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Ranunculite (Ranunculit)

Pictures (3 Images total)

Ranunculit
Views (File:
1136656528
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Ranunculit
Fundort: Kobokobo-Pegmatit, Lusungu River District, Kongo
Copyright: Stephan Wolfsried; Contribution: JHM
Location: Demokratische Republik Kongo/Süd-Kivu, Provinz/Kobokobo-Pegmatit
Mineral: Ranunculite
Image: 1136656528
Rating: 8 (votes: 2)
License: Usage for Mineralienatlas project only
Ranunculit

Fundort: Kobokobo-Pegmatit, Lusungu River District, Kongo
Copyright: Stephan Wolfsried
Contribution: JHM 2006-01-07
Locality: Kobokobo-Pegmatit / Süd-Kivu, Provinz / Demokratische Republik Kongo
Ranunculit
Views (File:
1283038948
): 949
Ranunculit
Bildbreite: 3 mm; Fundort: Kobokobo-Pegmatit, Provinz Sud-Kivu, Demokratische Republik Kongo
Copyright: Stephan Wolfsried; Contribution: slugslayer
Location: Demokratische Republik Kongo/Süd-Kivu, Provinz/Kobokobo-Pegmatit
Mineral: Ranunculite
Image: 1283038948
Rating: 7 (votes: 2)
License: Usage for Mineralienatlas project only
Ranunculit

Bildbreite: 3 mm; Fundort: Kobokobo-Pegmatit, Provinz Sud-Kivu, Demokratische Republik Kongo
Copyright: Stephan Wolfsried
Contribution: slugslayer 2010-08-29
Locality: Kobokobo-Pegmatit / Süd-Kivu, Provinz / Demokratische Republik Kongo
Ranunculit
Views (File:
1378220918
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Ranunculit
Bildbreite: 2 mm, Fundort: Kobokobo-Pegmatit, Provinz Sud-Kivu, Demokratische Republik Kongo
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Demokratische Republik Kongo/Süd-Kivu, Provinz/Kobokobo-Pegmatit
Mineral: Ranunculite
Image: 1378220918
License: Usage for Mineralienatlas project only
Ranunculit

Bildbreite: 2 mm, Fundort: Kobokobo-Pegmatit, Provinz Sud-Kivu, Demokratische Republik Kongo
Copyright: Luigi Chiappino
Contribution: thdun5 2013-09-03
Locality: Kobokobo-Pegmatit / Süd-Kivu, Provinz / Demokratische Republik Kongo

Collectors Summary

Color goldgelb
Streak color blassgelb
Hardness (Mohs) 3
Solubility ++ HNO3, HCl
Crystal System monoklin,

Chemism

Chemical formula

HAl(UO2)PO4(OH)3·4H2O

Chemical composition

Aluminium, Phosphor, Sauerstoff, Uran, Wasserstoff

Unit weight: 516.0721664 u; Number of atoms in the formula: 28

Info

Empirical formula:

HAl(UO2)PO4(OH)3·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.34

12

42.86

1.0079470

12.0953640
Oxygen

O

40.30

13

46.43

15.9994300

207.9925900
Aluminium

Al

5.23

1

3.57

26.9815382

26.9815382
Phosphorus

P

6.00

1

3.57

30.9737612

30.9737612
Uranium

U

46.12

1

3.57

238.0289130

238.0289130

Analysis wt%

Al2O3 : 9.90, UO3 : 54.50, P2O5 : 13.20, H2O : 20.30 (Ref: Mineralogical Magazine 79)

Strunz 9th edition incl. updates

8.EB.40

8: Phosphate, Arsenate, Vanadate
E: Uranylphosphate und Arsenate
B: UO2:RO4 = 1:1
40:Ranunculit-Gruppe

Lapis Classification

VII/E.05-010

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
E: Uranyl-Phosphate/Arsenate und Uranyl-Vanadate mit [UO2] 2+- [PO4]/[AsO4] 3- und [UO2] 2+-[V2O8] 6-, sowie isotype Vanadate (Sincosit-Reihe)

Classification by Hölzel

8.EC.200

8: PHOSPHATES ARSENATES VANADATES
E: Uranyl (Phospates-Arsenates-Vanadates)
C: Monoclinic Uranyl (Phosphates-Arsenates)
2: C small-medium + large Ulrichite-Group

Dana 8th edition

42.02.02.01

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
02: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (AB)3 (XO4) Zq · x(H2O)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

goldgelb

Streak color

blassgelb

max. Birefringence

0.027
Birefringence chart\! Ranunculite title=Birefringence chart Ranunculite

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

1.643

RI value β

1.664

RI value γ / ε

1.670

Ri mean

1.659

2V angle

Biaxial (-) 56°c

Optical Data Luminescence

Luminescence

Emission (nm): 491, 501, 522, 545, 570, 600 (Geipel 2000)

Color LW-UV (365nm)

  

grün

Color SW-UV (254nm)

  

gelblich grün

Most Common Activator

(UO2)2+ (Uranyl-Ion) spezifisch

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

11.10

Cell parameters b (Å)

17.7

Cell parameters c (Å)

18.0

Cell parameters a/b or c/a

0.627

Cell parameters c/b

1.017

Cell parameters α

90°

Cell parameters β

90°..

Cell parameters γ

90°

Z

14

Volumne (ų)

3536.46

X-Ray Powder Diffraction

9.00(100),
4.70(50),
4.45(30),
3.53(20),
3.34(20),
3.133(80),
2.978(40),
1.850(40)
XRD chart Ranunculite

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

Physical Properties

Hardness (Mohs)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.4 (gemessen)

3.392 ( ρ calc. Mineralienatlas )

Instability

++ HNO3, HCl

(Co-)Type locality

(Co-)Type locality

Demokratische Republik Kongo/Süd-Kivu, Provinz/Kobokobo-Pegmatit

Preface

Name from

dem botanischen Namen Ranunculus (Hahnenfuß) wegen der goldgelben Blütenfarbe. (Deliens & Piret, 1980)

Author (Name, Year)

Deliens & Piret, 1979

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 (1979), 321

Geipel, G., Bernhard, G., Rutsch, M., Brendler, V., & Nitsche, H. (2000). Spectroscopic properties of uranium (VI) minerals studied by time-resolved laser-induced fluorescence spectroscopy (TRLFS). Radiochimica Acta, 88(9-11), 757-762.

Other languages

German

Ranunculit

Spanish

Ranunculita

English

Ranunculite

French

Ranunculite

Russian

Ранункулит

https://catalogmineralov.ru/mineral/ranunculite.html

Simplified Chinese

磷铝铀矿 III

CNMNC (IMA)-Number

IMA 1978-067

CNMNC symbol

Symbol

Rnu

Locations with GPS information