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Johnsenite-(Ce)

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Formula:
Na
 
12
(Ce,La,Sr,Ca)
 
3
Ca
 
6
Mn
 
3
Zr
 
3
W[(OH,Cl)
 
2
|CO
 
3
|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · H
 
2
O
System:TrigonalColour:Pale yellow to bright ...
Hardness:5 - 6
Member of:Eudialyte Group
Name:Named after Ole Johnsen of the Geological Museum, University of Copenhagen, Denmark


Eudialyte Group

W analogue of Zirsilite-(Ce),

Classification of Johnsenite-(Ce)

IMA status:Approved 2004
Strunz 8th edition ID:8/E.25-57
Nickel-Strunz 10th (pending) edition ID:9.CO.10

9 : SILICATES (Germanates)
C : Cyclosilicates
O : [Si9O27]18- 9-membered rings
Dana 8th edition ID:64.1.2.7

64 : CYCLOSILICATES Rings with Other Anions and Insular Silicate Groups
1 : Rings with Other Anions and Insular Silicate Groups with mixed ring types
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Type Occurrence of Johnsenite-(Ce)

Type Locality:Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
General Appearance of Type Material:deeply etched, skeletal crystals to 4 mm and aggregates to 1 cm
Associated Minerals at type locality:
Zirsilite-(Ce)ZakharoviteTuperssuatsiaiteTitaniteStillwellite-(Ce)
SteacyiteSphaleriteRhodochrositeQuartzPyrrhotite
PyritePectoliteNatroliteMolybdeniteMicrocline
GalenaEpididymiteDawsoniteCerite-(Ce)Catapleiite
CalciteApophyllite-(KF)Amphibole GroupAlbiteAegirine

Physical Properties of Johnsenite-(Ce)

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Pale yellow to bright orange
Streak:White
Hardness (Mohs):5 - 6
Tenacity:Brittle
Cleavage:None Observed
Parting:None observed
Fracture:Irregular/Uneven
Density (measured):3.24 g/cm3
Density (calculated):3.23 g/cm3

Crystallography of Johnsenite-(Ce)

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Cell Parameters:a = 14.237Å, c = 30.03Å
Ratio:a:c = 1 : 2.109
Unit Cell Volume:V 5271 ų
Z:3
Morphology:Deeply etched, skeletal crystals to 4 mm and aggregates of crystals to 1 cm.
Twinning:No indications observed.
X-Ray Powder Diffraction:
d-spacingIntensity
11.308 (95)
9.460 (81)
4.295 (34)
3.547 (36)
3.395 (38)
3.167 (75)
2.968 (100)
2.849 (81)
Comments:Format: d/Å (I/%) (hkl),
from type description

Optical Data of Johnsenite-(Ce)

Type:Uniaxial (-)
Pleochroism:Non-pleochroic

Chemical Properties of Johnsenite-(Ce)

Formula:
Na
 
12
(Ce,La,Sr,Ca)
 
3
Ca
 
6
Mn
 
3
Zr
 
3
W[(OH,Cl)
 
2
|CO
 
3
|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · H
 
2
O
All elements listed in formula:C, Ca, Ce, Cl, H, La, Mn, Na, O, Si, Sr, W, Zr
Analytical Data:Mean values out of eight electron microprobe analyses, three of which were carried out on the grain used for the structure determination.
The CO2 and H2O contents were calculated by stoichiometry based on the results from crystal-structure analysis. The empirical formula is based on 29 Si, Zr, Ti, Hf, Nb and W atoms and cations, respectively, and one carbonate anion (as determined in the crystal-structure analysis).
Na2O (10.47)
K2O (0.25)
CaO (8.98)
SrO (1.60)
MnO (5.43)
FeO (1.61)
Y2O3 (0.70)
La2O3 (1.56)
Ce2O3 (3.01)
Pr2O3 (1.14)
Nd2O3 (0.89)
Sm2O3 (0.12)
Gd2O3 (0.33)
Dy2O3 (0.14)
TiO2 (0.73)
ZrO2 (9.60)
HfO2 (0.04)
Nb2O5 (0.82)
WO3 (5.23)
SiO2 (43.16)
Cl (0.77)
CO2 (1.27)
H2O (0.32)

O = Cl –0.17

total 97.99 wt. %
Empirical Formula:
Na
 
11.74
(REE
 
1.00
Sr
 
0.54
Ca
 
0.51
Y
 
0.22
K
 
0.19
)
 
2.46
(Ca
 
5.06
REE
 
0.50
Mn
 
0.44
)
 
6
(Mn
 
2.22
Fe
 
0.78
)
 
3
(Zr
 
2.71
Ti
 
0.32
Hf
 
0.01
)
 
3.04
(W
 
0.78
Nb
 
0.21
)
 
0.99
Si
 
24.97
O
 
73
(CO
 
3
)(OH,Cl
 
0.75
)
 
1.75

Relationship of Johnsenite-(Ce) to other Species

Member of:Eudialyte Group
Other Members of Group:

- +
Alluaivite
Na
 
19
(Ca,Mn)
 
6
(Ti,Nb)
 
3
Si
 
26
O
 
74
Cl · 2H
 
2
O
Andrianovite
Na
 
12
(K,Sr,Ce)
 
3
Ca
 
6
Mn
 
3
Zr
 
3
Nb(Si
 
25
O
 
73
)(O,H
 
2
O,OH)
 
5
Aqualite
(H
 
3
O)
 
8
(Na,K,Sr)
 
5
Ca
 
6
Zr
 
3
Si
 
26
O
 
66
(OH)
 
9
Cl
Carbokentbrooksite
Na
 
11-12
(Na,Ce)
 
3
Ca
 
6
Mn
 
3
Zr
 
3
Nb[(OH)
 
3
|CO
 
3
|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · H
 
2
O
Dualite
Na
 
30
(Ca,Na,Ce,Sr)
 
12
(Na,Mn,Fe,Ti)
 
6
Zr
 
3
Ti
 
3
Mn[Si
 
51
O
 
144
](OH,H
 
2
O,Cl)
 
9
Eudialyte
Na
 
15
Ca
 
6
(Fe
2+
 
,Mn
2+
 
)
 
3
Zr
 
3
[Si
 
25
O
 
73
](O,OH,H
 
2
O)
 
3
(OH,Cl)
 
2
Feklichevite
Na
 
11
Ca
 
9
(Fe
3+
 
,Fe
2+
 
)
 
2
Zr
 
3
Nb[Si
 
25
O
 
73
](OH,H
 
2
O,Cl,O)
 
5
Fengchengite
Na
 
12
◻
 
3
(Ca,Sr)
 
6
Fe
3+
3
 Zr
 
3
Si(Si
 
25
O
 
73
)(H
 
2
O,OH)
 
3
(OH,Cl)
 
2
Ferrokentbrooksite
Na
 
15
Ca
 
6
(Fe,Mn)
 
3
Zr
 
3
NbSi
 
25
O
 
73
(O,OH,H
 
2
O)
 
3
Cl
 
2
Georgbarsanovite
Na
 
12
(Mn,Sr,REE)
 
3
Ca
 
6
Fe
2+
3
Zr
 
3
NbSi
 
25
O
 
76
Cl
 
2
·H
 
2
O
Golyshevite
Na
 
10
Ca
 
3
Ca
 
6
Zr
 
3
Fe
 
2
SiNb(Si
 
3
O
 
9
)
 
2
(Si
 
9
O
 
27
)
 
2
CO
 
3
(OH)
 
3
 · H
 
2
O
Ikranite
(Na,H
 
3
O)
 
15
(Ca,Mn
2+
 
)
 
6
Fe
3+
2
Zr
 
3-4
[Cl|(H
 
0-3
Si
 
3
O
 
9
)
 
2
|{(Si
 
9
O
 
27
)
 
2
,(Si
 
9
O
 
27
)
 
2
SiO}] · 2-3H
 
2
O
Kentbrooksite
(Na,REE)
 
15
(Ca,REE)
 
6
(Mn
2+
 
,Fe
2+
 
)
 
3
Zr
 
3
Nb[Si
 
25
O
 
74
]F
 
2
 · 2H
 
2
O
Khomyakovite
Na
 
12
Sr
 
3
Ca
 
6
Fe
 
3
Zr
 
3
W[Si
 
25
O
 
73
](O,OH,H
 
2
O)
 
3
(OH,Cl)
 
2
Labyrinthite
(Na,K,Sr)
 
35
Ca
 
12
Fe
 
3
Zr
 
6
TiSi
 
51
O
 
144
(O,OH,H
 
2
O)
 
9
Cl
 
3
Manganoeudialyte
Na
 
14
Ca
 
6
Mn
 
3
Zr
 
3
[Si
 
26
O
 
72
(OH)
 
2
](H
 
2
O,Cl,O,OH)
 
6
Manganokhomyakovite
Na
 
12
Sr
 
3
Ca
 
6
Mn
 
3
Zr
 
3
W[Si
 
25
O
 
73
](O,OH,H
 
2
O)
 
3
(OH,Cl)
 
2
Mogovidite
Na
 
9
(Ca,Na)
 
5
Ca
 
6
Zr
 
3
Fe
 
2
(Si,Nb)[(OH,H
 
2
O)
 
3
|Cl
 
0.3
|CO
 
3
|(Si
 
3
O
 
9
)
 
2
(Si
 
9
O
 
27
)
 
2
]
Oneillite
Na
 
15
Ca
 
3
Mn
 
3
Fe
2+
3
Zr
 
3
Nb(Si
 
25
O
 
73
)(O,OH,H
 
2
O)
 
3
(OH,Cl)
 
2
Raslakite
Na
 
15
Ca
 
3
Fe
2+
3
(Na,Zr)
 
3
Zr
 
3
Nb
 
<0.5
[(Cl,OH)|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · 3(OH,H
 
2
O)
Rastsvetaevite
Na
 
27
K
 
8
Ca
 
12
Fe
 
3
Zr
 
6
Si
 
52
O
 
144
(O,OH,H
 
2
O)
 
6
Cl
 
2
Taseqite
Na
 
12
Sr
 
3
Ca
 
6
Fe
 
3
Zr
 
3
Nb[Cl
 
2
|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · 3(O,OH,H
 
2
O)
UM1998-21-SiO:CaCeClHMnNaZr
Na
 
16
Ca
 
6
(Mn,Ce)
 
3
Zr
 
3
(Si
 
3
O
 
9
)
 
2
(Si
 
9
O
 
27
)
 
2
(OH,Cl)
 
4
Voronkovite
Na
 
15
(Na,Ca,Ce)
 
3
(Mn,Ca)
 
3
Fe
 
3
Zr
 
3
Si
 
26
O
 
72
(OH,O)
 
4
Cl · H
 
2
O
Zirsilite-(Ce)
Na
 
11-12
(Ce,Na)
 
3
Ca
 
6
Mn
 
3
Zr
 
3
Nb[(OH)
 
3
|CO
 
3
|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
9.CO.10Alluaivite
Na
 
19
(Ca,Mn)
 
6
(Ti,Nb)
 
3
Si
 
26
O
 
74
Cl · 2H
 
2
O
9.CO.10Eudialyte
Na
 
15
Ca
 
6
(Fe
2+
 
,Mn
2+
 
)
 
3
Zr
 
3
[Si
 
25
O
 
73
](O,OH,H
 
2
O)
 
3
(OH,Cl)
 
2
9.CO.10Ferrokentbrooksite
Na
 
15
Ca
 
6
(Fe,Mn)
 
3
Zr
 
3
NbSi
 
25
O
 
73
(O,OH,H
 
2
O)
 
3
Cl
 
2
9.CO.10Kentbrooksite
(Na,REE)
 
15
(Ca,REE)
 
6
(Mn
2+
 
,Fe
2+
 
)
 
3
Zr
 
3
Nb[Si
 
25
O
 
74
]F
 
2
 · 2H
 
2
O
9.CO.10Khomyakovite
Na
 
12
Sr
 
3
Ca
 
6
Fe
 
3
Zr
 
3
W[Si
 
25
O
 
73
](O,OH,H
 
2
O)
 
3
(OH,Cl)
 
2
9.CO.10Manganokhomyakovite
Na
 
12
Sr
 
3
Ca
 
6
Mn
 
3
Zr
 
3
W[Si
 
25
O
 
73
](O,OH,H
 
2
O)
 
3
(OH,Cl)
 
2
9.CO.10Oneillite
Na
 
15
Ca
 
3
Mn
 
3
Fe
2+
3
Zr
 
3
Nb(Si
 
25
O
 
73
)(O,OH,H
 
2
O)
 
3
(OH,Cl)
 
2
9.CO.10Raslakite
Na
 
15
Ca
 
3
Fe
2+
3
(Na,Zr)
 
3
Zr
 
3
Nb
 
<0.5
[(Cl,OH)|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · 3(OH,H
 
2
O)
9.CO.10Feklichevite
Na
 
11
Ca
 
9
(Fe
3+
 
,Fe
2+
 
)
 
2
Zr
 
3
Nb[Si
 
25
O
 
73
](OH,H
 
2
O,Cl,O)
 
5
9.CO.10Carbokentbrooksite
Na
 
11-12
(Na,Ce)
 
3
Ca
 
6
Mn
 
3
Zr
 
3
Nb[(OH)
 
3
|CO
 
3
|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · H
 
2
O
9.CO.10Zirsilite-(Ce)
Na
 
11-12
(Ce,Na)
 
3
Ca
 
6
Mn
 
3
Zr
 
3
Nb[(OH)
 
3
|CO
 
3
|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · H
 
2
O
9.CO.10Ikranite
(Na,H
 
3
O)
 
15
(Ca,Mn
2+
 
)
 
6
Fe
3+
2
Zr
 
3-4
[Cl|(H
 
0-3
Si
 
3
O
 
9
)
 
2
|{(Si
 
9
O
 
27
)
 
2
,(Si
 
9
O
 
27
)
 
2
SiO}] · 2-3H
 
2
O
9.CO.10Taseqite
Na
 
12
Sr
 
3
Ca
 
6
Fe
 
3
Zr
 
3
Nb[Cl
 
2
|(Si
 
3
O
 
9
)
 
2
|(Si
 
9
O
 
27
)
 
2
SiO] · 3(O,OH,H
 
2
O)
9.CO.10Rastsvetaevite
Na
 
27
K
 
8
Ca
 
12
Fe
 
3
Zr
 
6
Si
 
52
O
 
144
(O,OH,H
 
2
O)
 
6
Cl
 
2
9.CO.10Golyshevite
Na
 
10
Ca
 
3
Ca
 
6
Zr
 
3
Fe
 
2
SiNb(Si
 
3
O
 
9
)
 
2
(Si
 
9
O
 
27
)
 
2
CO
 
3
(OH)
 
3
 · H
 
2
O
9.CO.10Labyrinthite
(Na,K,Sr)
 
35
Ca
 
12
Fe
 
3
Zr
 
6
TiSi
 
51
O
 
144
(O,OH,H
 
2
O)
 
9
Cl
 
3
9.CO.10Mogovidite
Na
 
9
(Ca,Na)
 
5
Ca
 
6
Zr
 
3
Fe
 
2
(Si,Nb)[(OH,H
 
2
O)
 
3
|Cl
 
0.3
|CO
 
3
|(Si
 
3
O
 
9
)
 
2
(Si
 
9
O
 
27
)
 
2
]
9.CO.10Georgbarsanovite
Na
 
12
(Mn,Sr,REE)
 
3
Ca
 
6
Fe
2+
3
Zr
 
3
NbSi
 
25
O
 
76
Cl
 
2
·H
 
2
O
9.CO.10Aqualite
(H
 
3
O)
 
8
(Na,K,Sr)
 
5
Ca
 
6
Zr
 
3
Si
 
26
O
 
66
(OH)
 
9
Cl
9.CO.10Dualite
Na
 
30
(Ca,Na,Ce,Sr)
 
12
(Na,Mn,Fe,Ti)
 
6
Zr
 
3
Ti
 
3
Mn[Si
 
51
O
 
144
](OH,H
 
2
O,Cl)
 
9
9.CO.10Andrianovite
Na
 
12
(K,Sr,Ce)
 
3
Ca
 
6
Mn
 
3
Zr
 
3
Nb(Si
 
25
O
 
73
)(O,H
 
2
O,OH)
 
5
9.CO.10Voronkovite
Na
 
15
(Na,Ca,Ce)
 
3
(Mn,Ca)
 
3
Fe
 
3
Zr
 
3
Si
 
26
O
 
72
(OH,O)
 
4
Cl · H
 
2
O
9.CO.10UM1999-36-SiO:CaCeHMnNaNbSrZr
Na
 
17
(Ca,Ce,Sr)
 
2
Mn
 
3
(Zr,Nb)
 
4
Si
 
25
O
 
73
(O,OH,F,Cl)
 
5
9.CO.10UM2000-66-SiO:CaClFeHMnNaNbSrZr
Na
 
12
(Ca,Mn)
 
6
(Sr,Na,K)
 
3
(Fe,Mn)
 
3
(Zr,Nb)
 
4
Si
 
25
O
 
66
(OH,Cl)
 
11
9.CO.10Manganoeudialyte
Na
 
14
Ca
 
6
Mn
 
3
Zr
 
3
[Si
 
26
O
 
72
(OH)
 
2
](H
 
2
O,Cl,O,OH)
 
6
9.CO.10UM1990-78-SiO:CaClFeHKNaZr
(H
 
3
O)
 
7
(Na,K)
 
5
(Ca,Sr,Mn)
 
6
Zr
 
3
[Si
 
3
O
 
7
(O,OH)
 
2
]
 
2
[Si
 
9
O
 
23
(O,OH)
 
4
]2[SiNaFe(Zr,Ti,Al,Nb)□]Cl
 
1.5
(O,OH)
9.CO.10UM-1990-79-SiO:CaClFeHMnNaNbREEZr
Na
 
14
Ca
 
5
(Mg,Ca,Mn)Zr
 
3
(Si
 
3
O
 
9
)
 
2
(Si
 
9
O
 
27
)
 
2
(Si,Nb,Al,Zr)
 
2
(Fe,Zr)
 
3
(Mn,Na,Ce,La,Y)(Na,H
 
2
O,K,Sr)(OH)
 
4-5
(OH,Cl)
9.CO.10UM1971-22-SiO:CaClFeHMgMnNaNbZr
Na
 
12
Ca
 
5
(Ce,La,Y,Ca)Zr
 
3
(Zr,Nb)(Fe,Mn)
 
3
[Si
 
9
O
 
24-26
(OH)
 
1-3
]
 
2
[Si
 
3
O
 
9
]
 
2
Cl
9.CO.10UM1998-21-SiO:CaCeClHMnNaZr
Na
 
16
Ca
 
6
(Mn,Ce)
 
3
Zr
 
3
(Si
 
3
O
 
9
)
 
2
(Si
 
9
O
 
27
)
 
2
(OH,Cl)
 
4

Other Names for Johnsenite-(Ce)

Synonyms:
IMA2004-026
Other Languages:
German:Johnsenit-(Ce)

Other Information

Fluorescence in UV light:None (SW & LW UV).
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Johnsenite-(Ce)

Reference List:

- +
Grice, J.D. & Gault, R.A. (2006): Johnsenite-(Ce), a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist 44: 105-115.

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    • Localities for Johnsenite-(Ce)

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    		Grice, J.D. & Gault, R.A. (2006): Johnsenite-(Ce), a new member of the eudialyte group from Mont Saint-Hilaire, Quebec, Canada. Canadian Mineralogist 44:105-115
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