Kentbrooksite R110208
Name: Kentbrooksite
RRUFF ID: R110208
Ideal Chemistry: (Na,REE)15(Ca,REE)6Mn3Zr3Nb(Si25O73)(O,OH,H2O)3(F,Cl)2
Locality: Pocos de Caldas plateau, Minas Gerais, Brazil
Source: Gunnar Farber [view label]
Owner: RRUFF
Description: Red massive crystalline associated with aegirine and nepheline
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ eudialyte (13) ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Raman on the primary sample
DOWNLOADS:

  To download sample data,
  please select a specific
  orientation angle.
Direction of polarization of laser relative to fiducial mark:
X Min:    X Max:    X Sort:
BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R110208
Wavelength:
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
DOWNLOADS:

Raman Data (Processed)
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R110208.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 14.270(1)Å    b: 14.270(1)Å    c: 30.154(3)Å
alpha: 90°    beta: 90°    gamma: 120°   Volume: 5317.9(8)Å3    Crystal System: hexagonal
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

DOWNLOADS:

DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
X Min:    X Max:    X Sort:
REFERENCES for Kentbrooksite

American Mineralogist Crystal Structure Database Record: [view record]

Johnsen O, Grice J D, Gault R A (1998) Kentbrooksite from the Kangerdlugssuaq intrusion, East Greenland, a new Mn-REE-Nb-F end-member in a series within the eudialyte group: Description and crystal structure, European Journal of Mineralogy, 10, 207-219   [view file]

Jambor J L, Roberts A C (1999) New mineral names, American Mineralogist, 84, 193-198   [view file]

Rastsvetaeva R K, Khomyakov A P, Nekrasov Y V (1999) Crystal structure of a novel analog of eudialyte with R3 symmetry, Crystallography Reports, 44, 765-769

Ekimenkova I A, Rastsvetaeva R K, Khomyakov A P (2000) Crystal structure of the Fe,Cl-analogue of kentbrooksite, Doklady Chemistry, 370, 17-20

Jambor J L, Roberts A C (2001) New mineral names, American Mineralogist, 86, 939-942   [view file]

Johnsen O, Ferraris G, Gault R A, Grice J D, Kampf A R, Pekov I V (2003) The nomenclature of eudialyte-group minerals, The Canadian Mineralogist, 41, 785-794   [view file]

Rastsvetaeva R K, Chukanov N V (2012) Classification of eudialyte-group minerals, Geology of Ore Deposits, 54, 487-497   [view file]

Borst A M, Finch A A, Friis H, Horsburgh N J, Gamaletsos P N, Goettlicher J, Steininger R, Geraki K (2020) Structural state of rare earth elements in eudialyte-group minerals, Mineralogical Magazine, 84, 19-34