Zaccagnaite Mineral Data (original) (raw)

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

Click Here for Larger Zaccagnaite Image in a New Browser Window Images:

Click Here for Larger Zaccagnaite Image in a New Browser Window Images:

Click Here for Larger Zaccagnaite Image 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 DipyramidalH-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),

Click Here for Large Zaccagnaite Structure Window Crystal Structure:

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| | Merlino S , Orlandi P , American Mineralogist , 86 (2001) p.1293-1301, Carraraite and zaccagnaite, two new minerals from the Carrara marble quarries:, their chemical compositions, physical properties and structural features | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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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Print or Cut-and-Paste your Zaccagnaite Specimen Label here :

Zaccagnaite

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

Notes: