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Zaccagnaite (Zaccagnait)

Pictures (1 Images total)

Zaccagnait mit Zinkwoodwardit
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Zaccagnait mit Zinkwoodwardit
enge Verwachsung von weißem Zaccagnait mit Zinkwoodwardit, Kamariza Gruben, Lavrion, Griechenland; BB < 2 mm, analysiert
Copyright: mintreasure.com; Contribution: openpit
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Agios Konstantinos (Kamariza)/Kamariza Minen (Kamareza)
Mineral: Zaccagnaite
Image: 1671564812
License: Usage for Mineralienatlas project only
Zaccagnait mit Zinkwoodwardit

enge Verwachsung von weißem Zaccagnait mit Zinkwoodwardit, Kamariza Gruben, Lavrion, Griechenland; BB < 2 mm, analysiert
Copyright: mintreasure.com
Contribution: openpit 2022-12-20
Locality: Kamariza Minen (Kamareza) / Agios Konstantinos (Kamariza) / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland

Collectors Summary

Color weiß
Streak color weiß
Lustre teiweise Glasglanz
Hardness (Mohs) 2
Cleavages vollkommen (001)
Solubility +++ Säuren
Crystal System hexagonal, P63/mmc

Chemism

Chemical formula

Zn4Al2(OH)12(CO3)·3H2O

Additional chem. information

Hydrotalcit Gruppe

Chemical composition

Aluminium, Zink, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 633.7442424 u; Number of atoms in the formula: 43

Info

Empirical formula:

Zn4Al2(OH)12(CO3)·3H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.86

18

41.86

1.0079470

18.1430460
Carbon

C

1.90

1

2.33

12.0107800

12.0107800
Oxygen

O

45.44

18

41.86

15.9994300

287.9897400
Aluminium

Al

8.51

2

4.65

26.9815382

53.9630764
Zinc

Zn

41.28

4

9.30

65.4094000

261.6376000

Strunz 9th edition incl. updates

5.DA.45

5: Carbonate (Carbonate, Nitrate)
D: Carbonate mit weitere Anionen, mit H2O
A: Mit mittelgroßen [Kationen]
45:Manasseit-Gruppe

Lapis Classification

V/E.02-009

V: NITRATE, CARBONATE UND BORATE
E: Wasserhaltige Carbonate, mit fremden Anionen
2: Manasseit-Gruppe

Classification by Hölzel

5.DD.110

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
D: Carbonates (+Anions +Water)
D: Hydrotalcite Series
1: Chlormagaluminite-Group

Dana 8th edition

16b.06.01.04

16b: Carbonates - Hydroxyl or Halogen
06: Carbonates - Hydroxyl or Halogen
01: Sjorgrenite-Hydrotalcite Group (Sojogrenite Subgroup:Hexagonal)

IMA status

anerkannt 1997

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Hydrotalcite Supergroup  ⇒ Quintinite Group

Optical Properties

Color

weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

teiweise Glasglanz

RI value α / ω / n

1.613

Ri mean

1.613

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Class (H-M)

6/mmm

Space Group number

194

Space Group

P63/mmc

Cell parameters a (Å)

3.073

Cell parameters b (Å)

-

Cell parameters c (Å)

15.114

Cell parameters a/b or c/a

4.918

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

0.33

Volume (ų)

123.605

X-Ray Powder Diffraction

7.51(100),
3.794(50),
2.65(20),
2.511(30),
2.175(30),
1.830(30),
1.542(80),
1.539(80)
XRD chart Zaccagnaite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Polytypes

Zaccagnaite-3R

(Zn0.6Al0.4)(OH)2(CO3)0.2·0.5H2O

trigonal

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2

Density (g/cm³)

2.84 (berechnet)

2.809 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen (001)

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Italien/Toskana (Toscana)/Massa-Carrara, Provinz/Carrara/Colonnata Basin/Calagio

Preface

Name from

Domenico Zaccagna (1851-1940)

Author (Name, Year)

Merlino & Orlandi, 1996

References

American Mineralogist 86 (2001), 1301

IMA group assignments

Other languages

German

Zaccagnait

English

Zaccagnaite

French

Zaccagnaite

Spanish

Zaccagnaíta

Russian

Дзаккагнаит

Alternative Name

German

Zaccagnait-2H

Zaccagnaite-3R, a new Zn-Al hydrotalcite polytype from El Soplao cave (Cantabria, Spain) American Mineralogist, April 2012, v. 97, p. 513-523

English

Zaccagnaite-2H

Zaccagnaite-3R, a new Zn-Al hydrotalcite polytype from El Soplao cave (Cantabria, Spain) American Mineralogist, April 2012, v. 97, p. 513-523

CNMNC (IMA)-Number

IMA 1997-019

CNMNC symbol

Symbol

Zac

Locations with GPS information

IDs

GUSID (Global unique identifier short form) ZFrPG3F3BEat9vLRrnpvsA
GUID (Global unique identifier) 1BCF5A64-7771-4604-ADF6-F2D1AE7A6FB0
Database ID 4255