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Zaccagnaite Mineral Data

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General Zaccagnaite Information

Help on Chemical  Formula: Chemical Formula: Zn4Al2(OH)12(CO3)•3(H2O)
Help on Composition: Composition: Molecular Weight = 629.83 gm
   Aluminum   9.00 %  Al   17.00 % Al2O3
   Zinc      40.49 %  Zn   50.40 % ZnO
   Hydrogen   2.88 %  H    25.74 % H2O
   Carbon     1.91 %  C     6.99 % CO2
   Oxygen    45.73 %  O
            ______        ______ 
            100.00 %      100.13 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn3.9Al2.1(OH)12(CO3)•3(H2O)
Help on Environment: Environment: Hydrothermal alteration product of sphalerite and Al-rich fluids in calcite vein cavities within the Carrara marble. A member of the hydrotalcite-manasseite groups.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: Gioia quarry, Colonnata valley, Carrara basin region, Apuan Alps, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Domenico Zaccagna (1851-1940) who published the first geologic map of the Apuan Alps and a collector of minerals from the Carrara Marble.
Help on Synonym: Synonym: IMA1997-019
 

Zaccagnaite Image

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  Zaccagnaite   Zincowoodwardite

Comments: White to pale bluish zaccagnaite intimately intergrown with zincowoodwardite.
Location: Hilarion Mine, Agios Konstantinos, Lavrion District, Attikí Prefecture, Greece. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

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  Zaccagnaite   Fraipontite

Comments: Scanning electron microscope image of hexagonal, tapering, prismatic zaccagnaite crystals, covered by a thin crust of fraipontite. (AmMin 86:1294).
Location: Marble quarries of the Carrara basin (Apuan Alps, Italy). Scale: See Image.
© American Mineralogist

Zaccagnaite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:4.91895
Help on Cell Dimensions: Cell Dimensions: a = 3.0725, c = 15.1135, Z = 0.3333; V = 123.56 Den(Calc)= 2.82
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.51(1)(002), 1.542(0.75)(108), 1.539(0.75)(110),3.794(0.5)(004), 1.83(0.4)(106), 2.175(0.4)(104), 2.511(0.4)(102), 1.89(0.25)(008), 2.65(0.25)(100),
 

Physical Properties of Zaccagnaite

Help on Color: Color: White, Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Zaccagnaite

Help on Optical Data: Optical Data: Uniaxial (?).
  NCalc= 1.61 - from Gladstone-Dale relationship (KC = 0.2171) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Zaccagnaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.80 gm/cc
note: Specific Gravity of Zaccagnaite =2.82 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEZaccagnaite = 19.89 barns/electron
U=PEZaccagnaite x rElectron Density= 55.64 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Zaccagnaite is Not Radioactive
 

Zaccagnaite Classification

Help on  Dana Class: Dana Class: 16b.06.01.04 (16b)Carbonates - Hydroxyl or Halogen
  (16b.06)Dana Type
  (16b.06.01)Sjorgrenite-Hydrotalcite Group (Sojogrenite Subgroup:Hexagonal)
 
16b.06.01.01 Manasseite Mg6Al2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
16b.06.01.02 Barbertonite Mg6Cr2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
16b.06.01.03 Sjogrenite Mg6Fe2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
16b.06.01.04 Zaccagnaite! Zn4Al2(OH)12(CO3)•3(H2O) P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.DA.45 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
 
05.DA.45 Brugnatellite Mg6Fe(CO3)(OH)13•4(H2O) P 63/mmc 6/m 2/m 2/m
 
05.DA.45 Barbertonite Mg6Cr2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
05.DA.45 Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)•2(H2O) P 6/mcm, P 6cm, P 6c2 Hex
 
05.DA.45 Zaccagnaite! Zn4Al2(OH)12(CO3)•3(H2O) P 63/mmc 6/m 2/m 2/m
 
05.DA.45 Manasseite Mg6Al2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 
05.DA.45 Sjogrenite Mg6Fe2(CO3)(OH)16•4(H2O) P 63/mmc 6/m 2/m 2/m
 

Other Zaccagnaite Information

Help on References: References: NAME( AmMin, Vol 86, p 1293-1301) PHYS. PROP.(AmMin, Vol 86, p 1293-1301) OPTIC PROP.(AmMin, Vol 86, p 1293-1301)
Help on See Also: See Also: Links to other databases for Zaccagnaite :
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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Zaccagnaite

Zn4Al2(OH)12(CO3)•3(H2O)
Dana No: 16b.06.01.04 Strunz No: 05.DA.45
Locality:

 

Notes:

 

 
   
 


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