Fillowite Mineral Data + Say FILLOWITE

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General Fillowite Information

Help on Chemical  Formula: Chemical Formula: Na2Ca(Mn,Fe++)7(PO4)6
Help on Composition: Composition: Molecular Weight = 1,042.27 gm
   Sodium       4.41 %  Na    5.95 % Na2O
   Calcium      3.85 %  Ca    5.38 % CaO
   Manganese   26.36 %  Mn   34.03 % MnO
   Iron        10.72 %  Fe   13.79 % FeO
   Phosphorus  17.83 %  P    40.86 % P2O5
   Oxygen      36.84 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2CaMn2+5Fe2+2(PO4)6
Help on Environment: Environment: Accessory mineral in a zoned granite pegmatite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1879
Help on Locality: Locality: Branchville, Fairfield County, Connecticut, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Abijah N. Fillow (1822-1895), of Branchville, Connecticut, who supplied minerals from his quarry at the locality.
Help on Synonym: Synonym: ICSD 100869
  PDF 18-516
 

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Fillowite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.84694
Help on Cell Dimensions: Cell Dimensions: a = 15.282, c = 43.507, Z = 18; V = 8,799.34 Den(Calc)= 3.54
Help on Crystal System: Crystal System: Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.814(1), 3.017(0.7), 3.64(0.65),
Help on Forms: Forms:

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Forms: [ 1 0 1] [ 0 0 1]

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Araki T , Moore P B , American Mineralogist , 66 (1981) p.827-842, Fillowite, Na2Ca(Mn,Fe)7(PO4)6: Its crystal structure

 

Physical Properties of Fillowite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Yellow, Reddish brown, Colorless.
Help on Density: Density: 3.43
Help on Diaphaniety: Diaphaniety: Transparent to translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Resinous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Fillowite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1899,KPDmeas= 0.196,KC= 0.1903
Help on Optical Data: Optical Data: Uniaxial (+), w=1.671, e=1.676, bire=0.0010.
 

Calculated Properties of Fillowite

Help on Electron Density: Electron Density:

relectron=3.40 gm/cc
note: rFillowite =3.54 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.0025
Boson Index = 0.9975
Help on Photoelectric: Photoelectric:

PEFillowite = 11.43 barns/electron
U=PEFillowite x relectron= 38.89 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Fillowite is Not Radioactive

 

Fillowite Classification

Help on  Dana Class: Dana Class: 38.2.5.1 (38)Anhydrous Phosphates, etc
  (38.2)(A+ B++)5 (XO4)3
  (38.2.5)Dana Group
 
38.2.5.1 Fillowite Na2Ca(Mn,Fe)7(PO4)6 R 3 3
 
38.2.5.2 Johnsomervilleite Na2Ca(Mg,Fe,Mn)7(PO4)6 R 3 3
 
38.2.5.3 Chladniite Na2Ca(Mg,Fe)7(PO4)6 R 3 3
 
38.2.5.4 Galileiite! NaFe4(PO4)3 R 3 3
Help on  Strunz Class: Strunz Class: VII/A.08-20 VII - Phosphates, Arsenates and Vanadates
  VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na
  VII/A.08 - Chladniite - Berzeliite - Palenzonaite series
 
VII/A.08-03 Galileiite! NaFe4(PO4)3 R 3 3
 
VII/A.08-05 Chladniite Na2Ca(Mg,Fe)7(PO4)6 R 3 3
 
VII/A.08-10 Johnsomervilleite Na2Ca(Mg,Fe,Mn)7(PO4)6 R 3 3
 
VII/A.08-20 Fillowite Na2Ca(Mn,Fe)7(PO4)6 R 3 3
 
VII/A.08-30 Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 I a3d 4/m 3 2/m
 
VII/A.08-40 Manganberzeliite (Ca,Na)3(Mn,Mg)2(AsO4)3 I a3d 4/m 3 2/m
 
VII/A.08-45 Schaferite! NaCa2Mg2(VO4)3 I a3d 4/m 3 2/m
 
VII/A.08-50 Palenzonaite (Ca,Na)3Mn(V,As,Si)3O12 I a3d 4/m 3 2/m
 

Other Fillowite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Fillowite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 - Minerals of Wisconsin 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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

Fillowite

Na2Ca(Mn,Fe++)7(PO4)6
Dana No: 38.2.5.1 Strunz No: VII/A.08-20
Locality:

 

Notes:

 

 
   
 
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