Hydrozincite Mineral Data

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General Hydrozincite Information

Chemical Formula:

Zn5(CO3)2(OH)6

Composition:

Molecular Weight = 549.01 gm

Zinc 59.55 % Zn 74.12 % ZnO

Hydrogen 1.10 % H 9.84 % H₂O

Carbon 4.38 % C 16.03 % CO₂

Oxygen 34.97 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn₅(CO₃)₂(OH)₆

Environment:

Secondary mineral in the oxidized portions of zinc deposits.

IMA Status:

Valid Species (Pre-IMA) 1853

Locality:

Bleiberg, in Carinthia, Austria. Link to MinDat.org Location Data.

Name Origin:

Named after its chemical composition.

Name Pronunciation:

Hydrozincite + Pronunciation

Synonym:

Marionite

Zinc Bloom

Hydrozincite Image

Images:

Hydrozincite

Comments: Well crystallized, colorless hydrozincite crystals encrusting a limonitic gossan matrix. Fluoresces bright blue-white under UV illumination.
Location: Ojuela mine, Mapimí, Mun. de Mapimí, Durango, Mexico. Scale: 3x3x2 cm.
© John Betts - Fine Minerals

Hydrozincite Crystallography

Axial Ratios:

a:b:c =2.1327:1:0.8493

Cell Dimensions:

a = 13.479, b = 6.32, c = 5.368, Z = 2; beta = 95.6° V = 455.10 Den(Calc)= 4.01

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 6.66(1), 2.72(0.7), 3.14(0.5),

Crystal Structure:

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Ghose S , Acta Crystallographica , 17 (1964) p.1051-1057, The crystal structure of hydrozincite, Zn5(OH)6(CO3)2, Locality: Goodsprings, Nevada, USA

Physical Properties of Hydrozincite

Cleavage:

{100} Perfect

Color:

White, Yellowish white, Grayish white, Pinkish white, Bluish white.

Density:

3.2 - 3.8, Average = 3.5

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Habit:

Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Fluorescent, Short UV=blue white, Long UV=blue white.

Luster:

Pearly

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Hydrozincite

Gladstone-Dale:

CI meas= -0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.089 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1681,KPDmeas= 0.1926,KC= 0.1844
Ncalc = 1.59 - 1.74

Optical Data:

Biaxial (-), a=1.63, b=1.642, g=1.75, bire=0.1200, 2V(Calc)=40, 2V(Meas)=40. Dispersion relatively strong.

Calculated Properties of Hydrozincite

Electron Density:

Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Hydrozincite =3.50 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Hydrozincite= 29.69 barns/electron
U=PE_Hydrozincite x rElectron Density= 99.92 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hydrozincite is Not Radioactive

Hydrozincite Classification

Dana Class:

16a.04.01.01 (16a)Carbonates - Hydroxyl or Halogen

(16a.04)where (A B)5 (XO3)2 Zq

(16a.04.01)Dana Group

16a.04.01.01 Hydrozincite Zn5(CO3)2(OH)6 C 2/m 2/m

Strunz Class:

05.BA.15 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BA -With Cu, Co, Ni, Zn, Mg, Mn

05.BA.15 Aurichalcite (Zn,Cu)5(CO3)2(OH)6 P 2₁/m 2/m

05.BA.15 Hydrozincite Zn5(CO3)2(OH)6 C 2/m 2/m

Other Hydrozincite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Hydrozincite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - Franklin Minerals(Palache)
10 - GeoScienceWorld
11 - Google Images
12 - Google Scholar
13 - Handbook of Mineralogy (MinSocAm)
14 - Handbook of Mineralogy (UofA)
15 - MinDAT
16 - Mineral and Gemstone Kingdom
17 - Mineralienatlas (Deutsch)
18 - Online Mineral Museum
19 - QUT Mineral Atlas
20 - Ruff.Info
21 - WWW-MINCRYST

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Ask about Hydrozincite 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 Hydrozincite Specimen Label here :

Hydrozincite

Zn5(CO3)2(OH)6
Dana No: 16a.04.01.01 Strunz No: 05.BA.15
Locality:

Notes: