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Dozyite Mineral Data

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General Dozyite Information

Help on Chemical  Formula: Chemical Formula: (Mg7Al2)(Si4Al2)O15(OH)12
Help on Composition: Composition: Molecular Weight = 834.48 gm
   Magnesium  20.39 %  Mg   33.81 % MgO
   Aluminum   12.93 %  Al   24.44 % Al2O3
   Silicon    13.46 %  Si   28.80 % SiO2
   Hydrogen    1.45 %  H    12.95 % H2O
   Oxygen     51.77 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg7Al4Si4O15(OH)12
Help on Environment: Environment: Altered skarn near a copper-gold-silver ore zone. Cr-rich serpentinite.
Help on IMA Status: IMA Status: Approved IMA 1995
Help on Locality: Locality: Ertsberg East complex, Carstensz Mountains, central Irian Jaya, Indonesia. Wood Chrome mine, Lancaster Co., Pennsylvania, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Dutch geologist Jean-Jacques Dozy (1908 - 2004), who discovered the Ertzberg mineral deposits.
Help on Name Pronunciation: Name Pronunciation: Dozyite Say DOZYITE
Help on Synonym: Synonym: ICSD 77351
  IMA1993-042
  PDF 47-1866
 

Dozyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5777:1:2.3279
Help on Cell Dimensions: Cell Dimensions: a = 5.323, b = 9.214, c = 21.45, Z = 2; beta = 94.717° V = 1,048.48 Den(Calc)= 2.64
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.129(1), 3.56(0.8), 2.427(0.6),
 

Physical Properties of Dozyite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Colorless, Light violet, Light green.
Help on Density: Density: 2.66
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Dozyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.024 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2186,KPDmeas= 0.2169,KC= 0.2221
Ncalc = 1.59
Help on Optical Data: Optical Data: Biaxial (+), a=1.575, b=1.575, g=1.581, bire=0.0060, 2V(Calc)=0, 2V(Meas)=0-5. Dispersion very weak.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): very pale tan.
 

Calculated Properties of Dozyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.66 gm/cc
note: Specific Gravity of Dozyite =2.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEDozyite = 1.38 barns/electron
U=PEDozyite x rElectron Density= 3.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Dozyite is Not Radioactive
 

Dozyite Classification

Help on  Dana Class: Dana Class: 71.04.02.01 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.04)interlayered 1:1, 2:1, and octahedra
  (71.04.02)Interstratified Chlorite-Smectite group
 
71.04.02.01 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m
 
71.04.02.02 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono
 
71.04.02.03 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m
 
71.04.02.04 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O) Unk Ortho
 
71.04.02.05 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10•n(H2O) Unk Ortho
 
71.04.02.06 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono
 
71.04.02.07 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4•2(H2O) Unk Mono
 
71.04.02.08 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2•n(H2O) Unk Mono
 
71.04.02.09 Glagolevite! NaMg6[Si3AlO10](OH,O)8•H2O C1 1
Help on  Strunz Class: Strunz Class: 09.EC.60 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
 
09.EC.60 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2•n(H2O) Unk Mono
 
09.EC.60 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m
 
09.EC.60 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10•n(H2O) Unk Ortho
 
09.EC.60 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono
 
09.EC.60 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono
 
09.EC.60 Illite* (K,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)] C 2/m 2/m
 
09.EC.60 Hydrobiotite [K(Mg,Fe)3(Al,Fe)Si3O10(OH,F)2]•[(Mg,Fe,Al)3(Si,Al)4O10(OH)2•4(H2O)] C 2/m 2/m
 
09.EC.60 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono
 
09.EC.60 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4•2(H2O) Unk Mono
 
09.EC.60 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m
 
09.EC.60 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12•5(H2O) Unk Ortho
 
09.EC.60 Brinrobertsite! (Na,K,Ca)x(Al,Fe,Mg)4(Si,Al)8O20(OH)4•3.54(H2O)[x=0.35,n=3.54] pseudo 2/m 2/m
 

Other Dozyite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p65-67,1995) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Dozyite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info
12 - WWW-MINCRYST

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Print or Cut-and-Paste your Dozyite Specimen Label here :

Dozyite

(Mg7Al2)(Si4Al2)O15(OH)12
Dana No: 71.04.02.01 Strunz No: 09.EC.60
Locality:

 

Notes:

 

 
   
 


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