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Cheralite (Cheralith)

Pictures (2 Images total)

Cheralith, Columbit-(Fe)
Views (File:
1555964299
): 2030
Cheralith, Columbit-(Fe)
grüner monokliner Kristall in Muskovit mit Columbit, aus einem teilweise in Vivianit umgewandeltem, abgerollten Triphylin-Brocken; Bestimmung EDX; Hagendorf Süd, Waidhaus, Oberpfalz, Bayern, Deutschland; Bildbreite 1,2 mm
Copyright: Josef 84,55; Contribution: Josef 84,55
Collection: Josef 84,55
Location: Deutschland/Bayern/Oberpfalz, Bezirk/Neustadt an der Waldnaab, Landkreis/Waidhaus/Hagendorf/Hagendorf-Süd (Grube Cornelia)
Mineral: Cheralite, Columbite-(Fe)
Image: 1555964299
Rating: 10 (votes: 2)
License: Usage for Mineralienatlas project only
Cheralith, Columbit-(Fe)  E
Analysed with energy dispersive X-ray spectroscopy EDX

grüner monokliner Kristall in Muskovit mit Columbit, aus einem teilweise in Vivianit umgewandeltem, abgerollten Triphylin-Brocken; Bestimmung EDX; Hagendorf Süd, Waidhaus, Oberpfalz, Bayern, Deutsc...

Collection: Josef 84,55
Copyright: Josef 84,55
Contribution: Josef 84,55 2019-04-22
Locality: Hagendorf-Süd (Grube Cornelia) / Hagendorf / Waidhaus / Neustadt an der Waldnaab, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland
Cheralit
Views (File:
1681065412
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Cheralit
rötliche Massen von Cheralit mit schwarzem Euxenit, Uranium King Mine, Encampmen, Carbon County, Wyoming, USA; BB ~ 1,5 cm
Copyright: mintreasure.com; Contribution: openpit
Location: USA/Wyoming/Carbon Co./Encampment District/Encampment/Uranium King Mine
Mineral: Cheralite
Image: 1681065412
License: Usage for Mineralienatlas project only
Cheralit

rötliche Massen von Cheralit mit schwarzem Euxenit, Uranium King Mine, Encampmen, Carbon County, Wyoming, USA; BB 1,5 cm

Copyright: mintreasure.com
Contribution: openpit 2023-04-09
Locality: Uranium King Mine / Encampment / Encampment District / Carbon Co. / Wyoming / USA

You find additional specimen at the Geolitho Museum

Collectors Summary

Color grau braun, rötlichbraun
Hardness (Mohs) 5.5
Crystal System monoklin, P21/n

Additional information / Summary

(ehemals Brabantit)

Chemism

Chemical formula

CaTh(PO4)2

Chemical composition

Calcium, Thorium, Phosphor, Sauerstoff

Unit weight: 462.0594724 u; Number of atoms in the formula: 12

Info

Empirical formula:

CaTh(PO4)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

27.70

8

66.67

15.9994300

127.9954400

Phosphorus

P

13.41

2

16.67

30.9737612

61.9475224

Calcium

Ca

8.67

1

8.33

40.0784000

40.0784000

Thorium

Th

50.22

1

8.33

232.0381100

232.0381100

Analysis wt%

CaO : 11.94, MgO : 0.56, Al2O3 : 0.74, ThO2 : 52.26, P2O5 : 27.68, SiO2 : 2.27, H2O : 3.07 (Ref: Neues Jahrbuch für Mineralogie, (Monatshefte) 80)

Strunz 9th edition incl. updates

8.AD.50

8: Phosphate, Arsenate, Vanadate
A: Phosphate, etc., ohne weitere Anionen, ohne H2O
D: Mit ausschließlich großen [Kationen]
50:Monazit-Gruppe

Lapis Classification

VII/A.15-050

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
A: Wasserfreie Phosphate [PO4] 3-, ohne fremde Anionen
15: Sehr große Kationen: Ca-Na-K, SE, Bi u.a.; Monazit-Gruppe

Classification by Hölzel

8.AF.140

8: PHOSPHATES ARSENATES VANADATES
A: Phosphates (-anions -water)
F: Monazite-Group

IMA status

der Name "Brabantit" wurde von der IMA wurde diskreditiert, das Mineral heißt nun "Cheralith", anerkannt; pre IMA (vor 1959) vererbt

Mineral status

anerkanntes Mineral

Optical Properties

Color

grau braun, rötlichbraun

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.037

Birefringence chart\! Cheralite title=Birefringence chart Cheralite

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

1.779

RI value β

1.780

RI value γ / ε

1.816

Ri mean

1.792

2V angle

Biaxial (+) 18°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell parameters a (Å)

6.751

Cell parameters b (Å)

6.424

Cell parameters c (Å)

6.468

Cell parameters a/b or c/a

1.051

Cell parameters c/b

1.007

Cell parameters α

90°

Cell parameters β

103.88

Cell parameters γ

90°

Z

2

Volume (ų)

272.316

Crystal structure

Philippe E. Raison, Stephen Heathman, Gilles Wallez, Carmen E. Zvoriste, Denis Bykov, Gaël Ménard, Emmanuelle Suard, Karin Popa, Nicolas Dacheux, Rudy J. M. Konings et al.: Structure and nuclear density distribution in the cheralite—CaTh(PO4)2: studies of its behaviour under high pressure (36 GPa). Physics and Chemistry of Minerals Volume 39, Number 8 (2012) S. 685-692.

X-Ray Powder Diffraction

4.664(20),
4.167(20),
3.481(30),
3.277(60),
3.074(100),
2.862(60),
2.177(20),
1.731(20)

XRD chart Cheralite

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)

5.5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.28 (gemessen) 5.39 (berechnet)

5.635 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Indien/Kerala/Thiruvananthapuram (Trivandrum), Distrikt/Kuttakuzhi (Kuttankuli)

Type material

Mineralogische Sammlungen Technische Universität Berlin

Collection number of type material

81/40 / 26-2

Paragenesis of type material

Albit, Muskovit, Thorit, Uraninit u.a.

Preface

Author (Name, Year)

Bowie & Horne, 1953

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

Mineralogical Magazine 43 (1980), 885

Canadian Mineralogist 45 (2007), 503

American Mineralogist, Volume 93, pages 1356–1362, 2008

Linthout K (2007) Tripartite division of the system 2REEPO4—CaTh(PO4)2—2ThSiO4, discreditation of brabantite, and recognition of cheralite as the name for members dominated by CaTh(PO4)2. The Canadian Mineralogist 45, 503-508

Other languages

Spanish

Brabantita

French

Brabantite

English

Cheralite

German

Cheralith

Russian

Брабантит

Russian

Чералит

Simplified Chinese

磷钙钍矿

Japanese

チェラライト

Alternative Name

Brabantit

Brabantita

English

Brabantite

Brabantite

Cathophorit

Cathophorita

Cathophorite

Spanish

Cheralita

French

Cheralite

Lingaitukuang

CNMNC (IMA)-Number

IMA 1978-003

CNMNC symbol

Symbol

Cher

Locations with GPS information

IDs

GUSID (Global unique identifier short form) F3mvH2rWokCrmnab06hsHg
GUID (Global unique identifier) 1FAF7917-D66A-40A2-AB9A-769BD3A86C1E
Database ID 471