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Gismondine

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System:
Monoclinic
Colour:
Colorless to white, very ...
Lustre:
Vitreous
Hardness:
4 - 5
Name:
Named for Carlo Giuseppe Gismondi (1762-1824), Italian mineralogist, who previously discovered "zeagonite" - a mixture of gismondine and phillipsite.
Zeolite Group.
"Gismondine-Ba" (proposed) has been found naturally as a secondary slag mineral on lead-rich slags. All other Gismondine is the calcium-rich member, for which "Gismondine-Ca" has been proposed.


Classification of Gismondine

'Grandfathered' (first described prior to 1959)
9..

9 : SILICATES (Germanates)
:
:
Dana 7th ed.:
77.1.3.1
77.1.3.1

77 : TECTOSILICATES Zeolites
1 : Zeolite group - True zeolites

First Recorded Occurrence of Gismondine

Physical Properties of Gismondine

Vitreous
Colour:
Colorless to white, very pale pink.
Streak:
White
Hardness (Mohs):
4 - 5

Crystallography of Gismondine

Crystal System:
Monoclinic
Cell Parameters:
a = 10.24Å, b = 10.61Å, c = 9.84Å
β = 92.8°
Ratio:
a:b:c = 0.965 : 1 : 0.927
Unit Cell Volume:
V 1,067.80 ų (Calculated from Unit Cell)

Optical Data of Gismondine

Type:
Biaxial (-)
RI values:
nα = 1.536 nβ = 1.539 nγ = 1.542
2V:
Measured: 84° , Calculated: 88°
Max Birefringence:
δ = 0.006
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r < v strong

Relationship of Gismondine to other Species

9..Alumino-ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
9..Aluminobarroisite☐{CaNa}{Mg3Al2}(AlSi7O22)(OH)2
9..Alumino-magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
9..Aluminokatophorite{Na}{CaNa}{Fe42+Al}[(AlSi7)O22](OH)2
9..Aluminotschermakite☐{Ca2}{Mg3Al2}(Al2Si6O22)(OH)2
9..Alumino-ferrowinchite ☐{CaNa}{Fe42+Al}(Si8O22)(OH)2
9..Alumino-ferrobarroisite☐{CaNa}{Fe32+Al2}(AlSi7O22)(OH)2
9..Magnesiosadanagaite{Na}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2
9..ParaspurriteCa5(SiO4)2(CO3)
9..UviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
9..ZinnwalditeKLiFe2+Al(AlSi3O10)(F,OH)2
9..HelviteMn42+(Be3Si3O12)S
9..Fluorthalénite-(Y)Y3(Si3O10)F
9..Ferriwhittakerite{Na}{Na1+xLi1-x}{Fe23+Mg2Li}(Si8O22)(OH)2
9..Ferri-ottoliniite◻{NaLi}{Mg3Fe23+}(Si8O22)(OH)2
9..IMA2007-015K[CaNa][Fe32+Al2][(OH)2|Al2Si6O22]
9..Sodicpedrizite
9..Sodic-ferropedrizite
9..IMA2008-041Na7(Al6-xSi6+xO24)(C2O4)0.5+x · 5H2O (0 < x < 0.5)
9..IMA2009-059BaKNaTi2(Si4O12)O2
9..IMA2009-082Ba2(Ca,Mg)(V3+,Al)2(Si4O10)(OH,F)2O(CO3)2
9..IMA2009-091{K}{Ca2}{Mg4Al}(Al2Si6O22)F2
77.1.3.6Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32 . 12H2O

Other Names for Gismondine

Name in Other Languages:

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.

References for Gismondine

Reference List:
American Mineralogist: 48: 664-672.

Bulletin de Mineralogie: 107: 805-812.

Allen, S. et al. (2002): Ion exchange in the synthetic gismondine, zeolite MAP. Phys. Chem. Chem. Phys., 2002, 4, 2409–2415.

Internet Links for Gismondine

mindat.org URL:
http://www.mindat.org/min-10315.html
Please feel free to link to this page.
Specimens:
The following Gismondine specimens are currently listed for sale on minfind.com.

Localities for Gismondine

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.
Mineral and/or Locality  
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