Mineralogy Database

Cyrilovite Mineral Data

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General Cyrilovite Information

Help on Chemical  Formula: Chemical Formula: NaFe+++3(PO4)2(OH)4•2(H2O)
Help on Composition: Composition: Molecular Weight = 484.53 gm
   Sodium       4.74 %  Na    6.40 % Na2O
   Iron        34.58 %  Fe   49.44 % Fe2O3
   Phosphorus  12.78 %  P    29.30 % P2O5
   Hydrogen     1.66 %  H    14.87 % H2O
   Oxygen      46.23 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaFe3+3(PO4)2(OH)4•2(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1953
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality Cyrilov, Czechoslovakia.
Help on Synonym: Synonym: ICSD 90612
  PDF 43-672
 

Cyrilovite Image

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  Cyrilovite

Comments: Greenish-yellow crystals of cyrilovite in matrix.
Location: Rengersdorf, Görlitz, Oberlausitz, Saxony, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Cyrilovite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.64085
Help on Cell Dimensions: Cell Dimensions: a = 7.334, c = 19.368, Z = 4; V = 1,041.76 Den(Calc)= 3.09
Help on Crystal System: Crystal System: Tetragonal - Trapezohedral H-M Symbol (4 2 2) Space Group: P 412121,P 432121
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.85(1), 2.658(0.8), 3.186(0.8),
 

Physical Properties of Cyrilovite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, Orange yellow, Brown.
Help on Density: Density: 3.08
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Pseudo Cubic - Crystals show a cubic outline.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow
 

Optical Properties of Cyrilovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.062 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2544,KPDmeas= 0.2552,KC= 0.2721
Ncalc = 1.84
Help on Optical Data: Optical Data: Uniaxial (-), e=1.769, w=1.803, bire=0.0340.
 

Calculated Properties of Cyrilovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Cyrilovite =3.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.007554886
Boson Index = 0.992445114
Help on Photoelectric: Photoelectric: PECyrilovite = 10.94 barns/electron
U=PECyrilovite x rElectron Density= 33.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cyrilovite is Not Radioactive
 

Cyrilovite Classification

Help on  Dana Class: Dana Class: 42.07.08.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq � x(H2O)
  (42.07.08)Cyrilovite Group
 
42.07.08.01 Cyrilovite NaFe3(PO4)2(OH)4•2(H2O) P 412121,P 432121 4 2 2
 
42.07.08.02 Wardite NaAl3(PO4)2(OH)4•2(H2O) P 41212 4 2 2
Help on  Strunz Class: Strunz Class: 08.DL.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DL -With large and medium-sized cations, (OH, etc.):RO4 = 2:1
 
08.DL.10 Cyrilovite NaFe3(PO4)2(OH)4•2(H2O) P 412121,P 432121 4 2 2
 
08.DL.10 Millisite (Na,K)CaAl6(PO4)4(OH)9•3(H2O) P 41212,P 43212 4 2 2
 
08.DL.10 Wardite NaAl3(PO4)2(OH)4•2(H2O) P 41212 4 2 2
 

Other Cyrilovite Information

Help on References: References: NAME( Duda&Rejl90) 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 Cyrilovite :
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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Cyrilovite

NaFe+++3(PO4)2(OH)4•2(H2O)
Dana No: 42.07.08.01 Strunz No: 08.DL.10
Locality:

 

Notes:

 

 
   
 


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