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Karnasurtite-(Ce) (Karnasurtit-(Ce))

Pictures (1 Images total)

Honiggelbe plattige Partien von Karnasurtit-(Ce)
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Honiggelbe plattige Partien von Karnasurtit-(Ce)

(durch russische Mineralogen röntgenanalysiert; Bildbreite: 6 mm; Fundort: Karnasurt-Berg, Lovozero-Massiv, Kola-Halbinsel, Russland

Copyright: McSchuerf
Contribution: Mineralienatlas 2004-04-11
Locality: Karnasurt, Berg / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color Honiggelb bis zitronengelb (frisch); graugelb ( gealtert )
Streak color Gelblich
Lustre Matt bis Fettglanz
Hardness (Mohs) 2
Crystal System amorph,
Morphology Körner bis 1 cm Durchmesser; Aggregate aus plattigen Kristallen bis 10 x 6 x 2 cm; idiomorphe plattige

Chemism

Chem­ical formula

(Ce,La,Th)(Ti,Nb)(Al,Fe3+)(Si,P)2O7(OH)4·3H2O

Chem­ical com­po­si­tion

Aluminium, Cerium, Eisen, Lanthanum, Niob, Silicium, Thorium, Titan, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 533.95616675 u; Number of atoms in the formula: 29

Info

Empirical formula:

(Ce0.6La0.3Th0.1)(Ti0.75Nb0.25)(Al0.75Fe0.25)(Si0.75P0.25)2O7(OH)4·3H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.89

10

34.48

1.0079470

10.0794700

Oxygen

O

41.95

14

48.28

15.9994300

223.9920200

Aluminium

Al

3.79

0.75

2.59

26.9815382

20.2361537

Silicon

Si

7.89

1.5

5.17

28.0855300

42.1282950

Phosphorus

P

2.90

0.5

1.72

30.9737612

15.4868806

Titanium

Ti

6.72

0.75

2.59

47.8671000

35.9003250

Iron

Fe

2.61

0.25

0.86

55.8452000

13.9613000

Niobium

Nb

4.35

0.25

0.86

92.9063820

23.2265955

Lanthanum

La

7.80

0.3

1.03

138.9055200

41.6716560

Cerium

Ce

15.74

0.6

2.07

140.1161000

84.0696600

Thorium

Th

4.35

0.1

0.34

232.0381100

23.2038110

Anal­y­sis wt%

SiO2 : 24.91, P2O5 : 6.81, Al2O3 : 5.52, Fe2O3 : 1.07, MgO : 0.60, TiO2 : 12.33, ZrO2 : 1.20, Nb2O5 : 2.20, ThO2 : 6.04, Ce2O3 : 8.11, La2O3 : 8.55, CaO : 3.20, H2O : 19.58, Ln2O3 : 16.66 (Ref: American Mineralogist 60)

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.18-020

VIII: SILIKATE
C: Gruppensilikate
18: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F)

Clas­sifica­tion by Hölzel

9.BE.400

9: SILICATES
B: Sorosilicates
E: Cuspidine-Tilleyite-Group

Dana 8th edi­tion

52.04.09.07

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
04: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or > [6] coordination
09: Silicate apatites

Min­eral sta­tus

Mineralstatus fragwürdig

Optical Properties

Color

Honiggelb bis zitronengelb (frisch); graugelb ( gealtert )

Streak color

Gelblich

Lus­tre

Matt bis Fettglanz

max. Birefrin­gence

0.022

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

1.617

RI value γ / ε

1.595

Ri mean

1.610

2V angle

Uniaxial (-)

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz bekannt

Crystallography

Crystal Sys­tem

amorph

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

120°

X-Ray Pow­der Diffrac­tion

3.49(70),
3.29(90),
3.10(100),
2.88(100),
2.44(60),
2.14(60),
1.723(70)

XRD chart Karnasurtite-(Ce)

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

Morphol­ogy

Körner bis 1 cm Durchmesser; Aggregate aus plattigen Kristallen bis 10 x 6 x 2 cm; idiomorphe plattige

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2

VHN (Hard­ness Vick­ers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.89 - 2.95

Radioac­tiv­ity

sehr schwach, bedingt durch wechselnden Th-Gehalt (unbestätigt)

Preface

Occurrences

In einem zonar verteilten Alkalipegmatitstock am unteren SW-Abhang des Mt. Karnarsurt, Lovozero Massiv, Kola-Halbinsel, Russland

Asso­cia­tions

Natrolith, Epididymit, manganhaltiger Pektolith, Polylithionit

Rare­ness

selten

Author (Name, Year)

Kuz'menko & Kozhanov, 1959

Col­lector informa­tion

Ausgezeichnete idiomorphe dunkelgelbe Kristalle bis 3 cm mit Endflächen aus einem Probeschurf (Fund 1993)

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

Handbook of Mineralogy (Anthony et al.), 2 (1995), 401

Other languages

German

Karnasurtit-(Ce)

Spanish

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French

Karnasurtite-(Ce)

English

Karnasurtite-(Ce)

Russian

Карнасуртит-(Ce)

CNMNC symbol

Symbol

Ksu-Ce

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

German pages

DeWikiPedia - search for: Karnasurtit-(Ce)
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Mineralienatlas.de (Forum) - search for: Karnasurtit-(Ce)

English pages

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Handbook-of-Mineralogy - search for: Karnasurtite-(Ce)
RRUFF - Raman, XRD and other mineral data - search for: Karnasurtite-(Ce)
RRUFF - References and PDF downloads - search for: Karnasurtite-(Ce)
American-Mineralogist-Crystal-Structure-Database - search for: Karnasurtite-(Ce)
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Russian pages

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Mineral Dealer

German pages

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