Preiswerkite Mineral Data + Say PREISWERKITE

General Preiswerkite Information
Help on Chemical Formula: Chemical Formula: NaMg2Al3Si2O10(OH)2
Help on Composition: Composition: Molecular Weight = 402.72 gm
   Sodium      5.71 %  Na    7.69 % Na2O
   Magnesium  12.07 %  Mg   20.02 % MgO
   Aluminum   20.10 %  Al   37.98 % Al2O3
   Silicon    13.95 %  Si   29.84 % SiO2
   Hydrogen    0.50 %  H     4.47 % H2O
   Oxygen     47.67 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaMg2Al3Si2O10(OH)2
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Link to MinDat.org Location Data.
 

Preiswerkite Image

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Preiswerkite

Comments: Pale green fine grained preiswerkite masses in dark amphibolite rock.
Location: Geisspfad, Binnental, Valias, Switzerland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Preiswerkite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5777:1:1.085
Help on Cell Dimensions: Cell Dimensions: a = 5.228, b = 9.049, c = 9.819, Z = 2; beta = 100.42° V = 456.86 Den(Calc)= 2.93
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.503(1), 2.572(1), 2.457(0.7),
Click Here for Large Preiswerkite Structure Window Crystal Structure:

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Oberti R , Ungaretti L , Tlili A , Smith D C , Robert J-L , American Mineralogist , 78 (1993) p.1290-1298, The crystal structure of preiswerkite, Sample: KP9

View Additional jPOWD Structure files for Preiswerkite
[1]
 

Physical Properties of Preiswerkite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Greenish white, Light green.
Help on Density: Density: 2.96
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Preiswerkite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2035,KPDmeas= 0.2015,KC= 0.2105
Help on Optical Data: Optical Data: Biaxial (-), a=1.56, b=1.614, g=1.615, bire=0.0550, 2V(Calc)=14, 2V(Meas)=5-7.
 

Calculated Properties of Preiswerkite

Help on Electron Density: Electron Density:

relectron=2.91 gm/cc
note: rPreiswerkite =2.93 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01881
Boson Index = 0.98119
Help on Photoelectric: Photoelectric:

PEPreiswerkite = 1.49 barns/electron
U=PEPreiswerkite x relectron= 4.33 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Preiswerkite is Not Radioactive
 

Preiswerkite Classification
Help on Dana Class: Dana Class: 71.2.2b.15 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.2)with 2:1 Layers
  (71.2.2b)Mica Group (Biotite subgroup)
 
71.2.2b.1 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m
 
71.2.2b.1a Tetra-ferriphlogopite! KMg3FeSi3O10(OH)2 2/m
 
71.2.2b.1b Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m
 
71.2.2b.2 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m
 
71.2.2b.3 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m
 
71.2.2b.3a Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m
 
71.2.2b.4 Tetra-ferri-annite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m
 
71.2.2b.5 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m
 
71.2.2b.5a Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m
 
71.2.2b.6 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m
 
71.2.2b.7 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono
 
71.2.2b.8 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m
 
71.2.2b.8a Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m
 
71.2.2b.8b Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono
 
71.2.2b.9 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m
 
71.2.2b.10 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m
 
71.2.2b.11 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m
 
71.2.2b.12 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m
 
71.2.2b.13 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m
 
71.2.2b.14 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m
 
71.2.2b.15 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m
 
71.2.2b.16 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m
 
71.2.2b.17 IMA2004-049! NaMg3(AlSi3)O10(OH)2 C 2/m 2/m
Help on Strunz Class: Strunz Class: VIII/H.11-140 VIII - Silicates
  VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups
  VIII/H.11 - Mica group, Biotite series
 
VIII/H.11-00* Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m
 
VIII/H.11-10 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m
 
VIII/H.11-20 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m
 
VIII/H.11-30 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m
 
VIII/H.11-35 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m
 
VIII/H.11-40 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m
 
VIII/H.11-50 Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m
 
VIII/H.11-60 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m
 
VIII/H.11-70 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m
 
VIII/H.11-80 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m
 
VIII/H.11-90 Tetra-ferriphlogopite! KMg3FeSi3O10(OH)2 2/m
 
VIII/H.11-100 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m
 
VIII/H.11-102 Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m
 
VIII/H.11-105 Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m
 
VIII/H.11-110 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m
 
VIII/H.11-120 Tetra-ferri-annite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m
 
VIII/H.11-130 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m
 
VIII/H.11-140 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m
 
VIII/H.11-150 Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m
 
VIII/H.11-160 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m
 

Other Preiswerkite Information
Help on References: References: 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 Preiswerkite :
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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Preiswerkite

NaMg2Al3Si2O10(OH)2
Dana No: 71.2.2b.15 Strunz No: VIII/H.11-140
Locality:

 

Notes:

 
 
   
 
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