Christelite Mineral Data

Christelite Mineral Data

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General Christelite Information

Chemical Formula:

Zn3Cu2(SO4)2(OH)6·4(H2O)

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

Empirical Formula:

Zn₃Cu₂(SO₄)₂(OH)₆·4(H₂O)

Environment:

Presumably in a secondary assemblage.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

The San Francisco mine, Sierra Groda, northeast of Antofagasta, in the 2nd region of northern Chile. Link to MinDat.org Location Data.

Name Origin:

Named after Mrs. Christel Gebhard-Giesen (1950- ) who discovered the mineral.

Synonym:

ICSD 404835

IMA1995-030

PDF 49-1865

Christelite Image

Images:

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

Axial Ratios:

a:b:c =0.8543:1:1.6527

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

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 5.23(1), 10.459(0.82), 3.486(0.54),

Physical Properties of Christelite

Cleavage:

[001] Perfect

Color:

Greenish blue.

Density:

2.98 - 3.14, Average = 3.06

Diaphaniety:

Transparent

Habit:

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

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous (Glassy)

Streak:

bright greenish blue

Optical Properties of Christelite

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

Optical Data:

Biaxial (-), a=1.5977, b=1.6259, g=1.6354, bire=0.0377

Calculated Properties of Christelite

Electron Density:

r_electron=3.00 gm/cc
note: r_Christelite=3.06 gm/cc.

Fermion Index

Fermion Index = 0.01256
Boson Index = 0.98744

Photoelectric:

PE_Christelite= 22.42 barns/electron
U=PE_Christelite x r_electron= 67.28 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Christelite is Not Radioactive

Christelite Classification

Dana Class:

31.6.3.2 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.6)where (A+ B++)5 (XO4)2 Zq·x(H2O)

(31.6.3)Dana Group

31.6.3.1 Ktenasite (Cu,Zn)5(SO4)2(OH)6·6(H2O) P 2₁/c 2/m

31.6.3.2 Christelite ! Zn3Cu2(SO4)2(OH)6·4(H2O) P1 1

Strunz Class:

VI/D.03-65 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.03 - Langite series, Posnjakite - Nakuriite

VI/D.03-10 Posnjakite Cu4(SO4)(OH)6·(H2O) C 2/c 2/m

VI/D.03-20 Langite Cu4(SO4)(OH)6·2(H2O) Pc m

VI/D.03-30 Wroewolfeite Cu4(SO4)(OH)6·2(H2O) Pc m

VI/D.03-40 Namuwite (Zn,Cu)4(SO4)(OH)6·4(H2O) Unk Hex

VI/D.03-50 Guarinoite (Zn,Co,Ni)6(SO4)(OH,Cl)10·5(H2O) P 6₃/m,P 6₃, or P 6₃22 Hex

VI/D.03-55 Theresemagnanite (Co,Zn,Ni)6(SO4)(OH,Cl)10·8(H2O) P 6₃ 6

VI/D.03-60 Schulenbergite (Cu,Zn)7(SO4,CO3)2(OH)10·3(H2O) P 3 or P 3- Trig

VI/D.03-65 Christelite Zn3Cu2(SO4)2(OH)6·4(H2O) P1 1

VI/D.03-70 Ktenasite (Cu,Zn)5(SO4)2(OH)6·6(H2O) P 2₁/c 2/m

VI/D.03-75 Ramsbeckite (Cu,Zn)15(SO4)4(OH)22·6(H2O) P 2₁/a 2/m

VI/D.03-80 Campigliaite Cu4Mn(SO4)2(OH)6·4(H2O) C 2 2

VI/D.03-90 Nakauriite (Mn,Ni,Cu)8(SO4)4(CO3)(OH)6·48(H2O) Unk Ortho

Other Christelite Information

References:

NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Christelite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Translate Christelite Mineral Data :

Ask about Christelite here :
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Print or Cut-and-Paste your Christelite Specimen Label here :

Christelite

Zn3Cu2(SO4)2(OH)6·4(H2O)
Dana No: 31.6.3.2 Strunz No: VI/D.03-65
Locality:

Notes: