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Dr. Chandrasekhara Venkata Raman
Rb[B5O6(OH)4] · 2H2O
Named for Sir Chandrasekhara Venkata Raman (1888-1970), originator of Raman spectroscopy.
Santite group

Classification of Ramanite-(Rb)

Approval Year:

E : Pentaborates
A : Neso-pentaborates

5 : Pentaborates

Chemical Properties of Ramanite-(Rb)

Rb[B5O6(OH)4] · 2H2O
IMA Formula:
RbB5O6(OH)4 · 2H2O
Elements listed in formula:

Crystallography of Ramanite-(Rb)

Crystal System:
Class (H-M):
mm2 - Pyramidal
Space Group:
Cell Parameters:
a = 11.304 Å, b = 10.963 Å, c = 9.337 Å
a:b:c = 1.031 : 1 : 0.852
Unit Cell Volume:
V 1,157.09 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
3.554 (100)
5.481 (85)
3.391 (63)
2.826 (47)
6.018 (38)
3.329 (38)
2.894 (28)
3.259 (26)

Type Occurrence of Ramanite-(Rb)

Relationship of Ramanite-(Rb) to other Species

6.EA.05SborgiteNa[B5O6(OH)4] · 3H2O
6.EA.05LeucostauritePb2[B5O9]Cl · 0.5H2O
6.EA.10SantiteK[B5O6(OH)4] · 2H2O
6.EA.10Ramanite-(Cs)Cs[B5O6(OH)4] · 2H2O
6.EA.15Ammonioborite(NH4)2[B5O6(OH)4]2 · H2O
6.EA.25UlexiteNaCa[B5O6(OH)6] · 5H2O

Other Names for Ramanite-(Rb)

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ramanite-(Rb)

Reference List:
Thomas, R., P. Davidson, & A. Hahn (2008): Ramanite-(Ce) and ramanite-(Rb): New cesium and rubidium pentaborate tetrahydrate minerals identified with Raman spectroscopy: American Mineralogist 93, 1034-1042.

Internet Links for Ramanite-(Rb) URL:
Please feel free to link to this page.

Localities for Ramanite-(Rb)

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Italy (TL)
  • Tuscany
    • Livorno Province
      • Elba Island
        • Campo nell'Elba
Thomas, R., Davidson, P., & Hahn, A. (2008). Ramanite-(Cs) and ramanite-(Rb): New cesium and rubidium pentaborate tetrahydrate minerals identified with Raman spectroscopy. American Mineralogist, 93(7), 1034-1042.
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