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Semenovite-(Ce)

Big Photo

Tasseq Slopes (Taseq Slopes), Tasseq area, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland
© 2007, J. Weissman

Show Semenovite-(Ce) Photos (8)
Formula:
Na
 
8
Ca
 
2
FeBe
 
6
Ce
 
2
Si
 
14
O
 
40
(OH)
 
4
F
 
4
System:OrthorhombicColour:reddish brown, ...
Hardness:3½ - 4
Name:
Named in honour of Professor Evgeny Ivanovich Semenov (1927-), Russian mineralogist, Institute of Mineralogy and Geochemistry of Rare Elements (IMGRE), Moscow
This page provides mineralogical data about Semenovite-(Ce).

Classification of Semenovite-(Ce)

IMA status:Approved 1971
Strunz 8th edition ID:8/G.03-10
Nickel-Strunz 10th (pending) edition ID:9.DN.10

9 : SILICATES (Germanates)
D : Inosilicates
N : Inosilicates with 6-periodic double chains
Dana 8th edition ID:72.5.2.4

72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
5 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with corrugated and complex layers
Hey's CIM Ref.:14.3.10

14 : Silicates not Containing Aluminum
3 : Silicates of Be
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Type Occurrence of Semenovite-(Ce)

Type Locality:Tasseq Slopes (Taseq Slopes), Tasseq area, Ilimaussaq complex, Narsaq, Kitaa (West Greenland) Province, Greenland

Physical Properties of Semenovite-(Ce)

Lustre:Vitreous, Waxy
Diaphaneity (Transparency):Transparent, Translucent
Colour:reddish brown, colourless, gray, brown
Streak:White
Hardness (Mohs):3½ - 4
Cleavage:None Observed

Crystallography of Semenovite-(Ce)

Crystal System:Orthorhombic

Optical Data of Semenovite-(Ce)

Type:Biaxial (-)
RI values: nα = 1.595 nβ = 1.614 nγ = 1.614
Maximum Birefringence:δ = 0.019

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v or r < v

Chemical Properties of Semenovite-(Ce)

Formula:
Na
 
8
Ca
 
2
FeBe
 
6
Ce
 
2
Si
 
14
O
 
40
(OH)
 
4
F
 
4
Essential elements:Be, Ca, Ce, F, Fe, H, Na, O, Si
All elements listed in formula:Be, Ca, Ce, F, Fe, H, Na, O, Si

Relationship of Semenovite-(Ce) to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DN.05Emeleusite
Li
 
2
Na
 
4
Fe
 
2
Si
 
12
O
 
30
9.DN.05Tuhualite
(Na,K)
 
2
Fe
 
2
Fe
 
2
Si
 
12
O
 
30
·H
 
2
O
9.DN.05Zektzerite
LiNa(Zr,Ti,Hf)Si
 
6
O
 
15
9.DN.15Ashcroftine-(Y)
K
 
5
Na
 
5
(Y,Ca)
 
12
Si
 
28
O
 
70
(OH)
 
2
(CO
 
3
)
 
8
·8H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.3.1Phenakite
Be
 
2
[SiO
 
4
]
14.3.2Bertrandite
Be
 
4
[(OH)
 
2
|Si
 
2
O
 
7
]
14.3.3Beryllite
Be
 
3
[(OH)
 
2
|SiO
 
4
] · H
 
2
O
14.3.4Liberite
Li
 
2
Be[SiO
 
4
]
14.3.5Chkalovite
Na
 
2
BeSi
 
2
O
 
6
14.3.6Eudidymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
14.3.7Epididymite
Na
 
2
Be
 
2
Si
 
6
O
 
15
·H
 
2
O
14.3.8Gugiaite
Ca
 
2
Be[Si
 
2
O
 
7
]
14.3.9Jeffreyite
(Ca,Na)
 
2
(Be,Al)[Si
 
2
O
 
6
(O,OH)]
14.3.11Barylite
BaBe
 
2
[Si
 
2
O
 
7
]
14.3.12Hingganite-(Ce)
(Ce,REE)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
14.3.13Hingganite-(Yb)
(Yb,Y,REE)
 
2
□Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
14.3.14Hingganite-(Y)
(Y,REE,Ca)
 
2
(□,Fe
2+
 
)Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2
14.3.15Minasgeraisite-(Y)
Y
 
2
CaBe
 
2
[O|SiO
 
4
]
 
2
14.3.16Sørensenite
Na
 
4
SnBe
 
2
Si
 
6
O
 
16
(OH)
 
4
14.3.17Trimerite
CaMn
2+
2
Be
 
3
[SiO
 
4
]
 
3
14.3.18Chiavennite
CaMnBe
 
2
Si
 
5
O
 
13
(OH)
 
2
·2H
 
2
O
14.3.19Tvedalite
(Ca,Mn)
 
4
Be
 
3
Si
 
6
O
 
17
(OH)
 
4
·3H
 
2
O
14.3.20Harstigite
Ca
 
6
(Mn,Mg)Be
 
4
Si
 
6
(O,OH)
 
24
14.3.21Sverigeite
NaMnMgSnBe
 
2
Si
 
3
O
 
12
(OH)
14.3.22Joesmithite
PbCa
 
2
Mg
 
3
Fe
3+
2
[Si
 
6
Be
 
2
O
 
22
](OH)
 
2
14.3.23Gadolinite-(Y)
Y
 
2
Fe
2+
 
Be
 
2
[O|SiO
 
4
]
 
2
14.3.24Gadolinite-(Ce)
(Ce,La,Nd,Y)
 
2
Fe
2+
 
Be
 
2
[O|SiO
 
4
]
 
2
14.3.25Calciogadolinite-(Y)
(YCa)
 
2
Fe
3+
 
Be
 
2
[SiO
 
4
]
 
2
(OH)
 
2

Other Names for Semenovite-(Ce)

Synonyms:
IMA1971-036Semenovite
Other Languages:
German:Semenovit
Semenovit-(Ce)
Russian:Семеновит-(Ce)
Spanish:Semenovita

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 Semenovite-(Ce)

Reference List:Petersen, O.V., Rønsbo, J.G. (1972)Lithos, 5, 163-173.

American Mineralogist 58 (1973), 1114.

Mazzi, F., Ungaretti, L., Dal Negro, A., Peterson, O.V., Rønsbo, J.G. (1979)American Mineralogist, 64, 202-210.

Internet Links for Semenovite-(Ce)

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    Localities for Semenovite-(Ce)

    Hide Locality List
    The 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.
    (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.
    Greenland
     
    • Kitaa (West Greenland) Province
      • Narsaq
        • Ilimaussaq complex
          • Tasseq area
    		Petersen O V, Rönsbo J G (1972) Semenovite - a new mineral from the Ilimaussaq alkaline intrusion, south Greenland, Lithos 5, 163-173
    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: 4th Nov 2009 08:53:04