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”.

Type Locality:

ⓘ Malo-Bystrinskoe lazurite deposit, Malaya Bystraya River Valley, Slyudyanka, Lake Baikal area, Irkutsk Oblast, Russia

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 SO₄^2– anions and extra-framework cations. The second type contains only neutral molecules (S₆, CO₂, H₂O, and minor S₄).

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Unique IdentifiersHide

Mindat ID:

55752

Long-form identifier:

mindat:1:1:55752:2

GUID
(UUID V4):

9cd9aedb-0ad8-4e7d-b4bc-7091822ec684

IMA Classification of SlyudyankaiteHide

IMA status:

Approved

IMA Formula:

Na₂₈Ca₄(Si₂₄Al₂₄O₉₆)(SO₄)₆(S₆)_1/3(CO₂) · 2H₂O

Classification of SlyudyankaiteHide

Strunz-mindat (2024):

9.FB.

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H₂O
B : Tektosilicates with additional anions

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
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 SlyudyankaiteHide

Lustre:

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 SlyudyankaiteHide

Type:

Biaxial (+)

RI values:

n_α = 1.506(1) n_β = 1.509(1) n_γ = 1.513(1)

2V:

Measured: 80° (10), Calculated: 82°

Max Birefringence:

δ = 0.007

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Low

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 SlyudyankaiteHide

Mindat Formula:

Na₂₈Ca₄(Si₂₄Al₂₄O₉₆)(SO₄)₆(S₆)_1/3(CO₂) · 2H₂O

Elements listed:

Al, C, Ca, H, Na, O, S, Si - search for minerals with similar chemistry

Chemical AnalysisHide

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	Na_27.57Ca_4.05K_0.11(Si_24.52Al_23.48O₉₆)(SO₄)_6.06S_2.42Cl_0.12(CO₂)₁ · ₄₃ · 2.21H₂O

Sample references:

ID	Locality	Reference	Notes
1	Malo-Bystrinskoe lazurite deposit, Malaya Bystraya River Valley, Slyudyanka, Lake Baikal area, Irkutsk Oblast, Russia	SAPOZHNIKOV, ANATOLY N, BOLOTINA, NADEZHDA B, CHUKANOV, NIKITA V, YU, ROMAN, SHENDRIK, EKATERINA V, VIGASINA, MARINA F, IVANOVA, LARISA A, TAUSON, VLADIMIR L, LIPKO, SERGEY V (2023) Slyudyankaite, Na28Ca4 (Si24Al24O96)(SO4) 6 (S6)(CO2)· 2H2O, a new sodalite-group mineral from the Malo-Bystrinskoe lazurite deposit, Baikal Lake area, Russia. 108 (9) 1805-1817	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 SlyudyankaiteHide

Crystal System:

Triclinic

Class (H-M):

1 - Pedial

Space Group:

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)°

Ratio:

a:b:c = 0.703 : 1 : 1.994

Unit Cell V:

2,994.36 Å³ (Calculated from Unit Cell)

Morphology:

Anhedral.

X-Ray Powder DiffractionHide

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 SlyudyankaiteHide

Type Locality:

ⓘ Malo-Bystrinskoe lazurite deposit, Malaya Bystraya River Valley, Slyudyanka, Lake Baikal area, Irkutsk Oblast, Russia

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:

Pyrite	Phlogopite	Lazurite	Fluorapatite	Diopside
Calcite

Synonyms of SlyudyankaiteHide

IMA2021-062a

Relationship of Slyudyankaite to other SpeciesHide

Member of:

Cancrinite Group > Feldspathoid Group

Other Members of this group:

Afghanite	(Na,K)₂₂Ca₁₀(Si₂₄Al₂₄O₉₆)(SO₄)₆Cl₆	Trig. 3m : P3 1c
Alloriite	(Na,Ca,K)₂₆Ca₄(Al₆Si₆O₂₄)₄(SO₄)₆Cl₆	Trig. 3m : P3 1c
Balliranoite	(Na,K)₆Ca₂(Si₆Al₆O₂₄)Cl₂(CO₃)	Hex. 6 : P6₃
Betzite	Na₆Ca₂(Al₆Si₆O₂₄)Cl₄	Hex. 6 : P6₃
Biachellaite	(Na,Ca,K)₈(Al₆Si₆O₂₄)(SO₄)₂(OH)_0.5 · H₂O	Trig. 3 : P3
Bystrite	(Na,K)₇Ca(Al₆Si₆O₂₄)(S₅)Cl	Trig. 3m : P3 1c
Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O	Hex. 6 : P6₃
Cancrisilite	Na₇(Al₅Si₇O₂₄)(CO₃) · 3H₂O	Hex. 6mm : P6₃mc
Carbobystrite	Na₈(Al₆Si₆O₂₄)(CO₃) · 3.5H₂O	Trig. 3m : P3 1c
Davyne	(Na,K)₆Ca₂(Al₆Si₆O₂₄)(Cl₂,SO₄)₂	Hex. 6/m : P6₃/m
Depmeierite	Na₈(Al₆Si₆O₂₄)(PO₄,CO₃)_1-x · 3H₂O (x	Hex. 6 : P6₃
Fantappièite	[Na_82.5Ca₃₃K_16.5](Si₉₉Al₉₉O₃₉₆)(SO₄)₃₃ · 4H₂O	Trig. 3 : R3
Farneseite	(Na,Ca,K)₅₆(Al₆Si₆O₂₄)₇(SO₄)₁₂ · 6H₂O	Hex. 6/m : P6₃/m
Franzinite	(Na,K)₆Ca₂(Al₆Si₆O₂₄)(SO₄)₂ · 0.5H₂O	Hex.
Giuseppettite	(Na,K,Ca)_7-8(Al₆Si₆O₂₄)(SO₄,Cl)_1-2	Trig. 3m : P3 1c
Hydroxycancrinite	Na₈(Al₆Si₆O₂₄)(OH)₂ · 2H₂O	Hex. 6 : P6₃
Kircherite	Na₅Ca₂K(Al₆Si₆O₂₄)(SO₄)₂ · 0.33H₂O	Trig. 3 2 : R3 2
Kyanoxalite	Na₇(Al_6-xSi_6+xO₂₄)(C₂O₄)_0.5+x · 5H₂O (0 < x < 0.5)	Hex. 6 : P6₃
Liottite	(Na,K)₁₆Ca₈(Al₆Si₆O₂₄)₃(SO₄)₅Cl₄	Hex. 6 : P6
Marinellite	(Na,K)₄₂Ca₆(Al₆Si₆O₂₄)₆(SO₄)₈Cl₂ · 3H₂O	Trig. 3m : P3 1c
Microsommite	Na₄K₂Ca₂(Al₆Si₆O₂₄)(SO₄)Cl₂	Hex. 6 2 2 : P6₃ 2 2
Pitiglianoite	Na₆K₂(Al₆Si₆O₂₄)(SO₄) · 2H₂O	Hex. 6 : P6₃
Quadridavyne	(Na,K)₆Ca₂(Al₆Si₆O₂₄)Cl₄	Hex. 6/m : P6₃/m
Sacrofanite	(Na₆₁K₁₉Ca₃₂)(Si₈₄Al₈₄O₃₃₆)(SO₄)₂₆Cl₂F₆ · 2H₂O	Hex.
Steudelite	Na₃(K₁₇Ca₇)Ca₄(Al₂₄Si₂₄O₉₆)(SO₃)₆F₆ · 4H₂O	Hex. 6 m2 : P6₂c
Sulfhydrylbystrite	Na₅K₂Ca[Al₆Si₆O₂₄](S₅)₂(SH)	Trig. 3m : P3 1c
Tounkite	(Na,Ca,K)₈(Al₆Si₆O₂₄)(SO₄)₂Cl · H₂O	Hex. 6 2 2 : P6₂ 2 2
UM2004-48-SiO:AlClCaNaS	(Na,Ca)₈(Si₆Al₆)O₂₄(SO₄)_1.7Cl_1.3
UM2009-23-SiO:AlCCaClHKNaS	(Na,Ca)₂₄K₁₀[(Si,Al)₆₀O₁₂₀](SO₄)_5.6Cl_1.5(CO₃)_0.4 · 11H₂O	Trig. 3 : P3
Vishnevite	(Na,K)₈(Al₆Si₆O₂₄)(SO₄,CO₃) · 2H₂O	Hex. 6 : P6₃

Related Minerals - Strunz-mindat Grouping Hide

9.FB.	Steudelite	Na₃(K₁₇Ca₇)Ca₄(Al₂₄Si₂₄O₉₆)(SO₃)₆F₆ · 4H₂O	Hex. 6 m2 : P6₂c
9.FB.	Sapozhnikovite	Na₈(Al₆Si₆O₂₄)(HS)₂	Iso. 4 3m : P4 3n
9.FB.	Betzite	Na₆Ca₂(Al₆Si₆O₂₄)Cl₄	Hex. 6 : P6₃
9.FB.	Bolotinaite	(Na₇◻)(Al₆Si₆O₂₄)F · 4H₂O	Iso. 4 3m : I4 3m
9.FB.	Wenlanzhangite-(Y)	Y₂V³⁺₂V⁴⁺₂(SiO₄)₂O₄(OH)₄	Tric. 1 : P1
9.FB.05	Afghanite	(Na,K)₂₂Ca₁₀(Si₂₄Al₂₄O₉₆)(SO₄)₆Cl₆	Trig. 3m : P3 1c
9.FB.05	Bystrite	(Na,K)₇Ca(Al₆Si₆O₂₄)(S₅)Cl	Trig. 3m : P3 1c
9.FB.05	Cancrinite	(Na,Ca,◻)₈(Al₆Si₆O₂₄)(CO₃,SO₄)₂ · 2H₂O	Hex. 6 : P6₃
9.FB.05	Cancrisilite	Na₇(Al₅Si₇O₂₄)(CO₃) · 3H₂O	Hex. 6mm : P6₃mc
9.FB.05	Davyne	(Na,K)₆Ca₂(Al₆Si₆O₂₄)(Cl₂,SO₄)₂	Hex. 6/m : P6₃/m
9.FB.05	Franzinite	(Na,K)₆Ca₂(Al₆Si₆O₂₄)(SO₄)₂ · 0.5H₂O	Hex.
9.FB.05	Giuseppettite	(Na,K,Ca)_7-8(Al₆Si₆O₂₄)(SO₄,Cl)_1-2	Trig. 3m : P3 1c
9.FB.05	Hydroxycancrinite	Na₈(Al₆Si₆O₂₄)(OH)₂ · 2H₂O	Hex. 6 : P6₃
9.FB.05	Liottite	(Na,K)₁₆Ca₈(Al₆Si₆O₂₄)₃(SO₄)₅Cl₄	Hex. 6 : P6
9.FB.05	Microsommite	Na₄K₂Ca₂(Al₆Si₆O₂₄)(SO₄)Cl₂	Hex. 6 2 2 : P6₃ 2 2
9.FB.05	Pitiglianoite	Na₆K₂(Al₆Si₆O₂₄)(SO₄) · 2H₂O	Hex. 6 : P6₃
9.FB.05	Quadridavyne	(Na,K)₆Ca₂(Al₆Si₆O₂₄)Cl₄	Hex. 6/m : P6₃/m
9.FB.05	Sacrofanite	(Na₆₁K₁₉Ca₃₂)(Si₈₄Al₈₄O₃₃₆)(SO₄)₂₆Cl₂F₆ · 2H₂O	Hex.
9.FB.05	Tounkite	(Na,Ca,K)₈(Al₆Si₆O₂₄)(SO₄)₂Cl · H₂O	Hex. 6 2 2 : P6₂ 2 2
9.FB.05	Vishnevite	(Na,K)₈(Al₆Si₆O₂₄)(SO₄,CO₃) · 2H₂O	Hex. 6 : P6₃
9.FB.05	Marinellite	(Na,K)₄₂Ca₆(Al₆Si₆O₂₄)₆(SO₄)₈Cl₂ · 3H₂O	Trig. 3m : P3 1c
9.FB.05	Farneseite	(Na,Ca,K)₅₆(Al₆Si₆O₂₄)₇(SO₄)₁₂ · 6H₂O	Hex. 6/m : P6₃/m
9.FB.05	Alloriite	(Na,Ca,K)₂₆Ca₄(Al₆Si₆O₂₄)₄(SO₄)₆Cl₆	Trig. 3m : P3 1c
9.FB.05	Biachellaite	(Na,Ca,K)₈(Al₆Si₆O₂₄)(SO₄)₂(OH)_0.5 · H₂O	Trig. 3 : P3
9.FB.05	Fantappièite	[Na_82.5Ca₃₃K_16.5](Si₉₉Al₉₉O₃₉₆)(SO₄)₃₃ · 4H₂O	Trig. 3 : R3
9.FB.05	Kyanoxalite	Na₇(Al_6-xSi_6+xO₂₄)(C₂O₄)_0.5+x · 5H₂O (0 < x < 0.5)	Hex. 6 : P6₃
9.FB.05	Balliranoite	(Na,K)₆Ca₂(Si₆Al₆O₂₄)Cl₂(CO₃)	Hex. 6 : P6₃
9.FB.05	Carbobystrite	Na₈(Al₆Si₆O₂₄)(CO₃) · 3.5H₂O	Trig. 3m : P3 1c
9.FB.05	Depmeierite	Na₈(Al₆Si₆O₂₄)(PO₄,CO₃)_1-x · 3H₂O (x	Hex. 6 : P6₃
9.FB.05	Kircherite	Na₅Ca₂K(Al₆Si₆O₂₄)(SO₄)₂ · 0.33H₂O	Trig. 3 2 : R3 2
9.FB.05	Sulfhydrylbystrite	Na₅K₂Ca[Al₆Si₆O₂₄](S₅)₂(SH)	Trig. 3m : P3 1c
9.FB.10	Bicchulite	Ca₂(Al₂SiO₆)(OH)₂	Iso. 4 3m : I4 3m
9.FB.10	Danalite	Be₃Fe²⁺₄(SiO₄)₃S	Iso. 4 3m : P4 3n
9.FB.10	Genthelvite	Be₃Zn₄(SiO₄)₃S	Iso. 4 3m : P4 3n
9.FB.10 va	Hackmanite	Na₈Al₆Si₆O₂₄(Cl₂,S)
9.FB.10	Haüyne	Na₃Ca(Si₃Al₃)O₁₂(SO₄)	Iso. 4 3m : P4 3n
9.FB.10	Helvine	Be₃Mn²⁺₄(SiO₄)₃S	Iso. 4 3m : P4 3n
9.FB.10	Kamaishilite	Ca₂(Al₂SiO₆)(OH)₂	Tet.
9.FB.10	Lazurite	Na₇Ca(Al₆Si₆O₂₄)(SO₄)(S₃) · H₂O	Iso. 4 3m : P4 3n
9.FB.10	Nosean	Na₈(Al₆Si₆O₂₄)(SO₄) · H₂O	Iso. 4 3m : P4 3n
9.FB.10	Sodalite	Na₄(Si₃Al₃)O₁₂Cl	Iso. 4 3m : P4 3n
9.FB.10	Tsaregorodtsevite	(N(CH₃)₄)(AlSi₅O₁₂)	Orth. 2 2 2 : I2 2 2
9.FB.10	Tugtupite	Na₄BeAlSi₄O₁₂Cl	Tet. 4 : I4
9.FB.10	Vladimirivanovite	Na₆Ca₂(Al₆Si₆O₂₄)(SO₄,S₃,S₂,Cl)₂ · H₂O	Orth. mmm (2/m 2/m 2/m)
9.FB.15	Marialite	Na₄Al₃Si₉O₂₄Cl	Tet. 4/m : I4/m
9.FB.15	Meionite	Ca₄Al₆Si₆O₂₄CO₃	Tet. 4/m : I4/m
9.FB.15	Silvialite	(Ca,Na)₄(Al₆Si₆O₂₄)(SO₄,CO₃)	Tet. 4/m : I4/m

Fluorescence of SlyudyankaiteHide

In UV light:

Not fluorescent.

Other InformationHide

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 SlyudyankaiteHide

mindat.org URL:

https://www.mindat.org/min-55752.html
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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for SlyudyankaiteHide

Reference List:

Chivers, T. & Oakley, R.T. (2023): Structures and Spectroscopic Properties of Polysulfide Radical Anions: A Theoretical Perspective. Molecules, 28, 5654.

Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 65. European Journal of Mineralogy, 34 (1) 143-148 doi:10.5194/ejm-34-143-2022

SAPOZHNIKOV, ANATOLY N, BOLOTINA, NADEZHDA B, CHUKANOV, NIKITA V, YU, ROMAN, SHENDRIK, EKATERINA V, VIGASINA, MARINA F, IVANOVA, LARISA A, TAUSON, VLADIMIR L, LIPKO, SERGEY V (2023) Slyudyankaite, Na28Ca4 (Si24Al24O96)(SO4) 6 (S6)(CO2)· 2H2O, a new sodalite-group mineral from the Malo-Bystrinskoe lazurite deposit, Baikal Lake area, Russia. 108 (9) 1805-1817

(2023) Slyudyankaite. Handbook of Mineralogy. Mineralogical Society of America

Localities for SlyudyankaiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- 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). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Russia (TL)

Irkutsk Oblast

Lake Baikal area

Slyudyanka

Malaya Bystraya River Valley

ⓘ Malo-Bystrinskoe lazurite deposit (TL)

Miyawaki et al. (2022) +1 other reference

Slyudyankaite

Unique IdentifiersHide

IMA Classification of SlyudyankaiteHide

Classification of SlyudyankaiteHide

Mineral SymbolsHide

Physical Properties of SlyudyankaiteHide

Optical Data of SlyudyankaiteHide

Chemistry of SlyudyankaiteHide

Chemical AnalysisHide

Crystallography of SlyudyankaiteHide

X-Ray Powder DiffractionHide

Type Occurrence of SlyudyankaiteHide

Synonyms of SlyudyankaiteHide

Relationship of Slyudyankaite to other SpeciesHide

Related Minerals - Strunz-mindat GroupingHide

Fluorescence of SlyudyankaiteHide

Other InformationHide

Internet Links for SlyudyankaiteHide

References for SlyudyankaiteHide

Localities for SlyudyankaiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide