Mineralogy Database

Fillowite Mineral Data

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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 Name Pronunciation: Name Pronunciation: Fillowite + Pronunciation Say FILLOWITE
Help on Synonym: Synonym: ICSD 100869
  PDF 18-516
 

Fillowite Image

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  Fillowite

Comments: Brown fillowite lining vugs in matrix.
Location: Sullivan Mine, Sullivan, New Hampshire. Scale: Specimen Size 4.8 x 3.9 x 1.5 cm.
© Rob Lavinsky

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 - Rhombohedral H-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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Help on Above

Forms: ( 1 0 1) ( 0 0 1)

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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 Diaphaneity: Diaphaneity: 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
Ncalc = 1.65 - 1.67
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: Bulk Density (Electron Density)=3.40 gm/cc
note: Specific Gravity of Fillowite =3.54 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0025006297
Boson Index = 0.9974993703
Help on Photoelectric: Photoelectric: PEFillowite = 11.43 barns/electron
U=PEFillowite x rElectron Density= 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: 38.02.05.01 (38)Anhydrous Phosphates, etc
  (38.02)(A+ B++)5 (XO4)3
  (38.02.05)Fillowite Group
 
38.02.05.01 Fillowite Na2Ca(Mn,Fe)7(PO4)6 R 3 3
 
38.02.05.02 Johnsomervilleite Na2Ca(Mg,Fe,Mn)7(PO4)6 R 3 3
 
38.02.05.03 Chladniite Na2Ca(Mg,Fe)7(PO4)6 R 3 3
 
38.02.05.04 Galileiite! NaFe4(PO4)3 R 3 3
 
38.02.05.05 Xenophyllite! Na4Fe7(PO4)6 P1 or P1 Tri
 
38.02.05.06 Stornesite-(Y)! (Y,Ca)[]2Na6(Ca,Na)8(Mg,Fe)43(PO4)36 R 3 3
Help on  Strunz Class: Strunz Class: 08.AC.50 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
 
08.AC.50 Fillowite Na2Ca(Mn,Fe)7(PO4)6 R 3 3
 
08.AC.50 Chladniite Na2Ca(Mg,Fe)7(PO4)6 R 3 3
 
08.AC.50 Johnsomervilleite Na2Ca(Mg,Fe,Mn)7(PO4)6 R 3 3
 
08.AC.50 Galileiite! NaFe4(PO4)3 R 3 3
 
08.AC.50 Stornesite-(Y)! (Y,Ca)[]2Na6(Ca,Na)8(Mg,Fe)43(PO4)36 R 3 3
 
08.AC.50 Xenophyllite! Na4Fe7(PO4)6 P1 or P1 Tri
 

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 - 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
15 - WWW-MINCRYST

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

Fillowite

Na2Ca(Mn,Fe++)7(PO4)6
Dana No: 38.02.05.01 Strunz No: 08.AC.50
Locality:

 

Notes:

 

 
   
 


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