Zaccagnaite Mineral Data

Zaccagnaite Mineral Data

General Zaccagnaite Information

Chemical Formula:

Zn4Al2(OH)12(CO3)·3(H2O)

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

Empirical Formula:

Zn_3.9Al_2.1(OH)₁₂(CO₃)·3(H₂O)

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.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

Gioia quarry, Colonnata valley, Carrara basin region, Apuan Alps, Italy. Link to MinDat.org Location Data.

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.

Synonym:

IMA1997-019

Zaccagnaite Image

Images:

Zaccagnaite Zincowoodwardite

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

Images:

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

Axial Ratios:

a:c = 1:4.91895

Cell Dimensions:

a = 3.0725, c = 15.1135, Z = 0.3333; V = 123.56 Den(Calc)= 2.82

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/I_o): 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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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

Color:

White, Colorless.

Diaphaniety:

Transparent

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Zaccagnaite

Optical Data:

Uniaxial (?).

NCalc= 1.61 - from Gladstone-Dale relationship (KC = 0.2171) where Ncalc=Dcalc*KC+1

Calculated Properties of Zaccagnaite

Electron Density:

r_electron=2.80 gm/cc
note: r_Zaccagnaite=2.82 gm/cc.

Fermion Index

Fermion Index = 0.01703
Boson Index = 0.98297

Photoelectric:

PE_Zaccagnaite= 19.89 barns/electron
U=PE_Zaccagnaite x r_electron= 55.64 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zaccagnaite is Not Radioactive

Zaccagnaite Classification

Dana Class:

16b.6.1.4 (16b)Carbonates - Hydroxyl or Halogen

(16b.6)Dana Type

(16b.6.1)Sjorgrenite-Hydrotalcite Group (Sojogrenite Subgroup:Hexagonal)

16b.6.1.1 Manasseite Mg6Al2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

16b.6.1.2 Barbertonite Mg6Cr2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

16b.6.1.3 Sjogrenite Mg6Fe2(CO3)(OH)14·5(H2O) P 6₃/mmc 6/m 2/m 2/m

16b.6.1.4 Zaccagnaite ! Zn4Al2(OH)12(CO3)·3(H2O) P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

V/E.02-09 V - Nitrates, Carbonates and Borates

V/E - Water-bearing carbonates with unfamiliar anions

V/E.02 - Manasseite group

V/E.02-05 Quintinite-2H Mg4Al2(OH)12CO3·4(H2O) P 6₃22 6 2 2

V/E.02-05* Quintinite-3T Mg4Al2(OH)12CO3·4(H2O) P 3₁12,P 3₂12 3 2

V/E.02-07 Caresite Fe4Al2(OH)12CO3·3(H2O) P 3₁12 or P 3₂12 3 2

V/E.02-08 Charmarite-2H Mn4Al2(CO3)(OH)12·3(H2O) P 6₃22 6 2 2

V/E.02-08* Charmarite-3T Mn4Al2(CO3)(OH)12·3(H2O) P 3₁12 3 2

V/E.02-09 Zaccagnaite Zn4Al2(OH)12(CO3)·3(H2O) P 6₃/mmc 6/m 2/m 2/m

V/E.02-10 Manasseite Mg6Al2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

V/E.02-20 Chlormagaluminite (Mg,Fe)4Al2(OH)12(Cl2,CO3)·2(H2O) P 6/mcm, P 6cm, P 6c2 Hex

V/E.02-30 Barbertonite Mg6Cr2(CO3)(OH)16·4(H2O) P 6₃/mmc 6/m 2/m 2/m

V/E.02-40 Sjogrenite Mg6Fe2(CO3)(OH)14·5(H2O) P 6₃/mmc 6/m 2/m 2/m

Other Zaccagnaite Information

References:

NAME( AmMin, Vol 86, p 1293-1301) PHYS. PROP.(AmMin, Vol 86, p 1293-1301) OPTIC PROP.(AmMin, Vol 86, p 1293-1301)

See Also:

Links to other databases for Zaccagnaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

Search for Zaccagnaite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Zaccagnaite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Zaccagnaite Mineral Data :

Ask about Zaccagnaite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Zaccagnaite

Zn4Al2(OH)12(CO3)·3(H2O)
Dana No: 16b.6.1.4 Strunz No: V/E.02-09
Locality:

Notes: