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Ramanite-(Rb)

Additional Functions

Collectors Summary

Color farblos
Streak color weiß
Lustre Glasglanz
Crystal System orthorhombisch, Aba2
Morphology winzige, klare, Tafeln, Größe unter 5 µm, in Flüssigkeitseinschlüssen in Quarz aus Schriftgranit.

Chemism

Chemical formula

Rb[B5O6(OH)4]·2H2O

Chemical composition

Rubidium, Bor, Sauerstoff, Wasserstoff

Unit weight: 339.583066 u; Number of atoms in the formula: 26

Info

Empirical formula:

Rb[B5O6(OH)4]·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.37

8

30.77

1.0079470

8.0635760

Boron

B

15.92

5

19.23

10.8117000

54.0585000

Oxygen

O

56.54

12

46.15

15.9994300

191.9931600

Rubidium

Rb

25.17

1

3.85

85.4678300

85.4678300

Analysis wt%

B2O3 : 51.25, Rb2O : 25.53, H2O : 21.22 (Ref: berechnet)

Strunz 9th edition incl. updates

6.EA.10

6: Borate
E: Pentaborate
A: Insel(Neso)-Pentaborate
10:Santit-Gruppe

Lapis Classification

V/H.15-022

V: NITRATE, CARBONATE UND BORATE
H: Gruppenborate
15: Planare und tetraedrische Gruppen [B3O5] 1- bis [B6O10] 2-

Classification by Hölzel

6.EA.140

6: Borates
E: Pentaborates
A: Nesopentaborates
1: Sborgite-Group - 5(4P+T)

IMA status

anerkannt Mai 2007

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

RI value α / ω / n

1.424

RI value β

by

RI value γ / ε

GlD

Ri mean

1.424

2V angle

Uniaxial

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mm2

Space Group number

41

Space Group

Aba2

Cell parameters a (Å)

11.304

Cell parameters b (Å)

10.963

Cell parameters c (Å)

9.337

Cell parameters a/b or c/a

1.031

Cell parameters c/b

0.852

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

1157.095

X-Ray Powder Diffraction

3.554(100), 5.481(85), 3.391(63), 2.826(47), 6.018(38), 3.329(38), 2.894(28), 3.259(26)

XRD chart Ramanite-(Rb)

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

Morphology

winzige, klare, Tafeln, Größe unter 5 µm, in Flüssigkeitseinschlüssen in Quarz aus Schriftgranit.

Physical Properties

Density (g/cm³)

1.95 ber.

1.949 ( ρ calc. Mineralienatlas )

Chemical Properties and Tests

extrem leicht wasserlöslich

Preface

Name from

dem Auffinden via Raman-Spektroskopie und dem indischen Nobelpreisträger für Physik, Sir Chandrasekhara Venkata Raman (1888-1970) benannt, der die Grundlagen für diese Methode beschrieb.

Author (Name, Year)

Rainer Thomas et al., 2008

References

Rainer Thomas, Paul Davidson, Andreas Hahn: Ramanite-(Cs) and ramanite-(Rb): New cesium and rubidium pentaborate tetrahydrate minerals identified with Raman spectroscopy. Amer. Mineral. 93 (2008) S. 1034-1042.

S. Weiß: Neue Mineralien. Lapis 3/2009, S. 46.

IMA - Mineralveröffentlichungen, Mai 2007

Mineralien Welt 05/09, Steffen Jahn, Neue Mineralien

Other languages

German

Ramanit-(Rb)

English

Ramanite-(Rb)

CNMNC (IMA)-Number

IMA 2007-006

CNMNC symbol

Symbol

Ram-Rb

IDs

GUSID (Global unique identifier short form) VPW3G1F1gUuyzhtXjfl0_A
GUID (Global unique identifier) 1BB7F554-7551-4B81-B2CE-1B578DF974FC
Database ID 4600