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Eveslogite

Big Photo

Fersman Gorge, Eveslogchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© Pavel M. Kartashov

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Formula:
(Na,K,Ca,Sr,Ba)
 
48
 [(Ti,Nb,Mn,Fe
2+
 
)
 
12
Si
 
48
O
 
144
(OH)
 
12
](F,OH,Cl)
 
14
System:MonoclinicColour:light-brown or ...
Hardness:5
Name:Named for the type locality, Mt. Eveslogchorr, Khibiny massif, Kola peninsula, Russia.
This page provides mineralogical data about Eveslogite.

Classification of Eveslogite

IMA status:Approved 2001
Nickel-Strunz 10th (pending) edition ID:9.DG.97

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains
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Type Occurrence of Eveslogite

Type Locality:Fersman Gorge, Eveslogchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
General Appearance of Type Material:Fibrous grains, up to 0.05 mm across and 5 cm long.
Place of Conservation of Type Material:Fersman Mineraloigcal Museum, Moscow, Russia
Geological Setting of type material:A monomineralic veinlet that cuts poikilitic nepheline syenite.
Associated Minerals at type locality:
ShcherbakoviteNephelineK FeldsparEudialyteBiotite
AstrophylliteApatite-(CaF)

Physical Properties of Eveslogite

Lustre:Vitreous, Silky
Colour:light-brown or yellow-brown
Streak:white
Hardness (Mohs):5
Hardness Data:Measured
Tenacity:Brittle
Cleavage:Perfect
{001}and {010} cleavages
Fracture:Splintery
Density (measured):2.85 g/cm3
Density (calculated):2.93 g/cm3

Crystallography of Eveslogite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P2/m {P1 1 2/m} {P2/m} {P1 2/m 1}
Cell Parameters:a = 14.069(3) Å, b = 24.937(5) Å, c = 44.31(2) Å
β = 95.02(4)°
Ratio:a:b:c = 0.564 : 1 : 1.777
Unit Cell Volume:V 15,486.03 ų (Calculated from Unit Cell)
Z:4
X-Ray Powder Diffraction:
d-spacingIntensity
12.33 (51)
6.199 (42)
3.127 (65)
3.110 (52)
2.990 (59)
2.940 (45)

Optical Data of Eveslogite

Type:Biaxial (-)
RI values: nα = 1.631(2) nβ = 1.641(2) nγ = 1.647(2)
2V:Calculated: 82°
Maximum Birefringence:δ = 0.016

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Pleochroism:Visible
Comments:Y and Z = pale yellow, X = colorless

Chemical Properties of Eveslogite

Formula:
(Na,K,Ca,Sr,Ba)
 
48
 [(Ti,Nb,Mn,Fe
2+
 
)
 
12
Si
 
48
O
 
144
(OH)
 
12
](F,OH,Cl)
 
14
All elements listed in formula:Ba, Ca, Cl, F, Fe, H, K, Mn, Na, Nb, O, Si, Sr, Ti

Relationship of Eveslogite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DG.05Bustamite
(Mn
2+
 
,Ca)[SiO
 
3
]
9.DG.05Ferrobustamite
Ca(Fe
2+
 
,Ca,Mn
2+
 
)[Si
 
2
O
 
6
]
9.DG.05Pectolite
NaCa
 
2
[HSi
 
3
O
 
9
]
9.DG.05Sérandite
Na(Mn
2+
 
,Ca)
 
2
[HSi
 
3
O
 
9
]
9.DG.05Wollastonite
Ca[SiO
 
3
]
9.DG.05Wollastonite-1A
CaSiO
 
3
9.DG.07Cascandite
Ca(Sc,Fe
3+
 
)[HSi
 
3
O
 
9
]
9.DG.08Plombièrite
Ca
 
5
Si
 
6
O
 
16
(OH)
 
2
·7H
 
2
O
9.DG.10Clinotobermorite
Ca
 
5
[Si
 
3
O
 
8
(OH)
 
2
]2.4H
 
2
O - Ca
 
5
[Si
 
6
O
 
17
]·5H
 
2
O
9.DG.10Riversideite
Ca
 
5
Si
 
6
O
 
16
(OH)
 
2
·2H
 
2
O
9.DG.10Tobermorite
Ca
 
5
Si
 
6
(O,OH)
 
18
·5H
 
2
O
9.DG.15Foshagite
Ca
 
4
[(OH)
 
2
|Si
 
3
O
 
9
]
9.DG.20Jennite
Ca
 
9
H
 
2
Si
 
6
O
 
18
(OH)
 
8
·6H
 
2
O
9.DG.25Paraumbite
K
 
3
Zr
 
2
H(Si
 
3
O
 
9
)
 
2
·nH
 
2
O
9.DG.25Umbite
K
 
2
(Zr,Ti)Si
 
3
O
 
9
·H
 
2
O
9.DG.30Sørensenite
Na
 
4
SnBe
 
2
Si
 
6
O
 
16
(OH)
 
4
9.DG.35Xonotlite
Ca
 
6
Si
 
6
O
 
17
(OH)
 
2
9.DG.40Hillebrandite
Ca
 
2
[(OH)
 
2
|SiO
 
3
]
9.DG.45Zorite
Na
 
2
Ti(Si,Al)
 
3
O
 
9
·nH
 
2
O
9.DG.45Chivruaiite
Ca
 
3
Ti
 
5
[(Si
 
6
O
 
17
)
 
2
|O(OH)
 
4
]·14H
 
2
O
9.DG.50Haineaultite
(Na,Ca)
 
5
Ca(Ti,Nb)
 
5
[(OH,F)
 
4
|Si
 
6
O
 
17
]
 
2
 · 5H
 
2
O
9.DG.55Epididymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
9.DG.60Eudidymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
9.DG.65Elpidite
Na
 
2
ZrSi
 
6
O
 
15
·3H
 
2
O
9.DG.70Fenaksite
(K,Na)
 
4
(Fe,Mn)
 
2
(Si
 
4
O
 
10
)
 
2
(OH,F)
9.DG.70Litidionite
CuNaKSi
 
4
O
 
10
9.DG.70Manaksite
KNaMnSi
 
4
O
 
10
9.DG.75Tinaksite
K
 
2
Na(Ca,Mn
2+
 
)
 
2
Ti[O|Si
 
7
O
 
18
(OH)]
9.DG.75Tokkoite
K
 
2
Ca
 
4
Si
 
7
O
 
17
(O,OH,F)
 
4
9.DG.75Senkevichite
CsKNaCa
 
2
Ti[O|Si
 
7
O
 
18
(OH)]
9.DG.80Canasite
K
 
2
Na
 
4
Ca
 
5
(Si
 
12
O
 
30
(OH,F)
 
4
9.DG.80Fluorcanasite
K
 
3
Na
 
3
Ca
 
5
Si
 
12
O
 
30
F
 
4
·H
 
2
O
9.DG.85Miserite
K(Ca,Ce)
 
4
Si
 
5
O
 
13
(OH)
 
3
9.DG.90Frankamenite
K
 
3
Na
 
3
Ca
 
5
(Si
 
12
O
 
30
)[F,(OH)]
 
4
·H
 
2
O
9.DG.92Charoite
(K,Na)
 
5
(Ca,Ba,Sr)
 
8
(Si
 
6
O
 
15
)
 
2
(Si
 
6
O
 
16
)(OH,F)·H
 
2
O
9.DG.95Yuksporite
(K,Ba)NaCa
 
2
(Si,Ti)
 
4
O
 
11
(F,OH)·H
 
2
O

Other Names for Eveslogite

Synonyms:
IMA2001-023
Other Languages:

Other Information

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 Eveslogite

Reference List:Men'shikov Yu.P., Khomyakov A.P., Ferraris G. et al. (2003) Eveslogite, (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Mn,Fe")12(OH)12Si48O144](F,OH,Cl)14, a new mineral from the Khibiny alkaline massif, Kola peninsula, Russia. - Zapiski VMO, 132(1), 59-67 (in Russian).

American Mineralogist: 89, 249 (2004) (abstract).

Internet Links for Eveslogite

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    Localities for Eveslogite

    (TL) indicates type locality. ? 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.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Eveslogchorr Mt
    		Men'shikov Yu.P., Khomyakov A.P., Ferraris G. et al. (2003) Eveslogite, (Ca,K,Na,Sr,Ba)48[(Ti,Nb,Mn,Fe")12(OH)12Si48O144](F,OH,Cl)14, a new mineral from the Khibiny alkaline massif, Kola peninsula, Russia, - Zapiski VMO, 132(1), 59-67 (in Russ.); Pekov, I. V. (1998): Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures Ltd., Moscow, 369 pp.
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 22nd Nov 2009 11:01:55