Tschortnerite Mineral Data

Tschortnerite Mineral Data +

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General Tschortnerite Information

Chemical Formula:

Ca4(Ca,Sr,K,Ba)3Cu3(OH)8[Si12Al12O48]·x(H2O), x>=20

Composition:

Molecular Weight = 2,445.93 gm

Potassium 0.96 % K 1.16 % K₂O

Barium 1.68 % Ba 1.88 % BaO

Strontium 4.30 % Sr 5.08 % SrO

Calcium 8.03 % Ca 11.23 % CaO

Aluminum 13.24 % Al 25.01 % Al₂O₃

Copper 7.79 % Cu 8.78 % Cu₂O

Silicon 13.78 % Si 29.48 % SiO₂

Hydrogen 1.81 % H 16.20 % H₂O

Oxygen 48.41 % O

______ ______

100.00 % 98.82 % = TOTAL OXIDE

Empirical Formula:

Ca_4.9Sr_1.2K_0.6Ba_0.3Cu₃(OH)₈Si₁₂Al₁₂O₄₈·18(H₂O)

Environment:

Ca-rich xenolith in leucite tephrite lava.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

Bellberg volcano near Mayen, in the Laacher See volcano area, Eifel, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after Jochen Tschortner (1941-), mineral collector and finder of the mineral.

Synonym:

IMA1995-051

Tschortnerite Image

Images:

Tschortnerite

Comments: Scanning electron micrograph of tschortnerite. (AmMin 83:608).
Location: Ca-rich xenolith at the Bellberg volcano near Mayen, Eifel, Germany. Scale: Scale Bar 20 µm.
© American Mineralogist

Tschortnerite Crystallography

Cell Dimensions:

a = 31.62, Z = 16; V = 31,614.45 Den(Calc)= 2.06

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m

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

By Intensity(I/I_o): 18.34(1), 15.82(0.5), 9.69(0.05),

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Crystal Structure:

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Effenberger H , Giester G , Krause W , Bernhardt H J , American Mineralogist , 83 (1998) p.607-617, Tschortnerite, a copper-bearing zeolite from the Bellberg volcano, Eifel,, Germany

Physical Properties of Tschortnerite

Cleavage:

None

Color:

Light blue.

Density:

2.1

Diaphaniety:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

pale blue

Optical Properties of Tschortnerite

Gladstone-Dale:

CI meas= -0.07 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.091 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2447,KPDmeas= 0.24,KC= 0.2244

Optical Data:

Isotropic, n=1.504.

Calculated Properties of Tschortnerite

Electron Density:

r_electron=2.09 gm/cc
note: r_{Tschortnerite}=2.10 gm/cc.

Fermion Index

Fermion Index = 0.01279
Boson Index = 0.98721

Photoelectric:

PE_{Tschortnerite}= 16.68 barns/electron
U=PE_{Tschortnerite} x r_electron= 34.90 barns/cc.

Radioactivity:

GRapi = 13.81 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Tschortnerite - barely detectable

Tschortnerite Classification

Dana Class:

77.1.2.9 (77)Tectosilicate Zeolite group

(77.1)true zeolites

(77.1.2)Chabazite and related species

77.1.2.1 Chabazite-Ca (Ca0.5,Na,K)4[Al4Si8O24]·12H2O P1 1

77.1.2.1a Chabazite-Na! (Na2,K2,Ca,Mg)[Al2Si4O12]·6(H2O) R 3m 3 2/m

77.1.2.1b Chabazite-K! (K2,Ca,Na2,Mg)[Al2Si4O12]·6(H2O) R 3m 3 2/m

77.1.2.1c Chabazite-Sr! (Sr,Ca,K2,Na2)[Al2Si4O12]·6(H2O) R 3m 3 2/m

77.1.2.2 Herschelite? (Na,Ca,K)AlSi2O6·3(H2O) R 3m 3 2/m

77.1.2.3 Willhendersonite KCaAl3Si3O12·5(H2O) P1 1

77.1.2.4 Offretite (K2,Ca,Mg)2.5Al5Si13O36·15(H2O) P 6m2 6 m2

77.1.2.5 Erionite-Na (Na2,K2,Ca)2[Al4Si14O36]·15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.2.5a Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]·15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.2.5b Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]·15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.2.6 Gmelinite-Na (Na2,Ca)Al2Si4O12·6(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.2.6a Gmelinite-Ca! (Ca,Na2)Al2Si4O12·6(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.2.6b Gmelinite-K! (K,Na,Ca)6(Al7Si17O48)·22(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.2.7 Faujasite-Na (Na2,Ca,Mg)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

77.1.2.7a Faujasite-Ca! (Ca,Na2,Mg)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

77.1.2.7b Faujasite-Mg! (Mg,Na2,Ca)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

77.1.2.8 Levyne-Ca (Ca,Na2,K2)Al2Si4O12·6(H2O) R 3m 3 2/m

77.1.2.8a Levyne-Na! (Na2,Ca,K2)Al2Si4O12·6(H2O) R 3m 3 2/m

77.1.2.9 Tschortnerite ! Ca4(Ca,Sr,K,Ba)3Cu3(OH)8[Si12Al12O48]·x(H2O),x>=20 F m3m 4/m 3 2/m

Strunz Class:

VIII/J.20-30 VIII - Silicates

VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites

VIII/J.20 - Perhamite - Viseite series

VIII/J.20-10 Perhamite Ca3Al7(SiO4)3(PO4)4(OH)3·16.5(H2O) P 6/mmm 6/m 2/m 2/m

VIII/J.20-20 Viseite Ca10Al24(SiO4)6(PO4)7O22F3·72(H2O)(?) I a3d 4/m 3 2/m

VIII/J.20-30 Tschortnerite Ca4(Ca,Sr,K,Ba)3Cu3(OH)8[Si12Al12O48]·x(H2O),x>=20 F m3m 4/m 3 2/m

Other Tschortnerite Information

References:

NAME( AmMin) PHYS. PROP.(Am.Min.,Vol.83,p607-617,1998) OPTIC PROP.(AmMin)

See Also:

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

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Tschortnerite

Ca4(Ca,Sr,K,Ba)3Cu3(OH)8[Si12Al12O48]·x(H2O), x>=20
Dana No: 77.1.2.9 Strunz No: VIII/J.20-30
Locality:

Notes: