Mineralogy Database

Deerite Mineral Data

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General Deerite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Mn)6(Fe+++,Al)3Si6O20(OH)5
Help on Composition: Composition: Molecular Weight = 1,052.69 gm
   Manganese  10.44 %  Mn   13.48 % MnO
   Aluminum    1.92 %  Al    3.63 % Al2O3
   Iron       33.16 %  Fe   27.30 % FeO / 17.07 % Fe2O3
   Silicon    16.01 %  Si   34.25 % SiO2
   Hydrogen    0.48 %  H     4.28 % H2O
   Oxygen     38.00 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+4Mn2+2Fe3+2.25Al0.75Si6O20(OH)5
Help on Environment: Environment: In meta-ironstones and Cu-Fe sulfide deposits, in blueschist facies metasediments formed at high pressure and low temperature.
Help on IMA Status: IMA Status: Approved IMA 1964
Help on Locality: Locality: Laytonville quarry, 5 miles south of Laytonville, Mendocino Co. California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for William Alexander Deer (1910- ), mineralogist-petrologist, Cambridge University, Cambridge, England.
Help on Name Pronunciation: Name Pronunciation: Deerite Say DEERITE
Help on Synonym: Synonym: ICSD 10421
  PDF 19-421

Deerite Image

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Comments: Black bladed deerite crystals embedded in quartz and fibrous riebeckite.
Location: Laytonville quarry, Laytonville, Mendocino County, California, USA. Scale: See Image.
© Rruff Database

Deerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5712:1:0.5065
Help on Cell Dimensions: Cell Dimensions: a = 10.786, b = 18.88, c = 9.564, Z = 4; beta = 107.45° V = 1,857.98 Den(Calc)= 3.76
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.03(1), 3.01(0.7), 2.64(0.55),

Physical Properties of Deerite

Help on Cleavage: Cleavage: {110} Good
Help on Color: Color: Black.
Help on Density: Density: 3.837
Help on Diaphaneity: Diaphaneity: Transparent to Subopaque
Help on Hardness: Hardness: 6 - Orthoclase
Help on Streak: Streak: black gray

Optical Properties of Deerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2274,KPDmeas= 0.2228,KC= 0.2249
Ncalc = 1.85 - 1.86
Help on Optical Data: Optical Data: Biaxial (?), a=1.84, g=1.87, bire=0.0300

Calculated Properties of Deerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.73 gm/cc
note: Specific Gravity of Deerite =3.84 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEDeerite = 13.27 barns/electron
U=PEDeerite x rElectron Density= 49.46 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Deerite is Not Radioactive

Deerite Classification

Help on  Dana Class: Dana Class: (69)Inosilicate Chains with Side Branches or Loops
  (69.02)with P>2
  (69.02.03)Howieite group Howieite Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13 P1,P1 Tri Taneyamalite (Na,Ca)(Mn,Mg)12[(Si,Al)6O17]2(O,OH)10 P1 1 Deerite (Fe,Mn)6(Fe,Al)3Si6O20(OH)5 P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.DH.60 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DH -Inosilicates with 4-periodic single chains, Si4O12
09.DH.60 Deerite (Fe,Mn)6(Fe,Al)3Si6O20(OH)5 P 21/a 2/m

Other Deerite 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 Deerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.DH.60





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