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Gismondine-Sr

A valid IMA mineral species
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05173220017272039337942.jpg
Gismondine-Sr, etc.

Xenolith CS-020, Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
09129530017272434636073.jpg
Gismondine-Sr

Xenolith CS-020, Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
02881900017361052914746.jpg
Gismondine-Sr, etc.

Paralava outcrops, Wadi Halamish, Hatrurim Basin, Tamar Regional Council, Beersheba Subdistrict, Southern District, Israel
05173220017272039337942.jpg
Gismondine-Sr, etc.

Xenolith CS-020, Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
08798810017272434588159.jpg
Gismondine-Sr

Xenolith CS-020, Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
02881900017361052914746.jpg
Gismondine-Sr, etc.

Paralava outcrops, Wadi Halamish, Hatrurim Basin, Tamar Regional Council, Beersheba Subdistrict, Southern District, Israel
05173220017272039337942.jpg
Gismondine-Sr, etc.

Xenolith CS-020, Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
09129530017272434636073.jpg
Gismondine-Sr

Xenolith CS-020, Seekante, Mayen, Mayen-Koblenz, Rhineland-Palatinate, Germany
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About Gismondine-SrHide

07523510017271923424476.jpg
Carlo Giuseppe Gismondi (1762-1824)
Formula:
Sr4(Si8Al8O32) · 9H2O
Colour:
White
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.301 (Calculated)
Crystal System:
Orthorhombic
Name:
Named for being the strontium analogue of gismondine-Ca. The root name relates to Carlo Giuseppe Gismondi (1762-1824), Italian mineralogist, who previously discovered a mixture of gismondine-Ca and phillipsite. The suffix/modifier follows the naming convention for zeolites and denotes the dominant extra-framework cation.
The Sr analogue of gismondine-Ca. GIS-type framework.


Unique IdentifiersHide

Mindat ID:
55600
Long-form identifier:
mindat:1:1:55600:0

IMA Classification of Gismondine-SrHide

Classification of Gismondine-SrHide

Strunz-mindat (2026):
9.GC.

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered rings

Mineral SymbolsHide

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

SymbolSourceReference for Standard
Gis-SrIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of Gismondine-SrHide

Lustre:
Vitreous
Transparency:
Transparent, Translucent
Colour:
White
Streak:
White
Hardness:
4 on Mohs scale
Hardness:
VHN25=302(8) kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
Imperfect on [101].
Fracture:
Irregular/Uneven
Density:
2.301 g/cm3 (Calculated)
Comment:
Could not be measured due to a microcracks and a high degree of hydration.

Optical Data of Gismondine-SrHide

Type:
Biaxial (-)
RI values:
nα = 1.488(3) nβ = 1.492(3) nγ = 1.495(3)
2V:
Measured: 70° to 80°, Calculated: 81.8°
Max. Birefringence:
δ = 0.007
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.

Surface Relief:
Moderate (negative)
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 biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.

Chemistry of Gismondine-SrHide

Mindat Formula:
Sr4(Si8Al8O32) · 9H2O
Element Weights:
Element% weight
O44.772 %
Sr23.921 %
Si15.335 %
Al14.733 %
H1.238 %

Calculated from ideal end-member formula.
O
Sr
Si
Al
H
Elements listed:
Al, H, O, Si, Sr - search for minerals with similar chemistry

Chemical AnalysisHide

Crystallography of Gismondine-SrHide

Crystal System:
Orthorhombic
Class (H-M):
222 - Disphenoidal
Space Group:
C2221
Cell Parameters:
a = 14.0256(2) Å, b = 10.4590(1) Å, c = 13.7936(1) Å
Ratio:
a:b:c = 1.341 : 1 : 1.319
Unit Cell V:
2,023.43 ų (Calculated from Unit Cell)
Comment:
the space group is B2212 for comparison to gismondine-Ca

X-Ray Powder DiffractionHide

Type Occurrence of Gismondine-SrHide

Type Locality:
ⓘ Paralava outcrops, Wadi Halamish, Hatrurim Basin, Tamar Regional Council, Beersheba Subdistrict, Southern District, Israel
General Appearance of Type Material:
Spherical aggregates to 180 μm or pseudotetragonal bipyramids to 50 μm.
Place of Conservation of Type Material:
Collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration no. 5708/1.
Geological Setting of Type Material:
Gehlenite hornfels.
Associated Minerals at Type Locality:
AnalcimeFlörkeiteGismondine-CaThomsonite-CaTobermorite
Reference:
Skrzyńska, Katarzyna, Cametti, Georgia, Galuskina, Irina O., Vapnik, Yevgeny, Galuskin, Evgeny V. (2023) Gismondine-Sr, Sr4(Al8Si8O32)·9H2O, a new strontium dominant, orthorhombic zeolite of the gismondine series from the Hatrurim Complex, Israel. American Mineralogist, 108 (2) 249-258 doi:10.2138/am-2022-8376

Synonyms of Gismondine-SrHide

Other Language Names for Gismondine-SrHide

Relationship of Gismondine-Sr to other SpeciesHide

Member of:
Gismondine Subgroup > Zeolite Group
Other Members of Gismondine Subgroup:
'Gismondine-Ba'Ba2Al4Si4O16 · 4-6H2O
Gismondine-CaCaAl2Si2O8 · 4H2OMon. 2/m : P21/b

Common AssociatesHide

Associations Based on Photo Data:
3 photos of Gismondine-Sr associated with Flörkeite(K3Ca2Na)[Al8Si8O32] · 12H2O
2 photos of Gismondine-Sr associated with Gismondine-CaCaAl2Si2O8 · 4H2O

Related Minerals - Strunz-mindat GroupingHide

9.GC.Garronite-NaNa6(Al6Si10O32) · 8.5H2OMon. 2
9.GC.05'Gismondine-Ba'Ba2Al4Si4O16 · 4-6H2O
9.GC.05Garronite-CaNa2Ca5Al12Si20O64 · 27H2OTet. 42m : I4m2
9.GC.05Gismondine-CaCaAl2Si2O8 · 4H2OMon. 2/m : P21/b
9.GC.05GobbinsiteNa5(Si11Al5)O32 · 11H2OOrth. mmm(2/m2/m2/m) : Pnma
9.GC.05AmiciteK2Na2Al4Si4O16 · 5H2OMon. 2
9.GC.10MartinandresiteBa2(Al4Si12O32) · 10H2OOrth. mmm(2/m2/m2/m) : Pmmn
9.GC.10HarmotomeBa2(Si12Al4)O32 · 12H2OMon. 2/m : P21/m
9.GC.10Phillipsite-CaCa3(Si10Al6)O32 · 12H2OMon. 2/m : P21/m
9.GC.10Phillipsite-KK6(Si10Al6)O32 · 12H2OMon. 2/m : P21/m
9.GC.10Phillipsite-Na(Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] · 12H2OMon. 2/m : P21/m
9.GC.10Flörkeite(K3Ca2Na)[Al8Si8O32] · 12H2OTric. 1 : P1
9.GC.15MerlinoiteK5Ca2(Si23Al9)O64 · 24H2OOrth. mmm(2/m2/m2/m) : Immm
9.GC.20Mazzite-NaNa8[Al4Si14O36]2 · 30H2OHex. 6/mmm(6/m2/m2/m) : P63/mmc
9.GC.20Mazzite-Mg(Mg,K,Ca)5(Si26Al10)O72 · 28H2OHex. 6/mmm(6/m2/m2/m) : P63/mmc
9.GC.25PerlialiteK9Na(Ca,Sr)[Al2Si4O12]6 · 15H2OHex. 6/mmm(6/m2/m2/m) : P6/mmm
9.GC.30BoggsiteCa8Na3(Si,Al)96O192 · 70H2OOrth. mmm(2/m2/m2/m) : Imma
9.GC.35Paulingite-Ca(Ca,K,Na,Ba, ◻)10 (Si, Al)42O84 · 34H2OIso. m3m(4/m32/m)
9.GC.35Paulingite-K(K2,Ca,Na2,Ba)5[Al10Si35O90] · 45H2OIso. m3m(4/m32/m)
9.GC.35'Paulingite-Na'(Na2,K2,Ca,Ba)5[Al10Si35O90] · 45H2OIso.

Fluorescence of Gismondine-SrHide

Other InformationHide

Notes:
Slowly dissolves in 10% HCl.
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 Gismondine-SrHide

References for Gismondine-SrHide

Localities for Gismondine-SrHide

Showing 2 localities.

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.
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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.
Germany
 
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mayen
        • Seekante
Skrzyńska et al. (2023)
Israel (TL)
 
  • Southern District
    • Beersheba Subdistrict
      • Tamar Regional Council
        • Hatrurim Basin
          • Wadi Halamish
Skrzyńska et al. (2023)
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