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Gismondine Mineral Data

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General Gismondine Information

Help on Chemical  Formula: Chemical Formula: Ca2Al4Si4O16•9(H2O)
Help on Composition: Composition: Molecular Weight = 718.55 gm
   Calcium   11.16 %  Ca   15.61 % CaO
   Aluminum  15.02 %  Al   28.38 % Al2O3
   Silicon   15.63 %  Si   33.45 % SiO2
   Hydrogen   2.52 %  H    22.56 % H2O
   Oxygen    55.67 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Al4Si4O16•9(H2O)
Help on Environment: Environment: Alteration product of plagioclase.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1817
Help on Locality: Locality: Capo di Bove, near Rome, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Italian mineralogist, Carlo Giuseppe Gismondi (1762-1824), lecturer in Mineralogy in Rome.
Help on Name Pronunciation: Name Pronunciation: Gismondine + Pronunciation Say GISMONDINE
Help on Synonym: Synonym: Abrazite
  Aricite
  Gismondite
  ICSD 61439
  PDF 39-1373
  Zeagonite
 

Gismondine Image

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  Gismondine

Comments: Clear crystal of gismondine on matrix.
Location: Alban Hills, near Rome, Latium, Italy. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Gismondine Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9441:1:0.9271
Help on Cell Dimensions: Cell Dimensions: a = 10.023, b = 10.616, c = 9.843, Z = 2; beta = 92.42° V = 1,046.40 Den(Calc)= 2.28
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.71(1), 3.19(0.7), 4.25(0.7),
 

Physical Properties of Gismondine

Help on Cleavage: Cleavage: {101} Imperfect
Help on Color: Color: Blue white, Colorless, Gray, White, Red.
Help on Density: Density: 2.26
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).
Help on Habit: Habit: Pseudo Tetragonal - Crystals show a tetragonal shape.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Gismondine

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2364,KPDmeas= 0.2385,KC= 0.2378
Ncalc = 1.54
Help on Optical Data: Optical Data: Biaxial (-), a=1.536, b=1.539, g=1.542, bire=0.0060, 2V(Calc)=88, 2V(Meas)=84.
 

Calculated Properties of Gismondine

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.30 gm/cc
note: Specific Gravity of Gismondine =2.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0077228866
Boson Index = 0.9922771134
Help on Photoelectric: Photoelectric: PEGismondine = 2.44 barns/electron
U=PEGismondine x rElectron Density= 5.61 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gismondine is Not Radioactive
 

Gismondine Classification

Help on  Dana Class: Dana Class: 77.01.03.01 (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.03)Gismondine and related species
 
77.01.03.01 Gismondine Ca2Al4Si4O16•9(H2O) P 21/c 2/m
 
77.01.03.02 Amicite K2Na2Al4Si4O16•5(H2O) I2 2
 
77.01.03.03 Garronite Na2Ca5Al12Si20O64•27(H2O) I 41/a 4/m
 
77.01.03.04 Gobbinsite (Na2,Ca)2K2Al6Si10O32•12(H2O) P mn21 mm2
 
77.01.03.05 Harmotome (Ba,Na,K)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m
 
77.01.03.06 Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m
 
77.01.03.06a Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m
 
77.01.03.06b Phillipsite-K! (K,Na,Ca)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m
 
77.01.03.08 Perlialite K8Tl4Al12Si24O72•20(H2O) P 6/mmm 6/m 2/m 2/m
 
77.01.03.09 Paulingite-K (K2,Ca,Na2,Ba)5Al10Si35O90•45(H2O) Im3m 4/m 3 2/m
 
77.01.03.09a Paulingite-Na! (Na2,K2,Ca,Ba)5Al10Si35O90•45(H2O) Im3m 4/m 3 2/m
 
77.01.03.09b Paulingite-Ca! (Ca,K,Na,Ba)5[Al10Si35O84]•34(H2O) Im3m 4/m 3 2/m
 
77.01.03.10 Mazzite-Mg K2CaMg2(Al,Si)36O72•28(H2O) P 63/mmc 6/m 2/m 2/m
 
77.01.03.10a Mazzite-Na! Na8Al8Si28O72•30H2O P 63/mmc 6/m 2/m 2/m
 
77.01.03.11 Merlinoite (K,Ca,Na,Ba)7Si23Al9O64•23(H2O) I mmm 2/m 2/m 2/m
 
77.01.03.12 Montesommaite (K,Na)9Al9Si23O64•10(H2O) F dd2 mm2
Help on  Strunz Class: Strunz Class: 09.GC.05 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GC -Chains of doubly-connected 4-membered rings
 
09.GC.05 Amicite K2Na2Al4Si4O16•5(H2O) I2 2
 
09.GC.05 Garronite Na2Ca5Al12Si20O64•27(H2O) I 41/a 4/m
 
09.GC.05 Gobbinsite (Na2,Ca)2K2Al6Si10O32•12(H2O) P mn21 mm2
 
09.GC.05 Gismondine Ca2Al4Si4O16•9(H2O) P 21/c 2/m
 

Other Gismondine Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Gismondine :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
18 - Zeolite Database by Bruno Herreros

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Gismondine

Ca2Al4Si4O16•9(H2O)
Dana No: 77.01.03.01 Strunz No: 09.GC.05
Locality:

 

Notes:

 

 
   
 


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