Mineralogy Database

Christelite Mineral Data

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General Christelite Information

Help on Chemical  Formula: Chemical Formula: Zn3Cu2(SO4)2(OH)6•4(H2O)
Help on Composition: Composition: Molecular Weight = 689.49 gm
   Zinc      28.45 %  Zn   35.41 % ZnO
   Copper    18.43 %  Cu   20.75 % Cu2O
   Hydrogen   2.05 %  H    18.29 % H2O
   Sulfur     9.30 %  S    23.22 % SO3
   Oxygen    41.77 %  O
            ______        ______ 
            100.00 %       97.68 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn3Cu2(SO4)2(OH)6•4(H2O)
Help on Environment: Environment: Presumably in a secondary assemblage.
Help on IMA Status: IMA Status: Approved IMA 1995 (Dana # Added)
Help on Locality: Locality: The San Francisco mine, Sierra Groda, northeast of Antofagasta, in the 2nd region of northern Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Mrs. Christel Gebhard-Giesen (1950- ) who discovered the mineral.
Help on Synonym: Synonym: ICSD 404835
  PDF 49-1865

Christelite Image

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  Christelite   Paratacamite

Comments: Robins-egg blue christelite with dark green paratacamite on matrix.
Location: San Francisco mine, Sierra Gorda, Chile. Scale: 3 cm.
© John Veevaert

Christelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8543:1:1.6527
Help on Cell Dimensions: Cell Dimensions: a = 5.415, b = 6.338, c = 10.475, Z = 1; alpha = 94.633°, beta = 90.216°, gamma = 90.667° V = 358.30 Den(Calc)= 3.20
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.23(1), 10.459(0.82), 3.486(0.54),

Physical Properties of Christelite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Greenish blue.
Help on Density: Density: 2.98 - 3.14, Average = 3.06
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: bright greenish blue

Optical Properties of Christelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.068 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1936,KPDmeas= 0.2025,KC= 0.2078
Ncalc = 1.62 - 1.66
Help on Optical Data: Optical Data: Biaxial (-), a=1.5977, b=1.6259, g=1.6354, bire=0.0377

Calculated Properties of Christelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.00 gm/cc
note: Specific Gravity of Christelite =3.06 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEChristelite = 22.42 barns/electron
U=PEChristelite x rElectron Density= 67.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Christelite is Not Radioactive

Christelite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.06)where (A+ B++)5 (XO4)2 Zq�x(H2O)
  (31.06.03)Dana Group Ktenasite (Cu,Zn)5(SO4)2(OH)6•6(H2O) P 21/c 2/m Christelite! Zn3Cu2(SO4)2(OH)6•4(H2O) P1 1
Help on  Strunz Class: Strunz Class: 07.DD.25 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DD -With only medium-sized cations; sheets of edge-sharing octahedra
07.DD.25 Christelite! Zn3Cu2(SO4)2(OH)6•4(H2O) P1 1

Other Christelite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Christelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 07.DD.25





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