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Kentbrooksite

Pictures (7 Images total)

Kentbrooksit-Kristall mit Aegirin
Views (File:
1243879577
): 1218
Kentbrooksit-Kristall mit Aegirin
Kristallgröße: 2 mm; Fundort: Lovchorrite Mine, Hackman-Tal, Yukspor, Khibiny, Kola, Russland
Copyright: Pavel M. Kartashov; Contribution: Philip Blümner
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Yukspor/Hackman-Tal/Lovchorrite Mine
Mineral: Kentbrooksite
Image: 1243879577
Rating: 7.5 (votes: 2)
License: Usage for Mineralienatlas project only
Kentbrooksit-Kristall mit Aegirin

Kristallgröße: 2 mm; Fundort: Lovchorrite Mine, Hackman-Tal, Yukspor, Khibiny, Kola, Russland

Copyright: Pavel M. Kartashov
Contribution: Philip Blümner 2009-06-01
Locality: Lovchorrite Mine / Hackman-Tal / Yukspor / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Kentbrooksit xx
Views (File:
1581873056
): 634
Kentbrooksit xx
Lovtchorrit Mine,Hackman-Tal am Mt.Yukspor,Chibiny/Kola,Rußland; Bildbreite 6,7 mm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Yukspor/Hackman-Tal/Lovchorrite Mine
Mineral: Kentbrooksite
Image: 1581873056
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Kentbrooksit xx

Lovtchorrit Mine,Hackman-Tal am Mt.Yukspor,Chibiny/Kola,Rußland; Bildbreite 6,7 mm

Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2020-02-16
Locality: Lovchorrite Mine / Hackman-Tal / Yukspor / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Kentbrooksit (xx) mit Aegirin in Nephelin-Syenit
Views (File:
1243879718
): 1072
Kentbrooksit (xx) mit Aegirin in Nephelin-Syenit
Größe: 80x50x25 mm; Fundort: Umbozero, Alluaiv, Lovozero, Kola Peninsula, Russland
Copyright: Pavel M. Kartashov; Contribution: Philip Blümner
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Alluaiv/Umbozero
Mineral: Kentbrooksite
Image: 1243879718
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Kentbrooksit (xx) mit Aegirin in Nephelin-Syenit

Größe: 80x50x25 mm; Fundort: Umbozero, Alluaiv, Lovozero, Kola Peninsula, Russland

Copyright: Pavel M. Kartashov
Contribution: Philip Blümner 2009-06-01
Locality: Umbozero / Alluaiv / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Kentbrooksit
Views (File:
1360628747
): 639
Kentbrooksit
Bildbreite: 4 mm, Fundort: Lovchorrite Mine, Hackman-Tal, Yukspor, Khibiny, Kola-Halbinsel, Murmansk, Russland
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Yukspor/Hackman-Tal/Lovchorrite Mine
Mineral: Kentbrooksite
Image: 1360628747
License: Usage for Mineralienatlas project only
Kentbrooksit

Bildbreite: 4 mm, Fundort: Lovchorrite Mine, Hackman-Tal, Yukspor, Khibiny, Kola-Halbinsel, Murmansk, Russland

Copyright: Luigi Chiappino
Contribution: thdun5 2013-02-12
Locality: Lovchorrite Mine / Hackman-Tal / Yukspor / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Kentbrooksit
Views (File:
1360628777
): 658
Kentbrooksit
Bildbreite: 8 mm, Fundort: Lovchorrite Mine, Hackman-Tal, Yukspor, Khibiny, Kola-Halbinsel, Murmansk, Russland
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Yukspor/Hackman-Tal/Lovchorrite Mine
Mineral: Kentbrooksite
Image: 1360628777
License: Usage for Mineralienatlas project only
Kentbrooksit

Bildbreite: 8 mm, Fundort: Lovchorrite Mine, Hackman-Tal, Yukspor, Khibiny, Kola-Halbinsel, Murmansk, Russland

Copyright: Luigi Chiappino
Contribution: thdun5 2013-02-12
Locality: Lovchorrite Mine / Hackman-Tal / Yukspor / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color gelbbraun, hell rötlichbraun
Streak color weiß
Hardness (Mohs) 5.00 - 6.00
Cleavages no distict cleavage
Fracture uneben
Crystal System trigonal, R3m

Chemism

Chemical formula

Na15(Ca,Ce,La)6(Mn2+,Fe2+)3Zr3Nb[O|(F,Cl,OH)|Si3O9|Si9O27]2·2H2O

Chemical composition

Calcium, Cerium, Chlor, Eisen, Lanthanum, Mangan, Natrium, Niob, Silicium, Zirconium, Fluor, Sauerstoff, Wasserstoff

Unit weight: 3298.267246575 u; Number of atoms in the formula: 134.2

Info

Empirical formula:

Na15(Ca0.6Ce0.3La0.1)6(Mn0.75Fe0.25)3Zr3Nb[O(F0.6Cl0.3(OH)0.1)Si3O9Si9O27]2·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.13

4.2

3.13

1.0079470

4.2333774

Oxygen

O

36.96

76.2

56.78

15.9994300

1,219.1565660

Fluorine

F

0.69

1.2

0.89

18.9984033

22.7980839

Sodium

Na

10.46

15

11.18

22.9897702

344.8465530

Silicon

Si

20.44

24

17.88

28.0855300

674.0527200

Chlorine

Cl

0.64

0.6

0.45

35.4532000

21.2719200

Calcium

Ca

4.37

3.6

2.68

40.0784000

144.2822400

Manganese

Mn

3.75

2.25

1.68

54.9380499

123.6106123

Iron

Fe

1.27

0.75

0.56

55.8452000

41.8839000

Zirconium

Zr

8.30

3

2.24

91.2242000

273.6726000

Niobium

Nb

2.82

1

0.75

92.9063820

92.9063820

Lanthanum

La

2.53

0.6

0.45

138.9055200

83.3433120

Cerium

Ce

7.65

1.8

1.34

140.1161000

252.2089800

Analysis wt%

Ø SiO2 : 45.34, Nb2O5 : 2.26, ZrO2 : 11.08, TiO2 : 0.56, FeO : 1.58, MnO : 8.01, La2O3 : 2.23, Ce2O3 : 2.44, Nd2O3 : 0.69, Y2O3 : 1.46, SrO : 0.49, CaO : 5.62, Na2O : 14.51, K2O : 0.43, F : 0.88, H2O : 1.28, Ln2O3 : 6.82 (Ref: European Journal of Mineralogy 98)

Strunz 9th edition incl. updates

9.CO.10

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
O: ~[Si9O27]18- neuner-Ringe
10:Eudialyt-Gruppe

Lapis Classification

VIII/E.25-030

VIII: SILIKATE
E: Ringsilikate
25: Neunerringe + Dreierringe; Eudialyt-Gruppe

Classification by Hölzel

9.CG.230

9: SILICATES
C: Cyclosilicates
G: ~[Si3O9]6-- + ~[Si9O27]18--Rings Eudialyte-Group
2: Eudialyte-Subgroup - c=30, Mn- Series

Dana 8th edition

64.01.01.03

64: Cyclosilicates Cyclosilicates
01: Cyclosilicates Cyclosilicates Cyclosilicate Rings with Other Anions and Insular Silicate Groups with mixed ring types
01: Eudialyte Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Eudialyte group

Optical Properties

Color

gelbbraun, hell rötlichbraun

Streak color

weiß

max. Birefringence

0.005

Birefringence chart\! Kentbrooksite title=Birefringence chart Kentbrooksite

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

1.628

RI value γ / ε

1.623

Ri mean

1.626

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

160

Space Group

R3m

Cell parameters a (Å)

14.169

Cell parameters b (Å)

-

Cell parameters c (Å)

30.085

Cell parameters a/b or c/a

2.123

Cell parameters c/b

-

Z

3

Volume (ų)

5230.691

X-Ray Powder Diffraction

11.4(40),
7.09(40),
5.682(30),
4.295(30),
3.380(40),
2.961(90),
2.839(100),
1.770(30)

XRD chart Kentbrooksite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.00 - 6.00

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.10 (gemessen)

3.141 ( ρ calc. Mineralienatlas )

Cleavages

no distict cleavage

Fracture

uneben

Tenacity

spröde

Preface

Author (Name, Year)

Johnsen & Grice & Gault, 1998

References

European Journal of Mineralogy 10 (1998), 207

IMA group assignments


 
 
Na15[(Ce1.5Na1.5)Mn3]Mn2Zr3☐Si[Si24O69(OH)3](OH)2·H2O
trigonal
R3

 
 
(H3O)8(Na, K, Sr)5Ca6Zr3Si26O66(OH)9Cl
trigonal
R3

 
 
Na11-12(Na,Ce)3Ca6Mn3Zr3Nb[(OH)3|CO3|(Si3O9)2|(Si9O27)2·SiO]·H2O
trigonal
R3m

 
 
Na30(Ca,Na,Ce,Sr)12(Na,Mn,Fe,Ti)6Zr3Ti3MnSi51O144(OH,H2O,Cl)9
trigonal
R3m

 
 
Na15Ca6(Fe2+,Mn2+)3Zr3[(Cl,OH)|Si(O,OH,H2O)2|Si3O9|Si9O27]2
trigonal
R3m

 
 
Na11Ca9(Fe3+,Fe2+)2Zr3Nb(Si25O73)(OH,H2O,Cl,O)5
trigonal
R3m

 
 
Na15Ca6Fe2+3Zr3Nb(Si25O73)(O,OH,H2O)3(F,Cl)2
trigonal
R3m

 
 
Na12(Mn,Sr,REE)3Ca6Fe2+3Zr3NbSi25O76Cl2·H2O
trigonal
R3m

 
 
(Na,Ca)10Ca9Fe2Zr3NbSi25O72(OH)3CO3·H2O
trigonal
R3m

 
 
(Na,H3O)15(Ca,Mn)6Fe23+Zr3-4[Cl|{Si3O6(O,OH)3}2|(Si9O27)2·0-1 SiO] ·2-3 H2O
trigonal
R3m

 
 
(H3O,Na)14Ca6Mn2Zr3Si26O72(OH)2·3H2O
trigonal
R3m

 
 
Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(OH)3(CO3)·H2O
trigonal
R3m

 
 
Na15(Ca,Ce,La)6(Mn2+,Fe2+)3Zr3Nb[O|(F,Cl,OH)|Si3O9|Si9O27]2·2H2O
trigonal
R3m

 
 
Na12Sr3Ca6(Fe2+Mn2+)3Zr3(W,Nb)[(OH,Cl)|Si0.5(O,OH)2|Si3O9|Si9O27]2
trigonal
R3m

 
 
Na14Ca6Mn3Zr3[Si26O72(OH)2](H2O,Cl,O,OH)6
trigonal
R3m

 
 
Na12Sr3Ca6(Mn2+,Fe2+)3Zr3(W,Nb)[(OH,Cl)|Si0.5(O,OH)2|Si3O9|Si9O27]2
trigonal
R3m

 
 
Na9(Ca,Na)6Ca6Fe2Zr3☐Si25O72(CO3)(OH)4
trigonal
R3m

 
 
Na14Ca6Zr3[Na2(Fe,Mn)][Si26O72](OH)2(H2O1.0Cl0.6S2-0.5)(OH,H2O)2.5
trigonal
R3m

 
 
Na9Sr3[(H2O)2Na]Ca6Mn3Zr3NbSi(Si24O72)O(OH)3 (CO3)·H2O
trigonal
R3m

 
 
Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2
trigonal
R3

 
 
Na15Ca3Fe3(Na,Zr)3Zr3Nb<0.5[(Cl,OH)|(Si3O9)2|(Si9O27)2·SiO]·3(OH,H2O)
trigonal
R3

 
 
Na27K8Ca12Fe3Zr6Si52O144(OH,O)6Cl2
trigonal
R3m

 
 
(H3O)12Na3(Ca3Mn3)(Na2Fe)Zr3Si[Si24O69(OH)3](OH)Cl⋅H2O
trigonal
R3

 
 
Na15(Ca3Mn3)(Na2Fe)Zr3Si26O72(OH)3·H2O
trigonal
R3

 
 
Na8Mn2+3Ca6(Fe3+,Mn2+)3Zr3NbSi24(Si,☐,Ti)O72(O,OH)3Cl·4H2O
trigonal
R3m

 
 
Na12Sr3Ca6Fe3Zr3NbSi25O73(O,OH,H2O)3Cl2
trigonal
R3m

 
 
Na12Ca5(Ce,La,Y,Ca)Zr3(Zr,Nb)(Fe,Mn)3[Si9O24-26(OH)1-3]2[Si3O9]2Cl
trigonal
R3m

 
 
(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)
trigonal
R3m

 
 
Na14Ca4(Mn,Ca)2Zr3(Si3O9)2(Si9O27)2(Si,Nb,Al,Zr)2(Fe,Mn,Al,Ti)3(Na,Ce,La,Y,Mn)(Na,H2O,K,Sr)(OH)7-8
 
 

 
 
Na16Ca6(Mn,Ce)3Zr3(Si3O9)2(Si9O27)2(OH,Cl)4 · nH2O
trigonal
R3m

 
 
Na12(Ca,Mn)6(Sr,Na,K)3(Fe,Mn)3(Zr,Nb)4Si25O66(OH,Cl)11
trigonal
R3m

 
 
Zr4(Ca,Na,Mn,Fe)6(Fe,Mn,Ti)3Na17Si25O75(Al,Nb,Ti)Cl(OH)4.H2O
trigonal
R3m

 
 
Na14(Na,Ca,Ce)(Mn,Ca,Ce)[Fe1.55(Zr,Na)(◻,Ti,Nb)]Zr3(Si,Al)(Si3O9)2(Si9O27)2(OH,O)4(F ,Cl) · H2O
 
 

 
 
Na12(Na,K,Mn,Sr)2Ca5(Ca,Mn)(Zr,Hf)3(Fe,◻,Ta)3(Si,Nb,W)(Si,Al,Ti)Si24O72(OH,O)3.5Cl · 1.2H2O
trigonal
R3m

 
 
Na16Ca6(Fe,Mn)3Zr3(Ti,Nb)Si26O72FCl0.5 · nH2O
trigonal
R3m

 
 
[(H3O)9.32Na5.86K0.53Ba0.36Sr0.15][Ca5.22Sr0.49Ce0.16Mn0.13][Zr2.42Ti0.54Hf0.02Nb0.02][Na1.48(Fe0.10(H2O)0.1)][Si1.0(OH)1.0][Si0.44Al0.06(OH)0.50][Si3O9]2[Si9O26.25(OH)0.75]2Cl1.0·1H2O
 
 

 
 
[(H3O)9.26Na2.12K1.20Ba0.46Sr0.48][Ca5.76Ce0.24][Zr2.92Ti0.08][Na0.62(Fe0.23Mn0.11(H2O)0.34)][(Si0.57)(Si0.21Al0.19Nb0.03)(OH)1.44][(Si0.45)(Ti0.21)(Si0.34)(O,OH)0.34(OH)1.08][Si0.19(OH)0.57] [Si3O9]2[Si9O27]2Cl1.05·0.8H2O
 
 

 
 
[(H3O)10.85Na3.3Sr0.48K0.21Ce0.2Y0.1Ba0.04][Ca2.1Na0.9][Ca2.4Na0.3Mn0.3][Zr2.97Hf0.03][Fe1.32Mn0.6O1.44(H2O)1.80][(Ti0.22Nb0.02)(Si0.23)(Si0.19)(OH)0.42][(Si0.44)(Nb0.1Al0.1)(Nb0.0)(OH)0.44][Si3O9]2[Si9O26.01(OH)0.99]2Cl1.0·1.19H2O
 
 

 
 
[(H3O)11.61Na3.0Sr0.63Ce0.22K0.2Y0.05Ba0.03][Ca2.25Na0.75][Ca2.4Mn0.6][Zr2.98Hf0.02][Fe3+0.66Mn0.3Mn0.3(H2O)1.43(OH)0.79][(Ti0.16Al0.07Mg0.03)(Si0.17)(OH)0.17][(Si0.50)(Si0.31)(Nb0.18Ta0.01)(OH)0.81][Si3O9]2[Si9O26.14(OH)0.86]2Cl1.1·0.63H2O
 
 

 
 
[(H3O)5.58Na5.25Ce0.63K0.3Y0.19Sr0.05][Ca3][Ca1.71Mn1.29][Zr2.96Hf0.04][(Fe3+1.0Fe2+0.35)(Fe3+0.57)(Zr0.32Mn0.22)(O,OH)1.77(H2O)1.34][(Zr0.18)(Si0.5)(OH)0.5][(Nb0.41)(Al0.2Ti0.05)(Si018)(OH)0.93][Si3O9]2[Si9O26.28(OH)0.72]2Cl0.2·1.45H2O
 
 

 
 
[(H3O)8.53Na3.51Sr0.55Ce0.45Y0.3Ba0.15K0.06][Ca2.25Sr0.45Na0.3][Ca2.4Mn0.6][Zr2.97Hf0.03][(Mn0.64Fe0.38)O0.3(H2O)0.72][(Si0.49)(Si0.41)(Nb0.1)(OH)0.9][(Si0.29)(Si0.2)(Ti0.1Mg0.07Nb0.02)(OH)1.06][Si3O9]2[Si9O26.52(OH)0.48]2·2.12H2O
 
 

 
 
Na15(Ca3Mn3)Zr3(Fe,Zr)3SiSi(Si3O9)2(Si9O27)2O2(OH,F,Cl)3 · 2H2O
 
 

 
 
Na15Ca3(Mn,Fe)3Zr3(Zr,Na)3(Si,Nb)(S,Ti,Si)(Si3O9)2(Si9O27)2(O,OH)5(Cl,F,H2O)
 
 

 
 
Na33Ca12Zr6 Mn3(Mn,Nb,Ti)2Si50O132(O,OH)12(OH,H2O,Cl)10
 
 

 
 
[Na,(H3O)]15(Ca3Mn3)Na3Zr3(Si,Ti)[Si25O72OH](OH)2 · 2H2O
 
 

 
 
Na14Ca5(Mg,Ca,Mn)Zr3(Si3O9)2(Si9O27)2(Si,Nb,Al,Zr)2(Fe,Zr)3(Mn,Na,Ce,La,Y)(Na,H2O,K,Sr)(OH)4-5(OH,Cl)
 
 

 
 
Na29Ca12Zr6[Si48O132(O,OH)12]{[Na]4[Si]2}{[Mn]3[Mn,Nb,Ti]2}(OH,H2O,Cl)10
trigonal
R3m

 
 
Na37Ca10Mn2FeZr6Si50(Ti,Nb)2O144(OH)5Cl3 · H2O
trigonal
R3m

 
 
(Na,☐)12(Ce,Na)3Ca6Mn3Zr3NbSi25O73(OH)3(CO3)·H2O
trigonal
R3m

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Actuality: 09. Jul 2024 - 05:40:34

Other languages

German

Kentbrooksit

Spanish

Kentbrooksita

French

Kentbrooksite

English

Kentbrooksite

Russian

Кентбруксит

CNMNC (IMA)-Number

IMA 1996-023

CNMNC symbol

Symbol

Ktb

Locations with GPS information

IDs

GUSID (Global unique identifier short form) aVEZuWbhiECkJ9UQyK1fgQ
GUID (Global unique identifier) B9195169-E166-4088-A427-D510C8AD5F81
Database ID 1919