Hydrozincite Mineral Data

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.

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, Mapim?, Mun. de Mapim?, 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

Diaphaniety:

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:

None.

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

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:

r_electron=3.37 gm/cc
note: r_Hydrozincite=3.50 gm/cc.

Fermion Index

Fermion Index = 0.02506
Boson Index = 0.97494

Photoelectric:

PE_Hydrozincite= 29.69 barns/electron
U=PE_Hydrozincite x r_electron= 99.92 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hydrozincite is Not Radioactive

Hydrozincite Classification

Dana Class:

16a.4.1.1 (16a)Carbonates - Hydroxyl or Halogen

(16a.4)where (A B)5 (XO3)2 Zq

(16a.4.1)Dana Group

16a.4.1.1 Hydrozincite Zn5(CO3)2(OH)6 C 2/m 2/m

Strunz Class:

V/C.01-100 V - Nitrates, Carbonates and Borates

V/C - Waterfree carbonates with unfamiliar anions

V/C.01 - Azurite - Rosasite group and related compounds

V/C.01-10 Azurite Cu3(CO3)2(OH)2 P 2₁/a 2/m

V/C.01-20 Malachite Cu2(CO3)(OH)2 P 2₁/a 2/m

V/C.01-25 Georgeite Cu5(CO3)3(OH)4·6(H2O) None

V/C.01-30 Pokrovskite Mg2(CO3)(OH)2·0.5(H2O) P 2₁/a 2/m

V/C.01-40 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 2₁/a 2/m

V/C.01-50 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri

V/C.01-60 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 2₁/a 2/m

V/C.01-70 Nullaginite Ni2(CO3)(OH)2 P 2₁/m,P 2₁ Mono

V/C.01-80 Rosasite (Cu,Zn)2(CO3)(OH)2 P 2₁/a 2/m

V/C.01-90 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 2₁/a 2/m

V/C.01-100 Hydrozincite Zn5(CO3)2(OH)6 C 2/m 2/m

V/C.01-105 Brianyoungite Zn3(CO3,SO4)(OH)4 C 2/m 2/m

V/C.01-110 Aurichalcite (Zn,Cu)5(CO3)2(OH)6 P 2₁/m 2/m

V/C.01-120 Loseyite (Mn,Zn)7(CO3)2(OH)10 A2/a 2/m

V/C.01-130 Sclarite (Zn,Mg,Mn)4Zn3(CO3)2(OH)10 A2/a 2/m

Other Hydrozincite Information

References:

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

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Hydrozincite

Zn5(CO3)2(OH)6
Dana No: 16a.4.1.1 Strunz No: V/C.01-100
Locality:

Notes: