Zincrosasite Mineral Data

Zincrosasite Mineral Data +

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General Zincrosasite Information

Chemical Formula:

(Zn,Cu)2(CO3)(OH)2

Composition:

Molecular Weight = 223.42 gm

Zinc 36.58 % Zn 45.54 % ZnO

Copper 21.33 % Cu 26.70 % CuO

Hydrogen 0.90 % H 8.06 % H₂O

Carbon 5.38 % C 19.70 % CO₂

Oxygen 35.81 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn_1.25Cu_0.75(CO₃)(OH)₂

Environment:

An inadequately described species.

IMA Status:

Valid Species (Pre-IMA) 1959

Locality:

Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named as the zinc rich member of rosasite.

Zincrosasite Image

Images:

Zincrosasite

Comments: Spherical zincrosasite aggregates on limonite.
Location: Kali Kafi Mine, Anarak District, Great Salt Desert, Esfahan, Iran. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Zincrosasite Crystallography

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

Physical Properties of Zincrosasite

Cleavage:

[???] Good, [???] Good

Color:

White, White green, Light green.

Density:

4 - 4.2, Average = 4.09

Diaphaniety:

Transparent to Translucent

Fracture:

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

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Subadamantine

Streak:

white

Optical Properties of Zincrosasite

Gladstone-Dale:

CI meas= -0.1 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2049,KC= 0.1863

Optical Data:

Biaxial (?), b=1.84

Calculated Properties of Zincrosasite

Electron Density:

r_electron=3.94 gm/cc
note: r_Zincrosasite=4.10 gm/cc.

Fermion Index

Fermion Index = 0.01576
Boson Index = 0.98424

Photoelectric:

PE_Zincrosasite= 27.66 barns/electron
U=PE_Zincrosasite x r_electron= 108.89 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zincrosasite is Not Radioactive

Zincrosasite Classification

Dana Class:

16a.3.1.4 (16a)Carbonates - Hydroxyl or Halogen

(16a.3)where (A B)2 (XO3) Zq

(16a.3.1)Rosasite Group

16a.3.1.1 Rosasite (Cu,Zn)2(CO3)(OH)2 P 2₁/a 2/m

16a.3.1.2 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 2₁/a 2/m

16a.3.1.3 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri

16a.3.1.4 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 2₁/a 2/m

16a.3.1.5 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 2₁/a 2/m

Strunz Class:

V/C.01-90 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 Zincrosasite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Zincrosasite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Zincrosasite

(Zn,Cu)2(CO3)(OH)2
Dana No: 16a.3.1.4 Strunz No: V/C.01-90
Locality:

Notes: