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Kircherite

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Kircherit
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Kircherit
Bildbreite: 0,7 mm, Fundort: Biachella-Tal, Sacrofano, Latium, Italien
Copyright: Luigi Mattei; Contribution: thdun5
Location: Italien/Latium (Lazio), Region/Rom, Provinz/Sacrofano/Sacrofano-Caldera/Biachella-Tal
Mineral: Kircherite
Image: 1276883350
Rating: 6 (votes: 3)
License: Usage for Mineralienatlas project only
Kircherit

Bildbreite: 0,7 mm, Fundort: Biachella-Tal, Sacrofano, Latium, Italien

Copyright: Luigi Mattei
Contribution: thdun5 2010-06-18
Locality: Biachella-Tal / Sacrofano-Caldera / Sacrofano / Rom, Provinz / Latium (Lazio), Region / Italien

Collectors Summary

Color farblos, leicht grau
Streak color weiß
Hardness (Mohs) 5.5
Cleavages gut {00.1}, keine Teilbarkeit beobachtet
Fracture uneben
Crystal System trigonal, R32

Chemism

Chemical formula

[Na90Ca36K18](Si108Al108O432)(SO4)36·6H2O

Empirical formula (analysis)

(Na89.09Ca31.63K18.85Fe0.20Mn0.06Mg0.05Ti0.03)Σ139.91[(Si108.13Al107.87)Σ216.00O430.00](SO4)32.58Cl2.00F0.53⋅6.86H2O

Additional chem. information

CNMNC: [Na5Ca2K](Si6Al6O24)(SO4)2·0.33H2O

Chemical composition

Aluminium, Calcium, Natrium, Silicium, Kalium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 20125.830521468 u; Number of atoms in the formula: 954.34

Info

Empirical formula:

(Na89.09Ca31.63K18.85Fe0.20Mn0.06Mg0.05Ti0.03)[(Si108.13Al107.87)O430.00](SO4)32.58Cl2.00F0.53⋅6.86H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.01

2

0.21

1.0079470

2.0158940

Oxygen

O

44.62

561.32

58.82

15.9994300

8,980.8000476

Fluorine

F

0.05

0.53

0.06

18.9984033

10.0691537

Sodium

Na

10.18

89.09

9.34

22.9897702

2,048.1586271

Magnesium

Mg

0.01

0.05

0.01

24.3050600

1.2152530

Aluminium

Al

14.46

107.87

11.30

26.9815382

2,910.4985256

Silicon

Si

15.09

108.13

11.33

28.0855300

3,036.8883589

Sulfur

S

5.19

32.58

3.41

32.0655000

1,044.6939900

Chlorine

Cl

0.35

2

0.21

35.4532000

70.9064000

Potassium

K

3.66

18.85

1.98

39.0983100

737.0031435

Calcium

Ca

6.30

31.63

3.31

40.0784000

1,267.6797920

Titanium

Ti

0.01

0.03

0.00

47.8671000

1.4360130

Manganese

Mn

0.02

0.06

0.01

54.9380499

3.2962830

Iron

Fe

0.06

0.2

0.02

55.8452000

11.1690400

Analysis wt%

SiO2 : 31.44, SO3 : 13.96, Al2O3 : 26.68, CaO : 9.78, Na2O : 13.51, K2O : 4.11, H2O : 0.52 (Ref: berechnet)

Strunz 9th edition incl. updates

9.FB.05

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
B: Gerüstsilikate (Tektosilicates) mit weiteren [Anionen]
05:Cancrinit-Gruppe

Lapis Classification

VIII/J.09-035

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
9: Mit tetraederfremden Anionen; Cancrinit-Gruppe

Classification by Hölzel

9.FE.780

9: SILICATES
F: Tektosilicates
E: Hexagonal or trigonal with other Anions
7: Giuseppettite-Group - trigonal, axis a~~12A and c=n*~~5A, n>5

IMA status

anerkannt - IMA Web-Seite Jan. 2010

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, leicht grau

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.008

Birefringence chart\! Kircherite title=Birefringence chart Kircherite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

ω = 1.510(2)

RI value γ / ε

ε = 1.502(2)

2V angle

Uniaxial (-)

Optical Data Luminescence

Luminescence

hellrosaunter LW-UV und tiefrot unter KW-UV

Crystallography

Crystal System

trigonal

Class (H-M)

32

Space Group number

155

Space Group

R32

Cell parameters a (Å)

12.877

Cell parameters b (Å)

-

Cell parameters c (Å)

95.244

Cell parameters a/b or c/a

7.396

Cell parameters c/b

-

Z

1

Volume (ų)

13677.214

X-Ray Powder Diffraction

3.80(52), 3.72(100), 3.60(53), 3.58(60), 3.55(24), 3.23(65), 3.22(38), 2.65(100)

XRD chart Kircherite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

648.4 ± 107 (10g)

Density (g/cm³)

2.420 (berechnet)

2.443 ( ρ calc. Mineralienatlas )

Cleavages

gut {00.1}, keine Teilbarkeit beobachtet

Fracture

uneben

Tenacity

spröde

Preface

Author (Name, Year)

Fabio Bellatreccia, 2009

References

Neue Mineralien - IMA Web-Seite Jan. 2010

Bellatreccia, F., Cámara, F., Della Ventura, G., Gunter, M.E., Cavallo, A., Sebastiani, M. (2009): Kircherite, a new cancrinite-sodalite group mineral from Sacrofano (Rome, Italy). HP-HT Laboratory of Experimental Volcanology and Geophysics, 2009 Annual Report, 2009, Report I 38.

Kircherite, a new mineral of the cancrinite-sodalite group with a 36-layer stacking sequence: Occurrence and crystal structure - American Mineralogist, Volume 97, pages 1494–1504, 2012

Other languages

German

Kircherit

Spanish

Kircherita

English

Kircherite

French

Kircherite

CNMNC (IMA)-Number

IMA 2009-084

CNMNC symbol

Symbol

Kcr

IDs

GUSID (Global unique identifier short form) Ou0FXiblaEyUMuPaqiDUDQ
GUID (Global unique identifier) 5E05ED3A-E526-4C68-9432-E3DAAA20D40D
Database ID 6867