https://www.mineraliengrosshandel.com
https://www.mineralbox.biz
https://www.mineral-bosse.de
https://weloveminerals.com/
https://www.edelsteine-neuburg.de
'._('einklappen').'
 

Stillwellite-(Ce)

Pictures (12 Images total)

Stillwellit-(Ce)
Views (File:
1221579474
): 1246
Stillwellit-(Ce)
Bildbreite: 2,5 mm; Fundort: Poudrette quarry, Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Kanada/Québec, Provinz/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Stillwellite-(Ce)
Image: 1221579474
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Stillwellit-(Ce)

Bildbreite: 2,5 mm; Fundort: Poudrette quarry, Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: Stephan Wolfsried
Contribution: Hg 2008-09-16
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec, Provinz / Kanada
Stillwellit-(Ce)
Views (File:
1295564346
): 993
Stillwellit-(Ce)
Größe: 1,8 mm; Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien
Copyright: Enrico Bonacina; Contribution: Hg
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla/Tre Croci
Mineral: Stillwellite-(Ce)
Image: 1295564346
Rating: 8 (votes: 2)
License: Usage for Mineralienatlas project only
Stillwellit-(Ce)

Größe: 1,8 mm; Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien
Copyright: Enrico Bonacina
Contribution: Hg 2011-01-20
Locality: Tre Croci / Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien
Stillwellit-(Ce)
Views (File:
1275675207
): 355
Stillwellit-(Ce)
Kristallgröße: 0,8 mm, Fundort: Vetralla, Lago de Vico, Latium, Italien
Copyright: Enrico Bonacina; Contribution: thdun5
Collection: Domenico Preite
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla
Mineral: Stillwellite-(Ce)
Image: 1275675207
Rating: 5.5 (votes: 2)
License: Usage for Mineralienatlas project only
Stillwellit-(Ce)

Kristallgröße: 0,8 mm, Fundort: Vetralla, Lago de Vico, Latium, Italien
Collection: Domenico Preite
Copyright: Enrico Bonacina
Contribution: thdun5 2010-06-04
Locality: Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien
Stillwellit-(Ce)
Views (File:
1344811674
): 874
Stillwellit-(Ce)
Kristallgröße: 0,3 mm, Fundort: Mt Cavalluccio, Sacrofano Caldera, Latium, Italien
Copyright: Luigi Mattei; Contribution: thdun5
Location: Italien/Latium (Lazio), Region/Rom, Metropolitanstadt/Sacrofano/Sacrofano-Caldera/Mt. Cavalluccio
Mineral: Stillwellite-(Ce)
Image: 1344811674
Rating: 5.5 (votes: 2)
License: Usage for Mineralienatlas project only
Stillwellit-(Ce)

Kristallgröße: 0,3 mm, Fundort: Mt Cavalluccio, Sacrofano Caldera, Latium, Italien
Copyright: Luigi Mattei
Contribution: thdun5 2012-08-12
Locality: Mt. Cavalluccio / Sacrofano-Caldera / Sacrofano / Rom, Metropolitanstadt / Latium (Lazio), Region / Italien
Stillwellit-(Ce)
Views (File:
1275675017
): 548
Stillwellit-(Ce)
Bildbreite: 0,5 mm, Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Mattei; Contribution: thdun5
Location: Italien/Latium (Lazio), Region/Viterbo, Provinz/Vicosee (Lago di Vico)/Vetralla/Tre Croci
Mineral: Stillwellite-(Ce)
Image: 1275675017
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Stillwellit-(Ce)

Bildbreite: 0,5 mm, Fundort: Tre Croci, Vetralla, Lago de Vico, Latium, Italien
Copyright: Luigi Mattei
Contribution: thdun5 2010-06-04
Locality: Tre Croci / Vetralla / Vicosee (Lago di Vico) / Viterbo, Provinz / Latium (Lazio), Region / Italien

Collectors Summary

Color rot braun, blassrosa
Streak color weiß
Crystal System trigonal, P31

Chemism

Chemical formula

(Ce,La,Ca)BSiO5

Chemical composition

Calcium, Cerium, Lanthanum, Silicium, Bor, Sauerstoff

Unit weight: 248.643536 u; Number of atoms in the formula: 8

Info

Empirical formula:

(Ce0.6La0.3Ca0.1)BSiO5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Boron

B

4.35

1

12.50

10.8117000

10.8117000
Oxygen

O

32.17

5

62.50

15.9994300

79.9971500
Silicon

Si

11.30

1

12.50

28.0855300

28.0855300
Calcium

Ca

1.61

0.1

1.25

40.0784000

4.0078400
Lanthanum

La

16.76

0.3

3.75

138.9055200

41.6716560
Cerium

Ce

33.81

0.6

7.50

140.1161000

84.0696600

Analysis wt%

SiO2 : 22.62, ThO2 : 3.82, Pr2O3 : 1.97, La2O3 : 19.42, Nd2O3 : 5.48, Ce2O3 : 31.69, B2O3 : 13.46, Ln2O3 : 59.14 (Ref: Canadian Mineralogist 93)

Strunz 9th edition incl. updates

9.AJ.25

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
J: Insel(Neso)silikate mit BO3 Triangeln und /oder B[4], Be[4] Tetraedern, eckenteilend mit SiO4
25:

Lapis Classification

VIII/E.05-020

VIII: SILIKATE
E: Ringsilikate
5: Dreierringe [Si3O9] 6-

Classification by Hölzel

9.AK.570

9: SILICATES
A: Nesosilicates
K: Boro and Beryllo Nesosilicates
5: C large

Dana 8th edition

54.02.03.02

54: Nesosilicates Nesosilicate Borosilicates and Some Beryllosilicates
02: Nesosilicates Nesosilicate Borosilicates and Some Beryllosilicates with B in [4] coordination
03: Cappellanite - Stillwellite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

rot braun, blassrosa

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.015
Birefringence chart\! Stillwellite-(Ce) title=Birefringence chart Stillwellite-(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

1.765

RI value γ / ε

1.780

Ri mean

1.770

2V angle

Uniaxial (+)

Optical Data Luminescence

Color SW-UV (254nm)

  

blau

Most Common Activator

Sm3+

Other Activators

Dy3+, Tb3+

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

144

Space Group

P31

Cell parameters a (Å)

6.907

Cell parameters b (Å)

-

Cell parameters c (Å)

6.768

Cell parameters a/b or c/a

0.980

Cell parameters c/b

-

Z

3

Volume (ų)

279.621

X-Ray Powder Diffraction

4.44(50),
3.43(100),
2.96(100),
2.71(30),
2.24(30),
2.23(30),
2.13(70),
1.864(50)
XRD chart Stillwellite-(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

Density (g/cm³)

4.57 - 4.6 / Durchschnittlich = 4.58

4.429 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Australien/Queensland/City Of Mount Isa & Shire Of Cloncurry/Mt-Isa-Cloncurry-Revier/Mt Isa/Mary Kathleen Domain/Mary Kathleen Mine

Australien/Queensland/Cloncurry Shire/Rosebud Station/Mary Kathleen, Distrikt/Mary Kathleen Mine

Preface

Author (Name, Year)

McAndrew & Scott, 1955

References

Nature 176 (1955), 509

Other languages

German

Stillwellit-(Ce)

Spanish

Stillwellita-(Ce)

English

Stillwellite-(Ce)

French

Stillwellite-(Ce)

Russian

Стиллуэллит-(Ce)

Traditional Chinese

菱硼矽鈰礦

Simplified Chinese

菱硼硅铈矿

CNMNC symbol

Symbol

Swl-Ce

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 7YgfuW-4akCsK31iiCIpQQ
GUID (Global unique identifier) B91F88ED-B86F-406A-AC2B-7D6288222941
Database ID 3645