Poudretteite Mineral Data + Say POUDRETTEITE

General Poudretteite Information
Help on Chemical Formula: Chemical Formula: KNa2B3Si12O30
Help on Composition: Composition: Molecular Weight = 912.90 gm
   Potassium   4.28 %  K     5.16 % K2O
   Sodium      5.04 %  Na    6.79 % Na2O
   Silicon    36.92 %  Si   78.98 % SiO2
   Boron       1.18 %  B     3.81 % B2O3
   Oxygen     52.58 %  O
             ______        ______ 
             100.00 %       94.74 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KNa2BSi12O30
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: IMA1986-028
 

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Poudretteite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.31702
Help on Cell Dimensions: Cell Dimensions: a = 10.239, c = 13.485, Z = 2; V = 1,224.33 Den(Calc)= 2.48
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.253(1), 5.13(1), 2.815(0.6),
Click Here for Large Poudretteite Structure Window Crystal Structure:

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Grice J D , Ercit T S , Van Velthuizen J , Dunn P J , The Canadian Mineralogist , 25 (1987) p.763-766, Poudretteite, KNa2B3Si12O30, a new member of the osumilite group from, Mont Saint-Hilaire, Quebec, and its crystal structure, Locality: Mont Saint-Hilaire, Quebec, Canada

 

Physical Properties of Poudretteite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Light pink.
Help on Density: Density: 2.51
Help on Diaphaniety: Diaphaniety: Transparent
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Poudretteite

Help on Optical Data: Optical Data: NCalc= 1.48 - from Gladstone-Dale relationship (KC = 0.1955) where Ncalc=Dcalc*KC+1
NCalc= 1.49 - from Gladstone-Dale relationship (KC = 0.1955) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Poudretteite

Help on Electron Density: Electron Density:

relectron=2.47 gm/cc
note: rPoudretteite =2.48 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01985
Boson Index = 0.98015
Help on Photoelectric: Photoelectric:

PEPoudretteite = 1.96 barns/electron
U=PEPoudretteite x relectron= 4.84 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 61.48 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Poudretteite - barely detectable

 

Poudretteite Classification
Help on Dana Class: Dana Class: 63.2.1a.8 (63)Cyclosilicate Condensed Rings
  (63.2)Milarite - Osumilite type (6x2) Double Rings
  (63.2.1a)Milarite - Osumilite group (Milarite - Osumilite subgroup)
 
63.2.1a.1 Brannockite KSn2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.2.1a.2 Chayesite K(Mg,Fe)4Fe(Si12O30) P 6/mcc 6/m 2/m 2/m
 
63.2.1a.3 Darapiosite KNa2Zr[Li(Mn,Zr)2Si12O30] P 6/mcc 6/m 2/m 2/m
 
63.2.1a.4 Eifelite KNa3Mg4Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.2.1a.5 Merrihueite (K,Na)2(Fe,Mg)5Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.2.1a.6 Osumilite-(Fe) (K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
 
63.2.1a.7 Osumilite-(Mg) (K,Na)(Mg,Fe)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
 
63.2.1a.8 Poudretteite KNa2B3Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.2.1a.9 Sugilite KNa2(Fe,Mn,Al)2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.2.1a.10 Yagiite (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 P 6/mmc 6/m 2/m 2/m
 
63.2.1a.11 Dusmatovite K(K,Na,[])(Mn,Y,Zr)2(Zn,Li)3Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.2.1a.12 Milarite K2Ca4Al2Be4Si24O60·(H2O) P 6/mcc 6/m 2/m 2/m
 
63.2.1a.13 Sogdianite (K,Na)2(Li,Fe,Al)3ZrSi12O30 P 6/mmm 6/m 2/m 2/m
 
63.2.1a.14 Roedderite (Na,K)2(Mg,Fe)5Si12O30 P 63/mmc 6/m 2/m 2/m
 
63.2.1a.15 Berezanskite! KLi3Ti2Si12O30 P 6/mcc 6/m 2/m 2/m
 
63.2.1a.16 Shibkovite! K(Ca,Mn,Na)2(K2-x,[]x)2ZnSi12O30(x~0.8) P 6/mcc 6/m 2/m 2/m
 
63.2.1a.17 Trattnerite! (Fe,Mg)2(Mg,Fe)3(Si12O30) P 6/mcc 6/m 2/m 2/m
 
63.2.1a.18 Almarudite! K([],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30] P 6/mcc 6/m 2/m 2/m
 
63.2.1a.19 IMA2003-045a! (Sc,Ca)2KBe3Si12O30 P 6/mmc 6/m 2/m 2/m
Help on Strunz Class: Strunz Class: VIII/E.22-10 VIII - Silicates
  VIII/E - Cyklosilicates, double six rings [Si12O30]12-
  VIII/E.22 - Millarite - Osumilite series
 
VIII/E.22-10 Poudretteite KNa2B3Si12O30 P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-20 Milarite K2Ca4Al2Be4Si24O60·(H2O) P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-22 Almarudite! K([],Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30] P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-25 Trattnerite! (Fe,Mg)2(Mg,Fe)3(Si12O30) P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-30 Eifelite KNa3Mg4Si12O30 P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-40 Roedderite (Na,K)2(Mg,Fe)5Si12O30 P 63/mmc 6/m 2/m 2/m
 
VIII/E.22-50 Chayesite K(Mg,Fe)4Fe(Si12O30) P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-60 Merrihueite (K,Na)2(Fe,Mg)5Si12O30 P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-70 Yagiite (Na,K)3Mg4(Al,Mg)6(Si,Al)24O60 P 6/mmc 6/m 2/m 2/m
 
VIII/E.22-80 Osumilite-(Mg) (K,Na)(Mg,Fe)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-90 Osumilite-(Fe) (K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30 P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-100 Emeleusite Na4Li2Fe2Si12O30 Pnna 2/m 2/m 2/m
 
VIII/E.22-110 Sugilite KNa2(Fe,Mn,Al)2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-120 Sogdianite (K,Na)2(Li,Fe,Al)3ZrSi12O30 P 6/mmm 6/m 2/m 2/m
 
VIII/E.22-125 Berezanskite! KLi3Ti2Si12O30 P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-130 Darapiosite KNa2Zr[Li(Mn,Zr)2Si12O30] P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-133 Shibkovite! K(Ca,Mn,Na)2(K2-x,[]x)2ZnSi12O30(x~0.8) P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-135 Dusmatovite K(K,Na,[])(Mn,Y,Zr)2(Zn,Li)3Si12O30 P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-140 Brannockite KSn2Li3Si12O30 P 6/mcc 6/m 2/m 2/m
 
VIII/E.22-150 Armenite BaCa2Al6Si9O30·2(H2O) Pnc2 mm2
 

Other Poudretteite Information
Help on References: References: PHYS. PROP.(Am.Min.,Vol.73,p1497,1988)
Help on See Also: See Also: Links to other databases for Poudretteite :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (MinSocAm) 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 - WWW-MINCRYST 16 -École des Mines de Paris

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Poudretteite

KNa2B3Si12O30
Dana No: 63.2.1a.8 Strunz No: VIII/E.22-10
Locality:

 

Notes:

 
 
   
 
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