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Ferricerite-(La)

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Cerit-(La)
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Cerit-(La)

Bildbreite: 1,2 cm, Fundort: Hackman-Tal, Yukspor, Khibiny, Kola-Halbinsel, Murmansk, Russland

Copyright: Pavel M. Kartashov
Contribution: thdun5 2013-02-12
Locality: Hackman-Tal / Yukspor / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color hellgelb, orange, rosabraun
Streak color weiß
Hardness (Mohs) 5
Cleavages keine
Fracture muschelig
Crystal System trigonal, R3c

Chemism

Chem­ical formula

(La,Ce,Ca)9Fe3+(SiO4)3(SiO3OH)4(OH)3

Chem­ical com­po­si­tion

Calcium, Cerium, Eisen, Lanthanum, Silicium, Sauerstoff, Wasserstoff

Unit weight: 1919.955707 u; Number of atoms in the formula: 55

Info

Empirical formula:

(La0.6Ce0.3Ca0.1)9Fe(SiO4)3(SiO3OH)4(OH)3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.37

7

12.73

1.0079470

7.0556290

Oxygen

O

25.83

31

56.36

15.9994300

495.9823300

Silicon

Si

10.24

7

12.73

28.0855300

196.5987100

Calcium

Ca

1.88

0.9

1.64

40.0784000

36.0705600

Iron

Fe

2.91

1

1.82

55.8452000

55.8452000

Lanthanum

La

39.07

5.4

9.82

138.9055200

750.0898080

Cerium

Ce

19.70

2.7

4.91

140.1161000

378.3134700

Anal­y­sis wt%

Ø SiO2 : 22.38, P2O5 : 0.63, Fe2O3 : 1.40, MgO : 0.51, La2O3 : 37.57, Ce2O3 : 23.67, Pr2O3 : 0.61, Nd2O3 : 1.48, SrO : 1.97, CaO : 5.09, H2O : 3.20, Ln2O3 : 63.67 (Ref: Canadian Mineralogist 2002)

Strunz 9th edi­tion incl. updates

9.AG.20

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
G: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in meist [6] und > [6] Koordination
20:

Lapis Clas­sifica­tion

VIII/B.19-050

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
19: Kationen mit Koordinationszahlen zwischen [8] und [12]

Clas­sifica­tion by Hölzel

9.AI.540

9: SILICATES
A: Nesosilicates
I: Nesosilicates with OH
5: With REE's

Dana 8th edi­tion

52.04.06.02

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
06: Cerite Group

IMA sta­tus

Umbenannt anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Cerite supergroup  ⇒ Cerite group

Optical Properties

Color

hellgelb, orange, rosabraun

Streak color

weiß

max. Birefrin­gence

0.010

Birefringence chart\! Ferricerite-(La) title=Birefringence chart Ferricerite-(La)

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

1.810

RI value γ / ε

1.820

Ri mean

1.813

2V angle

Uniaxial (+)

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

161

Space Group

R3c

Cell param­e­ters a (Å)

10.749

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

38.318

Cell param­e­ters a/b or c/a

3.565

Cell param­e­ters c/b

-

Z

6

Volumne (ų)

3834.154

X-Ray Pow­der Diffrac­tion

3.53(30),
3.47(40),
3.31(40),
3.10(20),
2.958(100),
2.833(40),
2.689(30),
1.949(30)

XRD chart Ferricerite-(La)

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5

VHN (Hard­ness Vick­ers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.74 (berechnet)

4.989 ( ρ calc. Mineralienatlas )

Cleav­ages

keine

Frac­ture

muschelig

Tenac­ity

spröde

Preface

Author (Name, Year)

Pakhomovsky & Men'shikov & Yakovenchuk & Ivanyuk & Krivovichev & Burns

References

Canadian Mineralogist 40 (2002), 1177

Ritsuro Miyawaki (Chairman, CNMNC), Frédéric Hatert (Vice-Chairman, CNMNC), Marco Pasero (Vice-Chairman,CNMNC) and Stuart J. Mills (Secretary, CNMNC) : Umbenannt zu Ferricerit-(La) und neue FormelCNMNC Newsletter 57 August September 2020, Mineralogical Magazine(2020), 1–4doi:10.1180/mgm.2020.73

Daniel Atencio, Andrezza de Almeida Azzi: Cerite: a new supergroup of minerals and cerite-(La) renamed ferricerite-(La). Mineralogical Magazine Vol. 84, Nr. 6 (2020) S. 928-931.

IMA group assignments

Other languages

Spanish

Cerita-(La)

French

Cerite-(La)

German

Ferricerit-(La)

English

Ferricerite-(La)

Russian

Церит-(La)

Traditional Chinese

鑭矽鈰石

Simplified Chinese

镧硅铈石

old name

German

Cerit-(La)

wurde umbenannt zu Ferricerit-(La) CNMNC Newsletter 57 August September 2020

English

Cerite-(La)

renamed CNMNC Newsletter 57 August September 2020 to Ferricerite-(La) since Fe is dominant in the M site.

CNMNC (IMA)-Number

IMA 2001-042

CNMNC symbol

Symbol

Fecrt-La

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

German pages

DeWikiPedia - search for: Ferricerit-(La)
Google-Bilder-Suche - search for: Ferricerit-(La)
Mineralienatlas.de (Forum) - search for: Ferricerit-(La)

English pages

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

Russian pages

Webmineral.ru - search for: Церит-(La)

Mineral Dealer

German pages

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

Locations with GPS information