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Zanazziite Mineral Data

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General Zanazziite Information

Help on Chemical  Formula: Chemical Formula: Ca2(Mg,Fe++)(Mg,Fe++,Al,Mn,Fe+++)4Be4(PO4)6(OH)4•6(H2O)
Help on Composition: Composition: Molecular Weight = 1,044.11 gm
   Calcium      7.68 %  Ca   10.74 % CaO
   Magnesium    6.98 %  Mg   11.58 % MgO
   Manganese    1.05 %  Mn    1.36 % MnO
   Beryllium    3.45 %  Be    9.58 % BeO
   Aluminum     0.78 %  Al    1.46 % Al2O3
   Iron         8.56 %  Fe   10.32 % FeO /  0.76 % Fe2O3
   Phosphorus  17.80 %  P    40.78 % P2O5
   Hydrogen     1.60 %  H    14.32 % H2O
   Oxygen      52.10 %  O
              ______        ______ 
              100.00 %      100.92 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Mg0.6Fe2+0.4Mg2.4Fe2+1.1Al0.3Mn2+0.2Fe3+0.1Be4(PO4)6(OH)3.4�6.6(H2O)
Help on Environment: Environment: Pegmatitic environment. Resembles roscherite.
Help on IMA Status: IMA Status: Approved IMA 1990
Help on Locality: Locality: Lavra da Ilha pegmatite, near Taquaral, in northeastern Minas Gerais, Brazil. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Dr. Pier F. Zanazzi (1939-) of the Universita degli Studi di Perugia, in recognition of his studies of the crystal structures and crystal chemistry of minerals.
Help on Name Pronunciation: Name Pronunciation: Zanazziite + Pronunciation Say ZANAZZIITE
Help on Synonym: Synonym: ICSD 4257
  PDF 46-1346

Zanazziite Image

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  Eosphorite   Zanazziite

Comments: Minor crystals of equant, olive green zanazziite and brown, lath-like crystals of eosphorite on quartz.
Location: Taquaral, Minas Gerais, Brazil. Scale: Picture size 1 cm.
© John Veevaert

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Comments: Olive-green prismatic translucent zanazziite microcrystals on quartz.
Location: Taquarel, Minas Gerais, Brazil. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Kosnarite   Zanazziite

Comments: Beige crystals of kosnarite with pinkish, radial aggregates of zanazziite on whte albite matrix.
Location: Jenipapo, Itinga, Minas Gerais, Brazil. Scale: Picture size 6 cm.
© Fabre Minerals

Zanazziite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3391:1:0.5571
Help on Cell Dimensions: Cell Dimensions: a = 15.874, b = 11.854, c = 6.605, Z = 2; beta = 95.35° V = 1,237.45 Den(Calc)= 2.80
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.91(1), 9.5(0.9), 3.16(0.7),

Physical Properties of Zanazziite

Help on Cleavage: Cleavage: {100} Good, {010} Distinct
Help on Color: Color: Pale olive green, Dark olive green.
Help on Density: Density: 2.76
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Zanazziite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2186,KPDmeas= 0.2217,KC= 0.2195
Ncalc = 1.61
Help on Optical Data: Optical Data: Biaxial (+), a=1.606, b=1.61, g=1.62, bire=0.0140, 2V(Calc)=66, 2V(Meas)=72.

Calculated Properties of Zanazziite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Zanazziite =2.80 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEZanazziite = 4.79 barns/electron
U=PEZanazziite x rElectron Density= 13.38 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zanazziite is Not Radioactive

Zanazziite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq � x(H2O)
  (42.07.07)Roscherite group Roscherite Ca(Mn,Fe)5Be4(PO4)6(OH)4•6(H2O) C1 1 Zanazziite Ca2(Mg,Fe)(Mg,Fe,Al,Mn,Fe)4Be4(PO4)6(OH)4•6(H2O) C 2/c 2/m Greifensteinite! Ca2Be4(Fe,Mn)5(PO4)6(OH)4•6(H2O) C 2/c 2/m Atencioite! Ca2Fe[]Mg2Fe2Be4(PO4)6(OH)4•6H2O P1 1 Guimaraesite Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O C 2/c 2/m Footemineite! Ca2MnMn2Mn2Be4(PO4)6(OH)4•6H2O P1 1 Ruifrancoite! Ca2([],Mn)2(Fe,Mn,Mg)4Be4(PO4)6(OH)4•6H2O C 2/c 2/m
Help on  Strunz Class: Strunz Class: 08.DA.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DA -With small (and occasionally larger) cations
08.DA.10 Roscherite Ca(Mn,Fe)5Be4(PO4)6(OH)4•6(H2O) C1 1
08.DA.10 Zanazziite Ca2(Mg,Fe)(Mg,Fe,Al,Mn,Fe)4Be4(PO4)6(OH)4•6(H2O) C 2/c 2/m
08.DA.10 Footemineite! Ca2MnMn2Mn2Be4(PO4)6(OH)4•6H2O P1 1
08.DA.10 Atencioite! Ca2Fe[]Mg2Fe2Be4(PO4)6(OH)4•6H2O P1 1
08.DA.10 Greifensteinite! Ca2Be4(Fe,Mn)5(PO4)6(OH)4•6(H2O) C 2/c 2/m
08.DA.10 Ruifrancoite! Ca2([],Mn)2(Fe,Mn,Mg)4Be4(PO4)6(OH)4•6H2O C 2/c 2/m
08.DA.10 Guimaraesite Ca2(Zn,Mg,Fe)5Be4(PO4)6(OH)4•6H2O C 2/c 2/m

Other Zanazziite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.76,p1732,1991) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Zanazziite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 08.DA.10





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