Paragonite Mineral Data + Say PARAGONITE

General Paragonite Information
Help on Chemical Formula: Chemical Formula: NaAl2(Si3Al)O10(OH)2
Help on Composition: Composition: Molecular Weight = 382.20 gm
   Sodium     6.02 %  Na    8.11 % Na2O
   Aluminum  21.18 %  Al   40.02 % Al2O3
   Silicon   22.05 %  Si   47.16 % SiO2
   Hydrogen   0.53 %  H     4.71 % H2O
   Oxygen    50.23 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaAl3Si3O10(OH)2
Help on Environment: Environment: Metamorphic mineral formed in schists and gneisses under a broad range of P-T conditions. Commonly mistaken for "sericite".
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1843
Help on Locality: Locality: Mte. Campione, Tessin, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "to mislead", in allusion to its originally having been mistaken for talc.
 

Paragonite Image

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Paragonite   Chloritoid

Comments: Grayish crystalline inclusion of chloritoid in white, massive paragonite.
Location: Drandorf Fundgrube Mine, Bockau, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag
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Paragonite

Comments: Silvery micaceous paragonite comprising schist rock, with garnet crystals.
Location: Gassettts, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Paragonite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.577:1:2.1732
Help on Cell Dimensions: Cell Dimensions: a = 5.13, b = 8.89, c = 19.32, Z = 4; beta = 95° V = 877.75 Den(Calc)= 2.89
Help on Crystal System: Crystal System: MonoclinicSpace Group: C 2/c,Cc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.522(1), 4.39(0.9), 3.203(0.8),
Click Here for Large Paragonite Structure Window Crystal Structure:

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Comodi P , Zanazzi P F , Physics and Chemistry of Minerals , 24 (1997) p.274-280, Pressure dependence of structural parameters of paragonite, Sample: P = .0001 kbar, Note: z-coordinate for T1 altered by author, Dec 2003

View Additional jPOWD Structure files for Paragonite
[2] [3] [4] [8]
 

Physical Properties of Paragonite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: White, Yellow.
Help on Density: Density: 2.78
Help on Diaphaniety: Diaphaniety: Transparent to translucent
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Paragonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2051,KPDmeas= 0.2132,KC= 0.2124
Help on Optical Data: Optical Data: Biaxial (-), a=1.564-1.58, b=1.594-1.609, g=1.6-1.609, bire=0.0290-0.0360, 2V(Calc)=0-46, 2V(Meas)=0-40.
 

Calculated Properties of Paragonite

Help on Electron Density: Electron Density:

relectron=2.76 gm/cc
note: rParagonite =2.78 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01053
Boson Index = 0.98947
Help on Photoelectric: Photoelectric:

PEParagonite = 1.57 barns/electron
U=PEParagonite x relectron= 4.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Paragonite is Not Radioactive
 

Paragonite Classification
Help on Dana Class: Dana Class: 71.2.2a.2 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.2)with 2:1 Layers
  (71.2.2a)Mica Group (Muscovite subgroup)
 
71.2.2a.1 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m
 
71.2.2a.2 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono
 
71.2.2a.3 Chernykhite (Ba,Na)V,Al)2(Si,Al)4O10(OH)2 C 2/c 2/m
 
71.2.2a.4 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m
 
71.2.2a.5 Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2 C 2/m 2/m
 
71.2.2a.6 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m
 
71.2.2a.6b Ferroceladonite! K2FeFeSi8O20(OH)4 C 2/m 2/m
 
71.2.2a.6c Ferro-aluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m
 
71.2.2a.6d Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m
 
71.2.2a.6e Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2
 
71.2.2a.7 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m
 
71.2.2a.8 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m
 
71.2.2a.9 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m
 
71.2.2a.10 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m
 
71.2.2a.11 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m
 
71.2.2a.12 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m
Help on Strunz Class: Strunz Class: VIII/H.10-50 VIII - Silicates
  VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups
  VIII/H.10 - Mica group, Muscovite series
 
VIII/H.10-10 Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m
 
VIII/H.10-20 Ferro-aluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m
 
VIII/H.10-30 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m
 
VIII/H.10-35 Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2
 
VIII/H.10-40 Ferroceladonite! K2FeFeSi8O20(OH)4 C 2/m 2/m
 
VIII/H.10-50 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono
 
VIII/H.10-60 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m
 
VIII/H.10-70 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m
 
VIII/H.10-80 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m
 
VIII/H.10-90 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m
 
VIII/H.10-95 Ganterite! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m
 
VIII/H.10-100 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m
 
VIII/H.10-110 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m
 

Other Paragonite Information
Help on References: References: NAME( Dana8) 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 Paragonite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 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 - UCLA - Petrography Thin-Sections 14 - WWW-MINCRYST

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Paragonite

NaAl2(Si3Al)O10(OH)2
Dana No: 71.2.2a.2 Strunz No: VIII/H.10-50
Locality:

 

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