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Sulfhydrylbystrite

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Formula:
Na5K2Ca[Al6Si6O24](S5)2(SH)
Colour:
Yellow to orange
Lustre:
Vitreous
Hardness:
4½ - 5
Specific Gravity:
2.391
Crystal System:
Trigonal
Name:
For the presence of sulfhydryl (SH) group and relation to bystrite.
Doubly unique in being the only known mineral with sulhydryl (SH) and the only one with pentasulphide anion at once. First member of the cancrinite group with sulfhydryl and second with dominant polysulphide group after bystrite. Also first mineral for which both these unique anions were structurally detected. For another polysulphide-containing mineral see bazhenovite.

The structure is an ABAC stacking of six-membered rings comprising 23 SiO4 and AlO4 tetrahedra; extra-framework ions are located within structural cages. There are two type of cages - the cancrinite one and the losod one - stacked into chains. The cancrinite cage hosts Ca2+ and SH- ions;(S5)2- anion is associated with Na and K ions in the losod cage.


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Classification of SulfhydrylbystriteHide

Approved
Approval Year:
2015
First Published:
2017

Physical Properties of SulfhydrylbystriteHide

Vitreous
Transparency:
Translucent
Colour:
Yellow to orange
Streak:
Yellow
Hardness:
4½ - 5 on Mohs scale
Hardness:
VHN100=598 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good cleavage on {100}
Parting:
Poor parting on {001}
Fracture:
Conchoidal
Density:
2.391(1) g/cm3 (Measured)    2.368 g/cm3 (Calculated)
Comment:
The density was measured in a thermogradient tube (45 cm long)

Optical Data of SulfhydrylbystriteHide

Type:
Uniaxial (+)
RI values:
nω = 1.661() nε = 1.584(2)
Max Birefringence:
δ = 0.077
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Pleochroism:
Strong
Comments:
Deep yellow or orange to pale yellow.

Chemical Properties of SulfhydrylbystriteHide

Formula:
Na5K2Ca[Al6Si6O24](S5)2(SH)
IMA Formula:
Na5K2Ca[Al6Si6O24](S5)2-(SH)-

Crystallography of SulfhydrylbystriteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
P3 1c
Setting:
P3 1c
Cell Parameters:
a = 12.9567(6) Å, c = 10.7711(5) Å
Ratio:
a:c = 1 : 0.831
Unit Cell V:
1,565.96 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.857(48)
3.948(38)
3.739(94)
3.331(100)
2.715(32)
2.692(56)
2.487(28)
2.156(27)
Comments:
From Type Description.

Type Occurrence of SulfhydrylbystriteHide

General Appearance of Type Material:
Found at margins of lazurite masses and replacing it
Place of Conservation of Type Material:
Type material is deposited in the collections of the Mineralogical Museum of St.-Petersburg State University, 7/9 Universitetskaya nab., Saint-Petersburg, 199034, Russia, catalogue number 1/19636
Geological Setting of Type Material:
Nonequilibrium lazurite-diopside-sulfhydrylbystrite
Associated Minerals at Type Locality:

Synonyms of SulfhydrylbystriteHide

Relationship of Sulfhydrylbystrite to other SpeciesHide

Other Members of this group:
Afghanite(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6Trig. 3m : P3 1c
Alloriite(Na,Ca,K)26Ca4(Al6Si6O24)4(SO4)6Cl6Trig. 3m : P3 1c
Balliranoite(Na,K)6Ca2(Si6Al6O24)Cl2(CO3)Hex. 6 : P63
Biachellaite(Na,Ca,K)8(Al6Si6O24)(SO4)2(OH)0.5 · H2OTrig. 3 : P3
Bystrite(Na,K)7Ca(Al6Si6O24)(S5)ClHex.
Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2OHex. 6 : P63
CancrisiliteNa7(Al5Si7O24)(CO3) · 3H2OHex.
Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2Hex. 6/m : P63/m
DepmeieriteNa8(Al6Si6O24)(PO4,CO3)1-x · 3H2O (x<0.5)Hex. 6 : P63
Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2OHex.
Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2Hex.
HydroxycancriniteNa8(Al6Si6O24)(OH)2 · 2H2OHex.
KircheriteNa5Ca2K(Al6Si6O24)(SO4)2 · 0.33H2OTrig. 3 2 : R3 2
KyanoxaliteNa7(Al6-xSi6+xO24)(C2O4)0.5+x · 5H2O (0 < x < 0.5)Hex. 6 : P63
Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4Hex.
Marinellite(Na,K)42Ca6(Al6Si6O24)6(SO4)8Cl2 · 3H2OTrig. 3m : P3 1c
MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2Hex.
PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2OHex.
Quadridavyne(Na,K)6Ca2(Al6Si6O24)Cl4Hex.
Sacrofanite(Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6•2H2OHex.
Tounkite(Na,Ca,K)8(Al6Si6O24)(SO4)2Cl · H2OHex.
Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2OHex. 6 : P63

Other InformationHide

Notes:
The minerals are unstable even in dilute acids, where it quickly discolours and decomposes under H2S evolution.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for SulfhydrylbystriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sapozhnikov, A.N., Kaneva, E.V., Suvorova, L.F., Levitsky, V.I., Ivanova, L.A., Mitichkin, M.A. and Barash, I.G. (2015) Sulfhydrylbystrite, IMA 2015-010. CNMNC Newsletter No. 25, June 2015, page 534; Mineralogical Magazine, 79, 529-535.
Sapozhnikov, A.N., Kaneva, E.P., Surorova, L.P., Levitsky, V.I., Ivanova, L.A. (2017): Sulfhydrylbystrite, Na5K2Ca(Al6Si6O24)(S5)(SH), a new mineral with the LOS framework, and re-interpretation of bystrite: cancrinite-group minerals with novel extra-framework anions. Mineralogical Magazine: 81: 383–402.

Internet Links for SulfhydrylbystriteHide

Localities for SulfhydrylbystriteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya Oblast'
        • Lake Baikal area
          • Slyudyanka (Sludyanka)
            • Malaya Bystraya River Valley
Sapozhnikov, A.N., Kaneva, E.V., Suvorova, L.F., Levitsky, V.I., Ivanova, L.A., Mitichkin, M.A. and Barash, I.G. (2015) Sulfhydrylbystrite, IMA 2015-010. CNMNC Newsletter No. 25, June 2015, page 534; Mineralogical Magazine, 79, 529-535.
Mineral and/or Locality  
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