless; Y = green; Z = greenish-blue.
Comments:
Absorption: X < Y < Z.
Chemistry of Slyudyankaite
Mindat Formula:
Na28Ca4(Si24Al24O96)(SO4)6(S6)1/3(CO2) · 2H2O
Element Weights:
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| Na2O | 19.28 % |
| K2O | 0.12 % |
| CaO | 5.13 % |
| Al2O3 | 27.01 % |
| SiO2 | 33.25 % |
| SO3 | 10.94 % |
| S | 1.75 % |
| Cl | 0.10 % |
| CO2 | 1.42 % |
| H2O | 0.90 % |
| –O?(Cl,HS) | -0.03 % |
| total | 99.87 % |
| Total: | 199.74 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | Na27.57Ca4.05K0.11(Si24.52Al23.48O96)(SO4)6.06S02.42Cl0.12(CO2)1 · 43 · 2.21H2O |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Malo-Bystrinskoe lazurite deposit, Malaya Bystraya River Valley, Slyudyansky District, Irkutsk Oblast, Russia | via (1) electron microprobe; (2) H2O and CO2 via selective sorption of ignition products; (3) CO2 confirmed via quantitative IR spectroscopy; (4) sulfate sulfur determined via wet chemical analysis; "S0" = total sulfide sulfur (mainly neutral S6 and minor S4 molecules) |
Crystallography of Slyudyankaite
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 9.0523(4) Å, b = 12.8806(6) Å, c = 25.681(1) Å
α = 89.988(2)°, β = 90.052(1)°, γ = 90.221(1)°
α = 89.988(2)°, β = 90.052(1)°, γ = 90.221(1)°
Ratio:
a:b:c = 0.703 : 1 : 1.994
Unit Cell V:
2,994.36 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Anhedral.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.45 Å | (11) |
| 3.716 Å | (100) |
| 2.878 Å | (12) |
| 2.625 Å | (23) |
| 2.431 Å | (6) |
| 2.275 Å | (6) |
| 2.143 Å | (12) |
| 1.784 Å | (7) |
Comments:
Malo-Bystrinskoe lazurite deposit, Baikal Lake area, Russia. The data are from the type description.
Type Occurrence of Slyudyankaite
General Appearance of Type Material:
Green to pale blue isolated anhedral equant grains up to 0.5 cm across and their aggregates.
Place of Conservation of Type Material:
Collections of the Sidorov Mineralogical Museum (INRTU), Lermontova St. 83, Irkutsk 664074, Russia, registration numbers MMU/MF27296 (holotype) and MMU/MF 27297 (cotype).
Geological Setting of Type Material:
Altered lazurite-bearing metasomatic rock.
Associated Minerals at Type Locality:
Synonyms of Slyudyankaite
Other Language Names for Slyudyankaite
Dutch:Slyudyankaiet
German:Slyudyankait
Relationship of Slyudyankaite to other Species
Member of:
Other Members of Sodalite Group:
| Bolotinaite | (Na7◻)(Al6Si6O24)F · 4H2O | Iso. 43m : I43m |
| Haüyne | Na3Ca(Si3Al3)O12(SO4) | Iso. 43m : P43n |
| Lazurite | Na7Ca(Al6Si6O24)(SO4)(S3) · H2O | Iso. 43m : P43n |
| Nosean | Na8(Al6Si6O24)(SO4) · H2O | Iso. 43m : P43n |
| Sapozhnikovite | Na8(Al6Si6O24)(HS)2 | Iso. 43m : P43n |
| Sodalite | Na4(Si3Al3)O12Cl | Iso. 43m : P43n |
| Tsaregorodtsevite | (N(CH3)4)(AlSi5O12) | Orth. 222 : I222 |
| Vladimirivanovite | Na6Ca2(Al6Si6O24)(SO4,S3,S2,Cl)2 · H2O | Orth. mmm(2/m2/m2/m) |
Related Minerals - Strunz-mindat Grouping
| 9.FB. | Perchukite-(Y) | PbYAsSi2O8 |
| 9.FB. | Åsgruvanite-(Ce) | Ce16Ca5Al(SiO4)6(AsO3)8(CO3)2Cl4F3(OH)2 |
| 9.FB. | Steudelite | Na3(K17Ca7)Ca4(Al24Si24O96)(SO3)6F6 · 4H2O |
| 9.FB. | Wenlanzhangite-(Y) | Y2V3+2V4+2(SiO4)2O4(OH)4 |
| 9.FB. | Bolotinaite | (Na7◻)(Al6Si6O24)F · 4H2O |
| 9.FB. | Sapozhnikovite | Na8(Al6Si6O24)(HS)2 |
| 9.FB. | Betzite | Na6Ca2(Al6Si6O24)Cl4 |
| 9.FB.05 | Quadridavyne | (Na,K)6Ca2(Al6Si6O24)Cl4 |
| 9.FB.05 | Sulfhydrylbystrite | Na5K2Ca[Al6Si6O24](S5)2(SH) |
| 9.FB.05 | Marinellite | (Na,K)42Ca6(Al6Si6O24)6(SO4)8Cl2 · 3H2O |
| 9.FB.05 | Afghanite | (Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6 |
| 9.FB.05 | Bystrite | (Na,K)7Ca(Al6Si6O24)(S5)Cl |
| 9.FB.05 | Franzinite | (Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2O |
| 9.FB.05 | Kyanoxalite | Na7(Al6-xSi6+xO24)(C2O4)0.5+x · 5H2O (0 < x < 0.5) |
| 9.FB.05 | Vishnevite | (Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2O |
| 9.FB.05 | Farneseite | (Na,Ca,K)56(Al6Si6O24)7(SO4)12 · 6H2O |
| 9.FB.05 | Alloriite | (Na,Ca,K)26Ca4(Al6Si6O24)4(SO4)6Cl6 |
| 9.FB.05 | Liottite | (Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4 |
| 9.FB.05 | Depmeierite | Na8(Al6Si6O24)(PO4,CO3)1-x · 3H2O (x<0.5) |
| 9.FB.05 | Biachellaite | (Na,Ca,K)8(Al6Si6O24)(SO4)2(OH)0.5 · H2O |
| 9.FB.05 | Cancrinite | (Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O |
| 9.FB.05 | Cancrisilite | Na7(Al5Si7O24)(CO3) · 3H2O |
| 9.FB.05 | Fantappièite | [Na82.5Ca33K16.5](Si99Al99O396)(SO4)33 · 4H2O |
| 9.FB.05 | Carbobystrite | Na8(Al6Si6O24)(CO3) · 3.5H2O |
| 9.FB.05 | Microsommite | Na4K2Ca2(Al6Si6O24)(SO4)Cl2 |
| 9.FB.05 | Pitiglianoite | Na6K2(Al6Si6O24)(SO4) · 2H2O |
| 9.FB.05 | Tounkite | (Na,Ca,K)8(Si6Al6)O24(SO4)2Cl · 0.5H2O |
| 9.FB.05 | Balliranoite | (Na,K)6Ca2(Si6Al6O24)Cl2(CO3) |
| 9.FB.05 | Giuseppettite | (Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2 |
| 9.FB.05 | Sacrofanite | (Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6 · 2H2O |
| 9.FB.05 | Kircherite | Na5Ca2K(Al6Si6O24)(SO4)2 · 0.33H2O |
| 9.FB.05 | Hydroxycancrinite | Na8(Al6Si6O24)(OH)2 · 2H2O |
| 9.FB.05 | Davyne | (Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2 |
| 9.FB.10 | Haüyne | Na3Ca(Si3Al3)O12(SO4) |
| 9.FB.10 | Lazurite | Na7Ca(Al6Si6O24)(SO4)(S3) · H2O |
| 9.FB.10 | Danalite | Be3Fe2+4(SiO4)3S |
| 9.FB.10 | Helvine | Be3Mn2+4(SiO4)3S |
| 9.FB.10 | Kamaishilite | Ca2(Al2SiO6)(OH)2 |
| 9.FB.10 | Sodalite | Na4(Si3Al3)O12Cl |
| 9.FB.10 | Nosean | Na8(Al6Si6O24)(SO4) · H2O |
| 9.FB.10 | Genthelvite | Be3Zn4(SiO4)3S |
| 9.FB.10 | Bicchulite | Ca2(Al2SiO6)(OH)2 |
| 9.FB.10 | Tsaregorodtsevite | (N(CH3)4)(AlSi5O12) |
| 9.FB.10 | Vladimirivanovite | Na6Ca2(Al6Si6O24)(SO4,S3,S2,Cl)2 · H2O |
| 9.FB.10 | Tugtupite | (BeAlSi)Na4(SiO4)3Cl |
| 9.FB.15 | Marialite | Na4Al3Si9O24Cl |
| 9.FB.15 | Meionite | Ca4Al6Si6O24CO3 |
| 9.FB.15 | Silvialite | (Ca,Na)4(Al6Si6O24)(SO4,CO3) |
Fluorescence of Slyudyankaite
Not fluorescent.
Other Information
Notes:
The type description provides data for IR, Raman, ESR, near infrared (NIR), visible (Vis) and ultraviolet (UV) absorption, XPS and photoluminescence spectroscopy.
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 Slyudyankaite
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https://www.mindat.org/min-55752.html
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References for Slyudyankaite
Localities for Slyudyankaite
Showing 1 localities.
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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.
Russia (TL) | |
| Miyawaki et al. (2022) +1 other reference |
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Malo-Bystrinskoe lazurite deposit, Malaya Bystraya River Valley, Slyudyansky District, Irkutsk Oblast, Russia