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Anandite Mineral Data

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General Anandite Information

Help on Chemical  Formula: Chemical Formula: (Ba,K)(Fe++,Mg)3(Si,Al,Fe)4O10(S,OH)2
Help on Composition: Composition: Molecular Weight = 593.15 gm
   Potassium   1.65 %  K     1.99 % K2O
   Barium     17.36 %  Ba   19.39 % BaO
   Magnesium   3.07 %  Mg    5.10 % MgO
   Aluminum    3.18 %  Al    6.02 % Al2O3
   Iron       24.01 %  Fe   27.25 % FeO /  4.04 % Fe2O3
   Silicon    14.20 %  Si   30.39 % SiO2
   Hydrogen    0.08 %  H     0.76 % H2O
   Sulfur      8.11 %  S     8.11 % S2-
                -   %  S    -4.05 % -O=S 
   Oxygen     28.32 %  O
             ______        ______ 
             100.00 %       98.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba0.75K0.25Fe2+2.25Mg0.75Si3Al0.7Fe3+0.3O10S1.5(OH)0.5
Help on Environment: Environment: Found in banded iron ores.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Wilagedera prospect, North Western Province, Sri Lanka. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ananda Kentish Coomaraswamy (1877-1947), first director of the Mineral Survey of Ceylon (Sri Lanka).
Help on Name Pronunciation: Name Pronunciation: Anandite Say ANANDITE

Anandite Image

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  Anandite   Gillespite

Comments: Black micaceous anandite with dark red gillespite.
Location: Esquire No. 7 Claim, Big Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Anandite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5736:1:2.115
Help on Cell Dimensions: Cell Dimensions: a = 5.412, b = 9.434, c = 19.953, Z = 4; beta = 94.87° V = 1,015.06 Den(Calc)= 3.88
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.32(1), 4.99(0.9), 2.49(0.8),2.72(0.5), 2.68(0.4), 1.66(0.3), 1.991(0.3),

Physical Properties of Anandite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Black.
Help on Density: Density: 3.94
Help on Diaphaneity: Diaphaneity: Subtranslucent to opaque
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: gray white

Optical Properties of Anandite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.216 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.235 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2236,KPDmeas= 0.2202,KC= 0.1811
Ncalc = 1.7 - 1.71
Help on Optical Data: Optical Data: Biaxial (+), a=1.855, g=1.88, bire=0.0250, 2V(Meas)=0.
Help on Pleochroism (x): Pleochroism (x): green.
Help on Pleochroism (y): Pleochroism (y): green.
Help on Pleochroism (z): Pleochroism (z): brown.

Calculated Properties of Anandite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.74 gm/cc
note: Specific Gravity of Anandite =3.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEAnandite = 81.99 barns/electron
U=PEAnandite x relectron= 306.77 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 22.57 (Gamma Ray American Petroleum Institute Units)
Concentration of Anandite per GRapi unit = 4.43 (%)

Estimated Radioactivity from Anandite - barely detectable


Anandite Classification

Help on  Dana Class: Dana Class: 71.02.02c.04 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.02)with 2:1 Layers
  (71.02.02c)Mica Group (Margarite subgroup)
71.02.02c.01 Margarite CaAl2(Al2Si2)O10(OH)2 C 2/c 2/m
71.02.02c.02 Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 C 2/m 2/m
71.02.02c.03 Bityite CaLiAl2(AlBeSi2)O10(OH)2 C 2/c 2/m
71.02.02c.04 Anandite (Ba,K)(Fe,Mg)3(Si,Al,Fe)4O10(S,OH)2 C 2/m 2/m
71.02.02c.05 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2 C 2/m 2/m
71.02.02c.06 Ferrokinoshitalite! (Ba,K)(Fe,Mg)3(Si2Al2)O10(OH,F)2 C 2/m 2/m
71.02.02c.07 Ganterite! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m
71.02.02c.08 Oxykinoshitalite! (Ba,K)(Mg,Fe,Ti)3(Si,Al)4O10O2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.EC.35 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
09.EC.35 Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 C 2/m 2/m
09.EC.35 Bityite CaLiAl2(AlBeSi2)O10(OH)2 C 2/c 2/m
09.EC.35 Anandite (Ba,K)(Fe,Mg)3(Si,Al,Fe)4O10(S,OH)2 C 2/m 2/m
09.EC.35 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2 C 2/m 2/m
09.EC.35 Ferrokinoshitalite! (Ba,K)(Fe,Mg)3(Si2Al2)O10(OH,F)2 C 2/m 2/m
09.EC.35 Oxykinoshitalite! (Ba,K)(Mg,Fe,Ti)3(Si,Al)4O10O2 C 2/m 2/m

Other Anandite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Anandite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Franklin Minerals(Dunn)
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: 71.02.02c.04 Strunz No: 09.EC.35





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