Gismondine-Ca
A valid IMA mineral species
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About Gismondine-Ca
Carlo Giuseppe Gismondi (1762-1824)
Formula:
CaAl2Si2O8 · 4H2O
Colour:
Colorless, white, grayish, bluish white, reddish
Lustre:
Vitreous
Hardness:
4½
Specific Gravity:
2.20 - 2.26
Crystal System:
Monoclinic
Member of:
Name:
Named gismondine in 1817 for Carlo Giuseppe Gismondi (1762-1824), Italian mineralogist, who previously discovered "zeagonite" - a mixture of gismondine and phillipsite. The suffix was added by the IMA in 2021, after the discovery of gismondine-Sr. The suffix/modifier follows the naming convention for zeolites and denotes the dominant extra-framework cation.
Nearly all gismondines found and studied over almost two centuries are calcium-dominant.
In 2001, a barium-dominant gismondine, "gismondine-Ba" has been discovered in slag material (of course not approved, as valid species, by IMA CNMNC).
The Ca analogue of gismondine-Sr was approved in 2021.
In 2001, a barium-dominant gismondine, "gismondine-Ba" has been discovered in slag material (of course not approved, as valid species, by IMA CNMNC).
The Ca analogue of gismondine-Sr was approved in 2021.
Unique Identifiers
Mindat ID:
1701
Long-form identifier:
mindat:1:1:1701:1
GUID
(UUID V4):
(UUID V4):
ae647b31-2b91-44fa-bf30-62135f431537
IMA Classification of Gismondine-Ca
Approved
IMA status notes:
Renamed by the IMA
IMA Formula:
Ca2(Si4Al4)O16 · 8H2O
First published:
1817
Classification of Gismondine-Ca
9.GC.05
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered rings
9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
C : Chains of doubly-connected 4-membered rings
16.9.25
16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca
16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca
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 |
|---|---|---|
| Gis | 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 Gismondine-Ca
Vitreous
Transparency:
Transparent, Translucent
Colour:
Colorless, white, grayish, bluish white, reddish
Streak:
White
Hardness:
4½ on Mohs scale
Cleavage:
Distinct/Good
Two poor to distinct cleavages parallel to form {232}.
Two poor to distinct cleavages parallel to form {232}.
Fracture:
Conchoidal, Sub-Conchoidal
Density:
2.20 - 2.26 g/cm3 (Measured) 2.28 g/cm3 (Calculated)
Optical Data of Gismondine-Ca
Type:
Biaxial (-)
RI values:
nα = 1.525 - 1.540 nβ = 1.531 - 1.544 nγ = 1.541 - 1.550
2V:
Measured: 82° to 86°
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Optical Extinction:
Y = b; Z ∧ c = 42.5°.
Chemistry of Gismondine-Ca
Mindat Formula:
CaAl2Si2O8 · 4H2O
Crystallography of Gismondine-Ca
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 10.02(3) Å, b = 10.61(5) Å, c = 9.843(15) Å
β = 92.25°
β = 92.25°
Ratio:
a:b:c = 0.944 : 1 : 0.928
Unit Cell V:
1,045.62 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Simple pseudotetragonal dipyramids.
Twinning:
Very common
Epitaxial Relationships of Gismondine-Ca
Epitaxial Minerals:
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.706 Å | (100) |
| 4.25 Å | (70) |
| 3.19 Å | (70) |
| 4.93 Å | (60) |
| 3.13 Å | (60) |
| 7.26 Å | (55) |
| 2.738 Å | (55) |
Type Occurrence of Gismondine-Ca
Synonyms of Gismondine-Ca
Other Language Names for Gismondine-Ca
German:Aricit
Spanish:Gismondina-Ca
Relationship of Gismondine-Ca to other Species
Member of:
Other Members of this group:
| Gismondine-Ba | Ba2Al4Si4O16 · 4-6H2O | |
| Gismondine-Sr | Sr4(Si8Al8O32) · 9H2O | Orth. 2 2 2 : C2 2 21 |
Common Associates
Associated Minerals Based on Photo Data:
| 35 photos of Gismondine-Ca associated with Phillipsite Subgroup | |
| 19 photos of Gismondine-Ca associated with Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
| 11 photos of Gismondine-Ca associated with Chabazite-Ca | (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O |
| 8 photos of Gismondine-Ca associated with Calcite | CaCO3 |
| 6 photos of Gismondine-Ca associated with Tobermorite | Ca4Si6O17(H2O)2 · (Ca · 3H2O) |
| 4 photos of Gismondine-Ca associated with Phillipsite-K | (K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O |
| 4 photos of Gismondine-Ca associated with Gyrolite | NaCa16Si23AlO60(OH)8 · 14H2O |
| 4 photos of Gismondine-Ca associated with Wollastonite | Ca3(Si3O9) |
| 3 photos of Gismondine-Ca associated with Phillipsite-Ca | Ca3(Si10Al6)O32 · 12H2O |
| 3 photos of Gismondine-Ca associated with Willhendersonite | KCa[Al3Si3O12] · 5H2O |
Related Minerals - Strunz-mindat Grouping
| 9.GC. | Garronite-Na | Na6(Al6Si10O32) · 8.5H2O |
| 9.GC. | Gismondine-Sr | Sr4(Si8Al8O32) · 9H2O |
| 9.GC.05 | Amicite | K2Na2Al4Si4O16 · 5H2O |
| 9.GC.05 | Garronite-Ca | Na2Ca5Al12Si20O64 · 27H2O |
| 9.GC.05 | Gobbinsite | Na5(Si11Al5)O32 · 11H2O |
| 9.GC.05 | Gismondine-Ba | Ba2Al4Si4O16 · 4-6H2O |
| 9.GC.10 | Harmotome | Ba2(Si12Al4)O32 · 12H2O |
| 9.GC.10 | Phillipsite-Ca | Ca3(Si10Al6)O32 · 12H2O |
| 9.GC.10 | Phillipsite-K | (K,Na,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O |
| 9.GC.10 | Phillipsite-Na | (Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] · 12H2O |
| 9.GC.10 | Flörkeite | (K3Ca2Na)[Al8Si8O32] · 12H2O |
| 9.GC.10 | Martinandresite | Ba2(Al4Si12O32) · 10H2O |
| 9.GC.15 | Merlinoite | (K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O |
| 9.GC.20 | Mazzite-Mg | (Mg,K,Ca)5(Si26Al10)O72 · 28H2O |
| 9.GC.20 | Mazzite-Na | Na8[Al4Si14O36]2 · 30H2O |
| 9.GC.25 | Perlialite | K9Na(Ca,Sr)[Al2Si4O12]6 · 15H2O |
| 9.GC.30 | Boggsite | Ca8Na3(Si,Al)96O192 · 70H2O |
| 9.GC.35 | Paulingite-Ca | (Ca,K,Na,Ba, ◻)10 (Si, Al)42O84 · 34H2O |
| 9.GC.35 | Paulingite-K | (K2,Ca,Na2,Ba)5[Al10Si35O90] · 45H2O |
| 9.GC.35 | Paulingite-Na | (Na2,K2,Ca,Ba)5[Al10Si35O90] · 45H2O |
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 Gismondine-Ca
mindat.org URL:
https://www.mindat.org/min-1701.html
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Gismondine-Ca
Reference List:
Des Cloizeaux, Alfred (1883) Note sur l'existence de deux axes optiques écartés dans les cristaux de Gismondine. Bulletin de Minéralogie, 6 (9) 301-305 doi:10.3406/bulmi.1883.1836
Des Cloizeaux, Alfred (1884) Nouvelle note sur la Gismondine et sur la Christianite. Bulletin de Minéralogie, 7 (3) 135-139 doi:10.3406/bulmi.1884.2353
Walker, G. P. L. (1962) Low-potash gismondine from Ireland and Iceland. Mineralogical Magazine and Journal of the Mineralogical Society, 33 (258) 187-201 doi:10.1180/minmag.1962.033.258.02
Fischer, Karl (1963) The crystal structure determination of the zeolite, gismondite, CaAl2Si2O8·4H2O. American Mineralogist, 48 (5-6) 664-671
Vezzalini, Giovanna, Oberti, Roberta (1984) The crystal chemistry of gismondines : the non-existence of K-rich gismondines. Bulletin de Minéralogie, 107 (6) 805-812 doi:10.3406/bulmi.1984.7822
Artioli, G., Rinaldi, R., Kvick, Å., Smith, J.V. (1986) Neutron diffraction structure refinement of the zeolite gismondine at 15 K. Zeolites, 6 (5) 361-366 doi:10.1016/0144-2449(86)90063-1
Coombs, Douglas S., Alberti, Alberto, Armbruster, Thomas, Artioli, Gilberto, Colella, Carmine, Galli, Ermanno, Grice, Joel D., Liebau, Friedrich, Mandarino, Joseph A., Minato, Hideo, Nickel, Ernest H., Passaglia, Elio, Peacor, Donald R., Quartieri, Simona, Rinaldi, Romano, Ross, Malcolm I., Sheppard, Richard A., Tillmanns, Ekkehart, Vezzalini, Giovanna (1997) Recommended nomenclature for zeolite minerals; report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist, 35 (6) 1571-1606
Localities for Gismondine-Ca
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.
Austria | |
| Kolitsch (2008) |
Canada | |
| Van Velthuizen et al. (2006) |
| Horváth et al. (1990) +1 other reference |
| Tarassoff et al. (2006) |
Czech Republic | |
| P.Pauliš et al. (2014) |
| Rychlý et al. (1980) | |
| |
France | |
| Lacroix A. (1893) |
Germany | |
| Hentschel (1983) |
| Hentschel (1987) |
| Peacor et al. (1984) |
| in the collection of Christof Schäfer | |
| Hentschel (1983) |
| Hentschel (1975) |
| in the collection of Christof Schäfer | |
| in the collection of Christof Schäfer | |
| in the collection of Christof Schäfer | |
| in the collection of Christof Schäfer |
| Schüller et al. (1986) |
| Hentschel (1983) | |
| Hentschel (1987) |
| Hentschel (1993) |
| Hentschel (1987) |
| Hentschel (1973) +1 other reference |
Israel | |
| Kruszewski et al. (2021) |
Italy | |
| Russo et al. (2004) +1 other reference |
| Christof Schäfer. +1 other reference |
| Antonio Borrelli collection +1 other reference |
| Joan Rosell-Riba (2023) |
| Wadoski-Romeijn et al. (2013) |
Jordan | |
| Galuskin et al. (2023) |
Mexico | |
| |
New Zealand | |
| Rod Martin personal collection |
| Blackhead Quarry +1 other reference |
Portugal | |
| Pedro Alves collection and analytical ... |
Russia | |
| Ivanyuk et al. (2017) +1 other reference |
Spain | |
| Calvo et al. (2013) |
| Calvo et al. (2010) | |
| Calvo et al. (2013) |
UK | |
| G.P.L. Walker and I.S.E. Carmichael (1962) +2 other references |
USA | |
| |
| American Mineralogist (1969) |
| |
| Mineralogical Society of America - ... |
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Graulay quarry, Hillesheim, Gerolstein, Vulkaneifel, Rhineland-Palatinate, Germany