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Amicite Mineral Data

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General Amicite Information

Help on Chemical  Formula: Chemical Formula: K2Na2Al4Si4O16•5(H2O)
Help on Composition: Composition: Molecular Weight = 690.51 gm
   Potassium  11.32 %  K    13.64 % K2O
   Sodium      6.66 %  Na    8.98 % Na2O
   Aluminum   15.63 %  Al   29.53 % Al2O3
   Silicon    16.27 %  Si   34.81 % SiO2
   Hydrogen    1.46 %  H    13.04 % H2O
   Oxygen     48.66 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2Na2Al4Si4O16•5(H2O)
Help on Environment: Environment: In veinlets cutting melilite-nephelinite volcanic rocks and pyroclastics (Hegau, Germany); in natrolite veinlets cutting ijolite-urtite pegmatites and apatite-nepheline rocks (Kola Peninsula, Russia).
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: In the Howenegg quarry, Hegau, Baden-Wurttemberg, Germany. From the Kukisvumchorr apatite deposit, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: To honor Giovan Battista, Amici (1786-1863), physicist, optician, and inventor of microscope optical elements.
Help on Name Pronunciation: Name Pronunciation: Amicite Say AMICITE
Help on Synonym: Synonym: ICSD 8523
  PDF 33-1273
 

Amicite Image

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  Amicite

Comments: White amicite crystals in massive amicite.
Location: Howenegg, Hegau, Baden-Wurttemberg, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Amicite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9811:1:0.9483
Help on Cell Dimensions: Cell Dimensions: a = 10.226, b = 10.422, c = 9.884, Z = 2; beta = 88.317° V = 1,052.94 Den(Calc)= 2.18
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: I2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.722(1), 4.22(0.9), 3.141(0.8),
 

Physical Properties of Amicite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.06
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Amicite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.091 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2284,KPDmeas= 0.2417,KC= 0.2217
Ncalc = 1.46 - 1.48
Help on Optical Data: Optical Data: Biaxial (?), b=1.498
 

Calculated Properties of Amicite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.18 gm/cc
note: Specific Gravity of Amicite =2.18 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0078471452
Boson Index = 0.9921528548
Help on Photoelectric: Photoelectric: PEAmicite = 2.33 barns/electron
U=PEAmicite x relectron= 5.10 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 163.73 (Gamma Ray American Petroleum Institute Units)
Concentration of Amicite per GRapi unit = 0.61 (%)

Estimated Radioactivity from Amicite - barely detectable

 

Amicite Classification

Help on  Dana Class: Dana Class: 77.01.03.02 (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 Amicite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Amicite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Amicite

K2Na2Al4Si4O16•5(H2O)
Dana No: 77.01.03.02 Strunz No: 09.GC.05
Locality:

 

Notes:

 

 
   
 


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