Mineralogy Database

Rosasite Mineral Data

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General Rosasite Information

Help on Chemical  Formula: Chemical Formula: (Cu,Zn)2(CO3)(OH)2
Help on Composition: Composition: Molecular Weight = 222.04 gm
   Zinc      14.72 %  Zn   18.33 % ZnO
   Copper    42.93 %  Cu   53.74 % CuO
   Hydrogen   0.91 %  H     8.11 % H2O
   Carbon     5.41 %  C    19.82 % CO2
   Oxygen    36.03 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu1.5Zn0.5(CO3)(OH)2
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1908
Help on Locality: Locality: Rosas mine, Narcao, Cagliari, Sardegna (Sardinia), Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Rosasite Say ROSASITE
 

Rosasite Image

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  Rosasite

Comments: Rosasite on malachite after azurite. Blocky crystals of azurite to 2.5 cm in size, completely altered to malachite, then coated by pale sky-blue rosasite.
Location: Silver Bill mine, Gleeson, Cochise Co., Arizona, USA. Scale: 4 x 7.5 x 2 cm.
© Dan Weinrich

Rosasite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3762:1:0.3373
Help on Cell Dimensions: Cell Dimensions: a = 12.873, b = 9.354, c = 3.156, Z = 4; beta = 110.36° V = 356.28 Den(Calc)= 4.14
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.708(1), 5.094(0.8), 2.601(0.7),
 

Physical Properties of Rosasite

Help on Cleavage: Cleavage: {010} Perfect, {100} Perfect
Help on Color: Color: Blue green, Light blue, Sky blue.
Help on Density: Density: 4 - 4.2, Average = 4.09
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: light blue
 

Optical Properties of Rosasite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1877,KPDmeas= 0.1895,KC= 0.1897
Ncalc = 1.76 - 1.8
Help on Optical Data: Optical Data: Biaxial (-), a=1.672, b=1.829, g=1.83, bire=0.1580, 2V(Calc)=8, 2V(Meas)=0-5.
 

Calculated Properties of Rosasite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.93 gm/cc
note: Specific Gravity of Rosasite =4.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0068065726
Boson Index = 0.9931934274
Help on Photoelectric: Photoelectric: PERosasite = 26.27 barns/electron
U=PERosasite x rElectron Density= 103.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rosasite is Not Radioactive
 

Rosasite Classification

Help on  Dana Class: Dana Class: 16a.03.01.01 (16a)Carbonates - Hydroxyl or Halogen
  (16a.03)where (A B)2 (XO3) Zq
  (16a.03.01)Rosasite Group
 
16a.03.01.01 Rosasite (Cu,Zn)2(CO3)(OH)2 P 21/a 2/m
 
16a.03.01.02 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 21/a 2/m
 
16a.03.01.03 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri
 
16a.03.01.04 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 21/a 2/m
 
16a.03.01.05 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 21/a 2/m
Help on  Strunz Class: Strunz Class: 05.BA.10 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BA -With Cu, Co, Ni, Zn, Mg, Mn
 
05.BA.10 Nullaginite Ni2(CO3)(OH)2 P 21/m,P 21 Mono
 
05.BA.10 Georgeite Cu5(CO3)3(OH)4•6(H2O) None
 
05.BA.10 Malachite Cu2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 21/a 2/m
 
05.BA.10 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri
 
05.BA.10 Pokrovskite Mg2(CO3)(OH)2•0.5(H2O) P 21/a 2/m
 
05.BA.10 Rosasite (Cu,Zn)2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 21/a 2/m
 
05.BA.10 Chukanovite! Fe2(CO3)(OH)2 P 21/a 2/m
 

Other Rosasite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Rosasite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - YupRocks

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Rosasite

(Cu,Zn)2(CO3)(OH)2
Dana No: 16a.03.01.01 Strunz No: 05.BA.10
Locality:

 

Notes:

 

 
   
 


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