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Ferroalluaudite Mineral Data

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General Ferroalluaudite Information

Help on Chemical  Formula: Chemical Formula: NaCaFe++(Fe++,Mn,Fe+++,Mg)2(PO4)3
Help on Composition: Composition: Molecular Weight = 474.99 gm
   Sodium       5.32 %  Na    7.18 % Na2O
   Calcium      0.84 %  Ca    1.18 % CaO
   Magnesium    1.02 %  Mg    1.70 % MgO
   Manganese    5.78 %  Mn    7.47 % MnO
   Iron        27.04 %  Fe    9.08 % FeO / 28.58 % Fe2O3
   Phosphorus  19.56 %  P    44.83 % P2O5
   Oxygen      40.42 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.1Ca0.1Fe2+0.6Mn2+0.5Fe3+1.7Mg0.2(PO4)3
Help on Environment: Environment: Zoned granitic pegmatites in phosphate nodules.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Pleasant Valley Pegmatite and the Helen Beryl mine, near Custer, Custer County, South Dakota, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For dominant ferrous iron content and relationship to alluaudite.
Help on Synonym: Synonym: Ferro-alluaudite - Renamed Ferroalluaudite by Mineralogical Record, v39 (2008), p131
  IMA1987-046a
 

Ferroalluaudite Image

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  Ferroalluaudite

Comments: Dark green crystalline ferro alluaudite in pegmatite.
Location: Chandler Mills Mine, Newport, Sullivan County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferroalluaudite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.869:1:0.513
Help on Cell Dimensions: Cell Dimensions: a = 10.898, b = 12.54, c = 6.434, Z = 4; beta = 114.6° V = 799.47 Den(Calc)= 3.95
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.703(1), 6.24(0.7), 3.085(0.55),
 

Physical Properties of Ferroalluaudite

Help on Color: Color: Blue green.
Help on Diaphaneity: Diaphaneity: Semitransparent
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 5 - Apatite
 

Optical Properties of Ferroalluaudite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.17 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1854,KC= 0.2233
Ncalc = 1.88
Help on Optical Data: Optical Data: Biaxial (+), a=1.727, g=1.738, bire=0.0110
Help on Pleochroism (x): Pleochroism (x): dull green or pale blue.
Help on Pleochroism (y): Pleochroism (y): bright blue-tinged green.
Help on Pleochroism (z): Pleochroism (z): bright blue-tinged green.
 

Calculated Properties of Ferroalluaudite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.82 gm/cc
note: Specific Gravity of Ferroalluaudite =3.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0069617791
Boson Index = 0.9930382209
Help on Photoelectric: Photoelectric: PEFerroalluaudite = 10.77 barns/electron
U=PEFerroalluaudite x rElectron Density= 41.15 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferroalluaudite is Not Radioactive
 

Ferroalluaudite Classification

Help on  Dana Class: Dana Class: 38.02.03.05 (38)Anhydrous Phosphates, etc
  (38.02)(A+ B++)5 (XO4)3
  (38.02.03)Alluaudite-Wyllieite Group (Alluaudite Subgroup)
 
38.02.03.01 Ferrohagendorfite* (Na,Ca)2Fe(Fe,Fe)2(PO4)3 I 21/a 2/m
 
38.02.03.02 Hagendorfite NaCaMn(Fe,Fe,Mg)2(PO4)3 I 21/a 2/m
 
38.02.03.03 Varulite NaCaMn(Mn,Fe,Fe)2(PO4)3 C 2/c 2/m
 
38.02.03.04 Maghagendorfite NaMgMn(Fe,Fe)2(PO4)3 I 21/a 2/m
 
38.02.03.05 Ferroalluaudite NaCaFe(Fe,Mn,Fe,Mg)2(PO4)3 C 2/a 2/m
 
38.02.03.06 Alluaudite NaCaFe(Mn,Fe,Fe,Mg)2(PO4)3 C 2/c 2/m
 
38.02.03.07 Odanielite Na(Zn,Mg)3H2(AsO4)3 C 2/c 2/m
 
38.02.03.08 Johillerite Na(Mg,Zn)3Cu(AsO4)3 I2/c 2/m
 
38.02.03.09 Nickenichite Na0,8Ca0,4(Mg,Fe,Al)3Cu0,4(AsO4)3 C 2/c 2/m
 
38.02.03.10 Yazganite! NaFe2(Mg,Mn)(AsO4)3•H2O C 2/c 2/m
 
38.02.03.11 IMA2008-054! NaCaMn2(PO4)[PO3(OH)]2 C 2/c 2/m
 
38.02.03.12 IMA2008-064! Na16Mn25Al8(PO4)30 Pc m
Help on  Strunz Class: Strunz Class: 08.AC.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
 
08.AC.10 Alluaudite NaCaFe(Mn,Fe,Fe,Mg)2(PO4)3 C 2/c 2/m
 
08.AC.10 Arseniopleite (Ca,Na)(Na,Pb)Mn(Mn,Mg,Fe)2(AsO4)3 I2/a 2/m
 
08.AC.10 Ferrohagendorfite* (Na,Ca)2Fe(Fe,Fe)2(PO4)3 I 21/a 2/m
 
08.AC.10 Caryinite (Na,Pb)(Ca,Na)(Ca,Mn)(Mn,Mg)2(AsO4)3 I2/c 2/m
 
08.AC.10 Hagendorfite NaCaMn(Fe,Fe,Mg)2(PO4)3 I 21/a 2/m
 
08.AC.10 Johillerite Na(Mg,Zn)3Cu(AsO4)3 I2/c 2/m
 
08.AC.10 Ferroalluaudite NaCaFe(Fe,Mn,Fe,Mg)2(PO4)3 C 2/a 2/m
 
08.AC.10 Odanielite Na(Zn,Mg)3H2(AsO4)3 C 2/c 2/m
 
08.AC.10 Maghagendorfite NaMgMn(Fe,Fe)2(PO4)3 I 21/a 2/m
 
08.AC.10 Nickenichite Na0,8Ca0,4(Mg,Fe,Al)3Cu0,4(AsO4)3 C 2/c 2/m
 
08.AC.10 Varulite NaCaMn(Mn,Fe,Fe)2(PO4)3 C 2/c 2/m
 
08.AC.10 Bradaczekite! NaCu4(AsO4)3 C 2/c 2/m
 
08.AC.10 Yazganite! NaFe2(Mg,Mn)(AsO4)3•H2O C 2/c 2/m
 
08.AC.10 IMA2008-054! NaCaMn2(PO4)[PO3(OH)]2 C 2/c 2/m
 

Other Ferroalluaudite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Ferroalluaudite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Ferroalluaudite

NaCaFe++(Fe++,Mn,Fe+++,Mg)2(PO4)3
Dana No: 38.02.03.05 Strunz No: 08.AC.10
Locality:

 

Notes:

 

 
   
 


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