Amicite Mineral Data + Say AMICITE


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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 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 - SphenoidalH-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),
Click Here for Large Amicite Structure Window Crystal Structure:

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Alberti A , Vezzalini G , Acta Crystallographica, Section B , 35 (1979) p.2866-2869, The crystal structure of amicite, a zeolite, Locality: basaltic rock at Howenegg in Hegau, southern West Germany

 

Physical Properties of Amicite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.06
Help on Diaphaniety: Diaphaniety: 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
Help on Optical Data: Optical Data: Biaxial (?), b=1.498
 

Calculated Properties of Amicite

Help on Electron Density: Electron Density:

relectron=2.18 gm/cc
note: rAmicite =2.18 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00784
Boson Index = 0.99216
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)

Estimated Radioactivity from Amicite - barely detectable

 

Amicite Classification

Help on  Dana Class: Dana Class: 77.1.3.2 (77)Tectosilicate Zeolite group
  (77.1)true zeolites
  (77.1.3)Gismondine and related species
 
77.1.3.1 Gismondine Ca2Al4Si4O16·9(H2O) P 21/c 2/m
 
77.1.3.2 Amicite K2Na2Al4Si4O16·5(H2O) I2 2
 
77.1.3.3 Garronite Na2Ca5Al12Si20O64·27(H2O) I 41/a 4/m
 
77.1.3.4 Gobbinsite (Na2,Ca)2K2Al6Si10O32·12(H2O) P mn21 mm2
 
77.1.3.5 Harmotome (Ba,Na,K)1-2(Si,Al)8O16·6(H2O) P 21/m 2/m
 
77.1.3.6 Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16·6(H2O) P 21/m 2/m
 
77.1.3.6a Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16·6(H2O) P 21/m 2/m
 
77.1.3.6b Phillipsite-K! (K,Na,Ca)1-2(Si,Al)8O16·6(H2O) P 21/m 2/m
 
77.1.3.8 Perlialite K8Tl4Al12Si24O72·20(H2O) P 6/mmm 6/m 2/m 2/m
 
77.1.3.9 Paulingite-K (K2,Ca,Na2,Ba)5Al10Si35O90·45(H2O) Im3m 4/m 3 2/m
 
77.1.3.9a Paulingite-Na! (Na2,K2,Ca,Ba)5Al10Si35O90·45(H2O) Im3m 4/m 3 2/m
 
77.1.3.9b Paulingite-Ca! (Ca,K,Na,Ba)5[Al10Si35O84]·34(H2O) Im3m 4/m 3 2/m
 
77.1.3.10 Mazzite K2CaMg2(Al,Si)36O72·28(H2O) P 63/mmc 6/m 2/m 2/m
 
77.1.3.11 Merlinoite (K,Ca,Na,Ba)7Si23Al9O64·23(H2O) I mmm 2/m 2/m 2/m
 
77.1.3.12 Montesommaite (K,Na)9Al9Si23O64·10(H2O) F dd2 mm2
Help on  Strunz Class: Strunz Class: VIII/J.25-10 VIII - Silicates
  VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites
  VIII/J.25 - Zeolite group, Amicite - Phillipsite - Yugawaralite series
 
VIII/J.25-10 Amicite K2Na2Al4Si4O16·5(H2O) I2 2
 
VIII/J.25-20 Gismondine Ca2Al4Si4O16·9(H2O) P 21/c 2/m
 
VIII/J.25-30 Gobbinsite (Na2,Ca)2K2Al6Si10O32·12(H2O) P mn21 mm2
 
VIII/J.25-40 Garronite Na2Ca5Al12Si20O64·27(H2O) I 41/a 4/m
 
VIII/J.25-50 Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16·6(H2O) P 21/m 2/m
 
VIII/J.25-55 Phillipsite-K! (K,Na,Ca)1-2(Si,Al)8O16·6(H2O) P 21/m 2/m
 
VIII/J.25-60 Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16·6(H2O) P 21/m 2/m
 
VIII/J.25-70 Harmotome (Ba,Na,K)1-2(Si,Al)8O16·6(H2O) P 21/m 2/m
 
VIII/J.25-75 Montesommaite (K,Na)9Al9Si23O64·10(H2O) F dd2 mm2
 
VIII/J.25-80 Merlinoite (K,Ca,Na,Ba)7Si23Al9O64·23(H2O) I mmm 2/m 2/m 2/m
 
VIII/J.25-90 Yugawaralite CaAl2Si6O16·4(H2O) Pc 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Amicite

K2Na2Al4Si4O16·5(H2O)
Dana No: 77.1.3.2 Strunz No: VIII/J.25-10
Locality:

 

Notes:

 

 
   
 
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