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Ferri-hellandite-(Ce)

Collectors Summary

Crystal System monoklin, P2/a

Chemism

Chemical formula

(Ca3Ce)Ce2Fe3+☐2B4Si4O22(OH)2

Chemical composition

Calcium, Cerium, Eisen, Silicium, Bor, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 1138.01983402 u; Number of atoms in the formula: 43

Info

Empirical formula:

(Ca3Ce)Ce2FeVc2B4Si4O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Vacancy

Vc

0.00

2

4.65

0.0000000

0.0000000
Hydrogen

H

0.18

2

4.65

1.0079470

2.0158940
Boron

B

3.80

4

9.30

10.8117000

43.2468000
Oxygen

O

33.74

24

55.81

15.9994300

383.9863200
Silicon

Si

9.87

4

9.30

28.0855300

112.3421200
Calcium

Ca

10.57

3

6.98

40.0784000

120.2352000
Iron

Fe

4.91

1

2.33

55.8452000

55.8452000
Cerium

Ce

36.94

3

6.98

140.1161000

420.3483000

IMA status

anerkannt - CNMNC Newsletter 60, Februar - März 2021

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Hellandite group

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

13

Space Group

P2/a

Cell parameters a (Å)

19.1616(2)

Cell parameters b (Å)

4.7561(4)

Cell parameters c (Å)

10.34016(1)

Cell parameters a/b or c/a

4.029

Cell parameters c/b

2.174

Cell parameters α

90°

Cell parameters β

111.173(1)°

Cell parameters γ

90°

Volume (ų)

878.731

Crystal structure

Hellandit-Gruppe; Struktur ermittelt

X-Ray Powder Diffraction

8.934(37), 3.466(37), 3.246(33), 3.101(34), 2.929(37), 2.861(44), 2.658(100), 1.910(44)
XRD chart Ferri-hellandite-(Ce)

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

(Co-)Type locality

(Co-)Type locality

Norwegen/Vestfold, Provinz/Porsgrunn, Kommune/Mørje/Sagåsen (Strandåsen)/Sagasen Steinbruch

Type material

Das Typenmaterial ist in den mineralogischen Sammlungen des Naturhistorischen Museums der Universität Oslo, P.O. Box 1172, Blindern, 0318 Oslo, Norwegen, Katalognummer KNR 44259 (XRD), und des Mährischen Museums, Abteilung für Mineralogie und Petrologie, Zelný trh 6, Brünn, Tschechische Republik, Katalognummer B12258 (EMPA), hinterlegt.

Preface

Author (Name, Year)

Henrik Friis, Radek Škoda, Alf Olav Larsen, Michaela Vašinová-Galiová, Radim Čtvrtlík und Jan Filip (2021)

References

Friis, H., Škoda, R., Larsen, A.O., Vašinová-Galiová, M., Čtvrtlík, R. and Filip, J. (2021) Ferri-hellandite-(Ce), IMA 2020-085. CNMNC Newsletter 60; Mineralogical Magazine, 85, https://doi.org/10.1180/mgm.2021.30

IMA group assignments

Other languages

German

Ferri-Hellandit-(Ce)

English

Ferri-hellandite-(Ce)

CNMNC (IMA)-Number

IMA 2020-085

CNMNC symbol

Symbol

Fhld-Ce

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 2IMOfadgskiR9HtMg2o7Pw
GUID (Global unique identifier) 7D0E83D8-60A7-48B2-91F4-7B4C836A3B3F
Database ID 9001