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Chevkinite-(Ce)

Pictures (21 Images total)

Chevkinit
Views (Image: 1204098873): 4115
Chevkinit

Bildbreite: 3 mm; Fundort: Fundort: Laacher See Vulkangebiet, Eifel, Rheinland-Pfalz, Deutschland

Copyright: Stephan Wolfsried
Contribution: Hg 2008-02-27
Locality: Laacher See / Brohltal, Verbandsgem. / Ahrweiler, Landkreis / Rheinland-Pfalz / Deutschland
Chevkinit-(Ce)
Views (Image: 1217276249): 1567
Chevkinit-(Ce)

Bildbreite: 6 mm; Fundort: Midtmoen, Surka, Oståsen-Hadeland, Oppland, Norwegen

Copyright: Leonardus
Contribution: slugslayer 2008-07-28
Locality: Midtmoen / Surka / Lunner / Viken, Provinz / Norwegen
Chevkinit-(Ce)
Views (Image: 1174038653): 1464
Chevkinit-(Ce)

Bildbreite: 2 mm; Fundort Laacher See-Vulkangebiet, Eifel, Deutschland

Copyright: Stephan Wolfsried
Contribution: Hg 2007-03-16
Locality: Laacher See / Brohltal, Verbandsgem. / Ahrweiler, Landkreis / Rheinland-Pfalz / Deutschland
frischer, glasiger Chevkinit-(Ce)
Views (Image: 1243368793): 1645
frischer, glasiger Chevkinit-(Ce)

Größe: 70x70x25 mm; Fundort: Vishnevye, Tscheljabinsk, Ural, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-05-26
Locality: Vishnevye-Gebirge / Tscheljabinsk, Oblast / Ural, Föderationskreis / Russland
Chevkinit-(Ce)
Views (Image: 1264033185): 1374
Chevkinit-(Ce)

Größe: 90x80 mm; Fundort: Ambatofinandrahana, Fianarantsoa, Madagaskar

Copyright: Paul Bongaerts
Contribution: slugslayer 2010-01-21
Locality: Ambatofinandrahana, Distrikt / Amoron'i Mania, Region / Madagaskar
Chevkinit-(Ce)
Views (Image: 1265762082): 652
Chevkinit-(Ce)

Kristallgröße: 11x11 mm; Fundort: Satil, Tangir-Tal, Diamir-Distrikt, Nordgebiete, Pakistan

Copyright: Aletsch
Contribution: slugslayer 2010-02-10
Locality: Satil / Tangir-Tal / Diamir, Distrikt / Gilgit-Baltistan (Nordgebiete; Northern Areas) / Pakistan

Collectors Summary

Color braunschwarz
Streak color braun
Hardness (Mohs) 5.00 - 6.00
Solubility +++ warme HNO3, + HCl
Crystal System monoklin, C2/m

Chemism

Chem­ical formula

(Ce,La,Ca,Na,Th)4(Fe2+,Mg)2(Ti,Fe3+)3Si4O22

Chem­ical com­po­si­tion

Calcium, Cerium, Eisen, Lanthanum, Magnesium, Natrium, Silicium, Thorium, Titan, Sauerstoff

Unit weight: 1224.03266104 u; Number of atoms in the formula: 35

Info

Empirical formula:

(Ce0.55La0.25Ca0.1Na0.05Th0.05)4(Fe0.75Mg0.25)2(Ti0.75Fe0.25)3Si4O22

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

28.76

22

62.86

15.9994300

351.9874600

Sodium

Na

0.38

0.2

0.57

22.9897702

4.5979540

Magnesium

Mg

0.99

0.5

1.43

24.3050600

12.1525300

Silicon

Si

9.18

4

11.43

28.0855300

112.3421200

Calcium

Ca

1.31

0.4

1.14

40.0784000

16.0313600

Titanium

Ti

8.80

2.25

6.43

47.8671000

107.7009750

Iron

Fe

10.27

2.25

6.43

55.8452000

125.6517000

Lanthanum

La

11.35

1

2.86

138.9055200

138.9055200

Cerium

Ce

25.18

2.2

6.29

140.1161000

308.2554200

Thorium

Th

3.79

0.2

0.57

232.0381100

46.4076220

Strunz 9th edi­tion incl. updates

9.BE.70

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination
70:Chevkinit-Gruppe

Lapis Clas­sifica­tion

VIII/C.17-025

VIII: SILIKATE
C: Gruppensilikate
17: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F); Chevkinit-Reihe

Clas­sifica­tion by Hölzel

9.BK.120

9: SILICATES
B: Sorosilicates
K: Perrierite-Group

Dana 8th edi­tion

56.02.08.01

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
02: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with cations in [4] and/or >[4] coordination
08: Perierite - Chevkinite group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Chevkinite group  ⇒ Chevkinite subgroup

Optical Properties

Color

braunschwarz

Streak color

braun

max. Birefrin­gence

0.08~

Birefringence chart\! Chevkinite-(Ce) title=Birefringence chart Chevkinite-(Ce)

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

1.97

RI value β

2.02

RI value γ / ε

2.05

Ri mean

2.013

2V angle

Biaxial (-) 70°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

13.461

Cell param­e­ters b (Å)

5.676

Cell param­e­ters c (Å)

11.352

Cell param­e­ters a/b or c/a

2.372

Cell param­e­ters c/b

2.000

Cell param­e­ters α

90°

Cell param­e­ters β

100.87

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

851.783

X-Ray Pow­der Diffrac­tion

4.61(30),
3.19(80),
3.15(80),
2.876(70),
2.758(50),
2.721(100),
2.175(30),
1.977(30)

XRD chart Chevkinite-(Ce)

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)

5.00 - 6.00

VHN (Hard­ness Vick­ers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.88 (berechnet)

4.772 ( ρ calc. Mineralienatlas )

Tenac­ity

Kristalle sind elastisch und belastbar

Radioac­tiv­ity

Durch den Gehalt von Thorium radioaktiv, verglichen mit anderen rad. Mineralen jedoch gering.

Insta­bil­ity

+++ warme HNO3, + HCl

Preface

Name from

Benannt nach K. V. Chevkin (1802–75), Chef des Bergbauingenieur-Korps in St. Petrersburg; in der älteren Literatur auch Tscheffkinit genannt.

Author (Name, Year)

Rose, 1839

Safety Instructions

Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. These hazard statements refer to the classification of industrially used chemical compounds that may also occur in this natural mineral. The hazard classification makes no claim to completeness.




Safety classes: Ionizing radiation: Radioaktiv

References

Canadian Mineralogist 42 (2004), 1013

R. Macdonald, B. Bagiński, P. M. Kartashov, D. Zozulya and P. Dzierżanowski - Chevkinite-group minerals from Russia and Mongolia: new compositional data from metasomatites and ore deposits - Mineralogical Magazine, June 2012, Vol. 76(3), pp. 535–549 http://rruff.info/uploads/MM76_535.pdf

IMA group assignments

Other languages

German

Chevkinit-(Ce)

Spanish

Chevkinita-(Ce)

French

Chevkinite-(Ce)

English

Chevkinite-(Ce)

Russian

Чевкинит-(Ce)

Traditional Chinese

矽鈦鈰鐵礦

Simplified Chinese

硅钛铈铁矿

Alternative Name

Tscheffkinite-(Ce)

Traditional Chinese

矽鈦酸鈰釔礦

Traditional Chinese

矽鈦鈰釔礦

Traditional Chinese

矽鈰鈦礦

Simplified Chinese

硅钛酸铈钇矿

Simplified Chinese

硅钛铈矿

Simplified Chinese

硅钛铈钇矿

CNMNC symbol

Symbol

Cvk-Ce

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Chevkinit-(Ce)
Google-Bilder-Suche - search for: Chevkinit-(Ce)
Mineralienatlas.de (Forum) - search for: Chevkinit-(Ce)

English pages

Mindat - search for: Chevkinite-(Ce)
Webmineral - search for:Chevkinite-(Ce)
Handbook-of-Mineralogy - search for: Chevkinite-(Ce)
RRUFF - Raman, XRD and other mineral data - search for: Chevkinite-(Ce)
RRUFF - References and PDF downloads - search for: Chevkinite-(Ce)
American-Mineralogist-Crystal-Structure-Database - search for: Chevkinite-(Ce)
Strahlen.org - search for: Chevkinite-(Ce)

Russian pages

Webmineral.ru - search for: Чевкинит-(Ce)

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Chevkinit-(Ce)
Crystal-Treasure.com - search for: Chevkinit-(Ce)
Bosse - search for: Chevkinit-(Ce)
Edelsteine Neuburg - Gundolf Fischer - search for: Chevkinit-(Ce)

Locations with GPS information