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reddish brown, red
5 - 6
Specific Gravity:
Crystal System:
Member of:
This page provides mineralogical data about Ferrokentbrooksite.

Hide all sections | Show all sections

Classification of FerrokentbrooksiteHide

Approval Year:

9 : SILICATES (Germanates)
C : Cyclosilicates
O : [Si9O27]18- 9-membered rings

64 : CYCLOSILICATES Rings with Other Anions and Insular Silicate Groups
1 : Rings with Other Anions and Insular Silicate Groups with mixed ring types

Physical Properties of FerrokentbrooksiteHide

reddish brown, red
5 - 6 on Mohs scale
Hardness Data:
None Observed
without cleavage
without parting
Irregular/Uneven, Conchoidal
3.06 g/cm3 (Measured)    3.06 g/cm3 (Calculated)

Optical Data of FerrokentbrooksiteHide

Uniaxial (-)
RI values:
nω = 1.622 nε = 1.619
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
no pleochroism at maximum birefringence

Chemical Properties of FerrokentbrooksiteHide

IMA Formula:
Common Impurities:

Crystallography of FerrokentbrooksiteHide

Crystal System:
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
Cell Parameters:
a = 14.2099 Å, c = 30.06 Å
a:c = 1 : 2.115
Unit Cell V:
5257.7 ų
Pseudo-octahedral crystals, masses. Forms observed: Dominant {0001}, {10¯11} and {01¯12}. Minor: {02¯21} and {11¯20}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:

Type Occurrence of FerrokentbrooksiteHide

General Appearance of Type Material:
As reddish brown to red, pseudo-octahedral crystals up to 1 cm in diameter.
Place of Conservation of Type Material:
holotype specimen Canadian Museum of Nature CMNMC 81563
Associated Minerals at Type Locality:

Synonyms of FerrokentbrooksiteHide

Other Language Names for FerrokentbrooksiteHide

Simplified Chinese:铁铌异性石
Traditional Chinese:鐵鈮異性石

Relationship of Ferrokentbrooksite to other SpeciesHide

Member of:
Other Members of this group:
AlluaiviteNa19(Ca,Mn)6(Ti,Nb)3Si26O74Cl · 2H2OTrig. 3m (3 2/m) : R3m
AndrianoviteNa12(K,Sr,Ce)3Ca6Mn3Zr3Nb(Si25O73)(O,H2O,OH)5Trig. 3m : R3m
Aqualite(H3O)8(Na,K,Sr)5Ca6Zr3Si26O66(OH)9ClTrig. 3 : R3
CarbokentbrooksiteNa11-12(Na,Ce)3Ca6Mn3Zr3Nb[(OH)3|CO3|(Si3O9)2|(Si9O27)2SiO] · H2OTrig. 3m : R3m
DavinciiteNa12K3Ca6Fe2+3Zr3(Si26O73OH)Cl2 Trig. 3m : R3m
DualiteNa30(Ca,Na,Ce,Sr)12(Na,Mn,Fe,Ti)6Zr3Ti3Mn[Si51O144](OH,H2O,Cl)9Trig. 3m : R3m
EudialyteNa15Ca6(Fe2+,Mn2+)3Zr3[Si25O73](O,OH,H2O)3(OH,Cl)2Trig. 3m (3 2/m) : R3m
FeklicheviteNa11Ca9(Fe3+,Fe2+)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5Trig. 3m : R3m
FengchengiteNa123(Ca,Sr)6Fe3+3 Zr3Si(Si25O73)(H2O,OH)3(OH,Cl)2Trig. 3m (3 2/m) : R3m
GeorgbarsanoviteNa12(Mn,Sr,REE)3Ca6Fe2+3Zr3NbSi25O76Cl2·H2OTrig. 3m : R3m
GolysheviteNa10Ca3Ca6Zr3Fe2SiNb(Si3O9)2(Si9O27)2CO3(OH)3 · H2OTrig. 3m : R3m
Hydrorastsvetaevite(Na11(H3O)11K6(H2O)1.5Sr)Ca12Fe3Na2MnZr6Si52O144(OH)4.5Cl3.5Trig. 3m : R3m
Ikranite(Na,H3O)15(Ca,Mn2+)6Fe3+2Zr3-4[Cl|(H0-3Si3O9)2|{(Si9O27)2,(Si9O27)2SiO}] · 2-3H2OTrig. 3m : R3m
Ilyukhinite(H3O,Na)14Ca6Mn2Zr3Si26O72(OH)2·3H2OTrig. 3m : R3m
Johnsenite-(Ce)Na12Ce3Ca6Mn3Zr3WSi25O73(CO3)(OH)2Trig. 3m : R3m
Kentbrooksite(Na,REE)15(Ca,REE)6(Mn2+,Fe2+)3Zr3Nb[Si25O74]F2 · 2H2OTrig. 3m : R3m
KhomyakoviteNa12Sr3Ca6Fe3Zr3W[Si25O73](O,OH,H2O)3(OH,Cl)2Trig. 3m : R3m
Labyrinthite(Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3Trig. 3 : R3
ManganoeudialyteNa14Ca6Mn3Zr3[Si26O72(OH)2](H2O,Cl,O,OH)6Trig. 3m : R3m
ManganokhomyakoviteNa12Sr3Ca6Mn3Zr3W[Si25O73](O,OH,H2O)3(OH,Cl)2Trig. 3m : R3m
MogoviditeNa9(Ca,Na)12Fe2Zr3Si25O72(CO3) (OH)4Trig. 3m : R3m
OneilliteNa15Ca3Mn3Fe2+3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2Trig. 3 : R3
RaslakiteNa15Ca3Fe2+3(Na,Zr)3Zr3Nb<0.5[(Cl,OH)|(Si3O9)2|(Si9O27)2SiO] · 3(OH,H2O)Trig. 3
RastsvetaeviteNa27K8Ca12Fe3Zr6Si52O144(O,OH,H2O)6Cl2Trig. 3m : R3m
TaseqiteNa12Sr3Ca6Fe3Zr3Nb[Cl2|(Si3O9)2|(Si9O27)2SiO] · 3(O,OH,H2O)Trig. 3m : R3m
UM1971-22-SiO:CaClFeHMgMnNaNbZrNa12Ca5(Ce,La,Y,Ca)Zr3(Zr,Nb)(Fe,Mn)3[Si9O24-26(OH)1-3]2[Si3O9]2ClTrig. 3m : R3m
UM1998-21-SiO:CaCeClHMnNaZrNa16Ca6(Mn,Ce)3Zr3(Si3O9)2(Si9O27)2(OH,Cl)4Trig. 3m : R3m
UM1999-36-SiO:CaCeHMnNaNbSrZrNa17(Ca,Ce,Sr)2Mn3(Zr,Nb)4Si25O73(O,OH,F,Cl)5Trig. 3 : R3
UM2000-66-SiO:CaClFeHMnNaNbSrZrNa12(Ca,Mn)6(Sr,Na,K)3(Fe,Mn)3(Zr,Nb)4Si25O66(OH,Cl)11Trig. 3m : R3m
Unnamed (Eudialyte 3248)Na29Ca12Zr6[Si48O132(O,OH)12]{[Na]4[Si]2}{[Mn]3[Mn,Nb,Ti]2}(OH,H2O,Cl)10Trig. 3m (3 2/m) : R3m
Unnamed (Hydrated Hydrous Na-Ca-Mn-Fe-Zr-Ti Silicate Chloride)Na37Ca10Mn2FeZr6Si50(Ti,Nb)2O144(OH)5Cl3·H2OTrig. 3m : R3m
VoronkoviteNa15(Na,Ca,Ce)3(Mn,Ca)3Fe3Zr3Si26O72(OH,O)4Cl · H2OTrig. 3 : R3
Zirsilite-(Ce)Na11-12(Ce,Na)3Ca6Mn3Zr3Nb(Si19O55)(Si3O9)2(CO3)(OH)3 · H2OTrig. 3m : R3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Zirsilite-(Ce)4 photos of Ferrokentbrooksite associated with Zirsilite-(Ce) on
Keldyshite2 photos of Ferrokentbrooksite associated with Keldyshite on
Albite2 photos of Ferrokentbrooksite associated with Albite on
Amphibole Supergroup2 photos of Ferrokentbrooksite associated with Amphibole Supergroup on
Manganokhomyakovite2 photos of Ferrokentbrooksite associated with Manganokhomyakovite on
Aenigmatite2 photos of Ferrokentbrooksite associated with Aenigmatite on
Katophorite1 photo of Ferrokentbrooksite associated with Katophorite on
Quartz1 photo of Ferrokentbrooksite associated with Quartz on
Ferro-katophorite1 photo of Ferrokentbrooksite associated with Ferro-katophorite on

Related Minerals - Nickel-Strunz GroupingHide

9.CO.10AlluaiviteNa19(Ca,Mn)6(Ti,Nb)3Si26O74Cl · 2H2OTrig. 3m (3 2/m) : R3m
9.CO.10EudialyteNa15Ca6(Fe2+,Mn2+)3Zr3[Si25O73](O,OH,H2O)3(OH,Cl)2Trig. 3m (3 2/m) : R3m
9.CO.10Kentbrooksite(Na,REE)15(Ca,REE)6(Mn2+,Fe2+)3Zr3Nb[Si25O74]F2 · 2H2OTrig. 3m : R3m
9.CO.10KhomyakoviteNa12Sr3Ca6Fe3Zr3W[Si25O73](O,OH,H2O)3(OH,Cl)2Trig. 3m : R3m
9.CO.10ManganokhomyakoviteNa12Sr3Ca6Mn3Zr3W[Si25O73](O,OH,H2O)3(OH,Cl)2Trig. 3m : R3m
9.CO.10OneilliteNa15Ca3Mn3Fe2+3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2Trig. 3 : R3
9.CO.10RaslakiteNa15Ca3Fe2+3(Na,Zr)3Zr3Nb<0.5[(Cl,OH)|(Si3O9)2|(Si9O27)2SiO] · 3(OH,H2O)Trig. 3
9.CO.10FeklicheviteNa11Ca9(Fe3+,Fe2+)2Zr3Nb[Si25O73](OH,H2O,Cl,O)5Trig. 3m : R3m
9.CO.10CarbokentbrooksiteNa11-12(Na,Ce)3Ca6Mn3Zr3Nb[(OH)3|CO3|(Si3O9)2|(Si9O27)2SiO] · H2OTrig. 3m : R3m
9.CO.10Zirsilite-(Ce)Na11-12(Ce,Na)3Ca6Mn3Zr3Nb(Si19O55)(Si3O9)2(CO3)(OH)3 · H2OTrig. 3m : R3m
9.CO.10Ikranite(Na,H3O)15(Ca,Mn2+)6Fe3+2Zr3-4[Cl|(H0-3Si3O9)2|{(Si9O27)2,(Si9O27)2SiO}] · 2-3H2OTrig. 3m : R3m
9.CO.10TaseqiteNa12Sr3Ca6Fe3Zr3Nb[Cl2|(Si3O9)2|(Si9O27)2SiO] · 3(O,OH,H2O)Trig. 3m : R3m
9.CO.10RastsvetaeviteNa27K8Ca12Fe3Zr6Si52O144(O,OH,H2O)6Cl2Trig. 3m : R3m
9.CO.10GolysheviteNa10Ca3Ca6Zr3Fe2SiNb(Si3O9)2(Si9O27)2CO3(OH)3 · H2OTrig. 3m : R3m
9.CO.10Labyrinthite(Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3Trig. 3 : R3
9.CO.10Johnsenite-(Ce)Na12Ce3Ca6Mn3Zr3WSi25O73(CO3)(OH)2Trig. 3m : R3m
9.CO.10MogoviditeNa9(Ca,Na)12Fe2Zr3Si25O72(CO3) (OH)4Trig. 3m : R3m
9.CO.10GeorgbarsanoviteNa12(Mn,Sr,REE)3Ca6Fe2+3Zr3NbSi25O76Cl2·H2OTrig. 3m : R3m
9.CO.10Aqualite(H3O)8(Na,K,Sr)5Ca6Zr3Si26O66(OH)9ClTrig. 3 : R3
9.CO.10DualiteNa30(Ca,Na,Ce,Sr)12(Na,Mn,Fe,Ti)6Zr3Ti3Mn[Si51O144](OH,H2O,Cl)9Trig. 3m : R3m
9.CO.10AndrianoviteNa12(K,Sr,Ce)3Ca6Mn3Zr3Nb(Si25O73)(O,H2O,OH)5Trig. 3m : R3m
9.CO.10VoronkoviteNa15(Na,Ca,Ce)3(Mn,Ca)3Fe3Zr3Si26O72(OH,O)4Cl · H2OTrig. 3 : R3
9.CO.10UM1999-36-SiO:CaCeHMnNaNbSrZrNa17(Ca,Ce,Sr)2Mn3(Zr,Nb)4Si25O73(O,OH,F,Cl)5Trig. 3 : R3
9.CO.10UM2000-66-SiO:CaClFeHMnNaNbSrZrNa12(Ca,Mn)6(Sr,Na,K)3(Fe,Mn)3(Zr,Nb)4Si25O66(OH,Cl)11Trig. 3m : R3m
9.CO.10ManganoeudialyteNa14Ca6Mn3Zr3[Si26O72(OH)2](H2O,Cl,O,OH)6Trig. 3m : R3m
9.CO.10UM1990-78-SiO:CaClFeHKNaZr(H3O)7(Na,K)5(Ca,Sr,Mn)6Zr3[Si3O7(O,OH)2]2[Si9O23(O,OH)4]2[SiNaFe(Zr,Ti,Al,Nb)□]Cl1.5(O,OH)Trig. 3m : R3m
9.CO.10UM1971-22-SiO:CaClFeHMgMnNaNbZrNa12Ca5(Ce,La,Y,Ca)Zr3(Zr,Nb)(Fe,Mn)3[Si9O24-26(OH)1-3]2[Si3O9]2ClTrig. 3m : R3m
9.CO.10UM1998-21-SiO:CaCeClHMnNaZrNa16Ca6(Mn,Ce)3Zr3(Si3O9)2(Si9O27)2(OH,Cl)4Trig. 3m : R3m

Related Minerals - Dana Grouping (8th Ed.)Hide,REE)15(Ca,REE)6(Mn2+,Fe2+)3Zr3Nb[Si25O74]F2 · 2H2OTrig. 3m : R3m,Ce)3Ca6Mn3Zr3Nb[(OH)3|CO3|(Si3O9)2|(Si9O27)2SiO] · H2OTrig. 3m : R3m,Sr,Ce)3Ca6Mn3Zr3Nb(Si25O73)(O,H2O,OH)5Trig. 3m : R3m[Si25O73](O,OH,H2O)3(OH,Cl)2Trig. 3m : R3m[Si25O73](O,OH,H2O)3(OH,Cl)2Trig. 3m : R3m 3m : R3m,Sr,REE)3Ca6Fe2+3Zr3NbSi25O76Cl2·H2OTrig. 3m : R3m

Fluorescence of FerrokentbrooksiteHide

Non-fluorescentin short and long-wave ultraviolet light.

Other InformationHide

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 FerrokentbrooksiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Johnsen, O., Grice, J.D., Gault, R.A. (2003) Ferrokentbrooksite, a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. The Canadian Mineralogist: 41: 55-60.

Internet Links for FerrokentbrooksiteHide

Localities for FerrokentbrooksiteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Minas Gerais
Atencio et al.(2000) 4th international conference mineralogy and museuns, program and abstracts volume, p23.
Canada (TL)
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
JOHNSEN, O., GRICE, J.D., and GAULT, R.A. (2003) Ferrokentbrooksite, a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist, 41, 55-60.
  • Kujalleq
    • Narsaq
      • Igaliku (Igaliko)
        • Narsaarsuk Plateau
Johnson, O., Grice, J.D. & Gault, R.A. (2003): Ferrokentbrooksite, a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist. 41: 55-60
  • Telemark
    • Porsgrunn
      • Langesundsfjorden
        • Siktesøya
Johnson, O., Grice, J.D. & Gault, R.A. (2003): Ferrokentbrooksite, a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist. 41: 55-60
      • Mørje
        • Sagåsen
Larsen, A.O., Åsheim, A. and Gault, R. A. (2005): Minerals of the eudialyte group from the Sagåsen larvikite quarry, Porsgrunn, Norway. Norsk Bergverksmuseum Skrifter 30: 58-62
  • Vestfold
    • Larvik
      • Langesundsfjorden
        • Barkevik area
          • Barkevik (Barkevika)
Johnson, O., Grice, J.D. & Gault, R.A. (2003): Ferrokentbrooksite, a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist. 41: 55-60
Larsen, A.O., Åsheim, A. & Gault, R.A. (2005): Ferrokentbrooksite (Brøggers xanthopite) from Skutesundskjær in the Langesundsfjord district, Norway. Norsk Bergverksmuseum Skrift, 30: 63-67
      • Tvedalen
Johnson, O., Grice, J.D. & Gault, R.A. (2003): Ferrokentbrooksite, a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist. 41: 55-60
    • Sandefjord
      • Vesterøya
Åsheim, A., Berge, S.A. & Larsen, A.O. (2008): Sporelementer i ænigmatitt fra larvik plutonkompleks. Norsk Bergverksmuseum Skrift. 38: 63-65
Johnson, O., Grice, J.D. & Gault, R.A. (2003): Ferrokentbrooksite, a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist. 41: 55-60
  • Azores District
    • São Miguel Island
      • Água de Pau Massif
Ridolfi, F. et al. (2003): Evolutionary stages of crystallisation..., Mineralogical Magazine 67(4), 749-767
          • Lake Fogo
Cámara, F., Sokolova, E., Abdu, Y.A., Hawthorne, F.C., Charrier, T., Dorcet, V., Carpentier, J.-F. (2017): Fogoite-(Y), Na3Ca2Y2Ti(Si2O7)2OF3, a Group-I TS-block mineral from the Lagoa do Fogo, the Fogo volcano, the São Miguel Island, the Azores: Description and crystal structure. Mineralogical Magazine, 81, 369–381
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Buriatia (Buryatia)
        • Mama River Basin
          • Maigunda River
Johnson, O., Grice, J.D. & Gault, R.A. (2003): Ferrokentbrooksite, a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist. 41: 55-60
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
        • Eveslogchorr Mt
Arzamastsev, A., Yakovenchuk, V., Pakhomovsky, Y., & Ivanyuk, G. (2008). The Khibina and Lovozero alkaline massifs: Geology and unique mineralization. In Guidbook for 33rd International Geological Congress Excursion (No. 47, p. 58).
        • Kukisvumchorr Mt
          • East slope
            • Tuliok River head
P.M. Kartashov data
  • New Mexico
    • Otero Co.
      • Cornudas Mts
Stephen Stuart collection
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