Mineralogy Database

Rodolicoite Mineral Data

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General Rodolicoite Information

Help on Chemical  Formula: Chemical Formula: Fe+++PO4
Help on Composition: Composition: Molecular Weight = 150.82 gm
   Iron        37.03 %  Fe   52.94 % Fe2O3
   Phosphorus  20.54 %  P    47.06 % P2O5
   Oxygen      42.43 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+(PO4)
Help on Environment: Environment: As nodules in cavities intergrown with grattarolaite. Isostructural with berlinite; polymorphic relationship with heterosite.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: The Castelnuovo mine, Santa Barbara lignite area, Upper Arno River Valley, 30 km SE of Florence, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Francesco Rodolico (1905�1988), professor of mineralogy, University of Florence, Italy, specialist of the history of geology and of building and ornamental materials, au thor of Le pietre delle citt� d�Italia
Help on Name Pronunciation: Name Pronunciation: Rodolicoite + Pronunciation Say RODOLICOITE
Help on Synonym: Synonym: ICSD 38062
  PDF 50-1635

Rodolicoite Image

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  Grattarolaite   Rodolicoite

Comments: Brown grattarolaite, intimately intergrown with brown rodolicoite.
Location: Castelnuovo Mine, Santa Barbara lignite district, San Giovanni Valdarno, Valdarno (Val d'Arno), Arezzo Province, Tuscany, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Rodolicoite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.22167
Help on Cell Dimensions: Cell Dimensions: a = 5.048, c = 11.215, Z = 3; V = 247.50 Den(Calc)= 3.04
Help on Crystal System: Crystal System: Trigonal - Trapezohedral H-M Symbol (3 2) Space Group: R 3121
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.445(1), 4.36(0.19), 2.362(0.14),

Physical Properties of Rodolicoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Red brown.
Help on Density: Density: 3.07
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: brown

Optical Properties of Rodolicoite

Help on Optical Data: Optical Data: NCalc= 1.77 - from Gladstone-Dale relationship (KC = 0.2529) where Ncalc=Dcalc*KC+1
NCalc= 1.78 - from Gladstone-Dale relationship (KC = 0.2529) where Ncalc=Dmeas*KC+1

Calculated Properties of Rodolicoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.94 gm/cc
note: Specific Gravity of Rodolicoite =3.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.008053895
Boson Index = 0.991946105
Help on Photoelectric: Photoelectric: PERodolicoite = 12.13 barns/electron
U=PERodolicoite x rElectron Density= 35.69 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rodolicoite is Not Radioactive

Rodolicoite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.04)A+ XO4
  (38.04.02)Berlinite Group Berlinite AlPO4 P 3121,P 3221 3 2 Alarsite! AlAsO4 P 3121,P 3221 3 2 Rodolicoite! FePO4 R 3121 3 2
Help on  Strunz Class: Strunz Class: 08.AA.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AA -With small cations (some also with larger ones)
08.AA.05 Alarsite! AlAsO4 P 3121,P 3221 3 2
08.AA.05 Berlinite AlPO4 P 3121,P 3221 3 2
08.AA.05 Rodolicoite! FePO4 R 3121 3 2

Other Rodolicoite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.9,p1101-1106,1997)
Help on See Also: See Also: Links to other databases for Rodolicoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 08.AA.05





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