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Semenovite-(Ce)

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Evgeny Ivanovich Semenov
Formula:
Na8Ca2FeBe6Ce2Si14O40(OH)4F4
Colour:
reddish brown, colourless, gray, brown
Lustre:
Vitreous, Waxy
Hardness:
3½ - 4
Crystal System:
Orthorhombic
Name:
Named in 1972 by Ole Valdemar Petersen and Jørn Grummesgaard Ronsbo in honor of Professor Evgeny Ivanovich Semenov [1927-March 2017], Russian mineralogist, Institute of Mineralogy and Geochemistry of Rare Elements (IMGRE), Moscow.
This page provides mineralogical data about Semenovite-(Ce).


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Classification of Semenovite-(Ce)Hide

Approved
Approval Year:
1971
9.DN.10

9 : SILICATES (Germanates)
D : Inosilicates
N : Inosilicates with 6-periodic double chains
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
14.3.10

14 : Silicates not Containing Aluminum
3 : Silicates of Be

Physical Properties of Semenovite-(Ce)Hide

Vitreous, Waxy
Transparency:
Transparent, Translucent
Colour:
reddish brown, colourless, gray, brown
Streak:
White
Hardness:
3½ - 4 on Mohs scale
Cleavage:
None Observed

Optical Data of Semenovite-(Ce)Hide

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

Formula:
Na8Ca2FeBe6Ce2Si14O40(OH)4F4
IMA Formula:
(Na,Ca)9Fe2+Ce2(Si,Be)20(O,OH,F)48

Crystallography of Semenovite-(Ce)Hide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 13.879(5) Å, b = 13.835(5) Å, c = 9.942(6) Å
Ratio:
a:b:c = 1.003 : 1 : 0.719
Unit Cell V:
1,909.02 ų (Calculated from Unit Cell)
Comment:
Space group Pmnn (non-standard setting). Pseudotetragonal.

Type Occurrence of Semenovite-(Ce)Hide

Synonyms of Semenovite-(Ce)Hide

Other Language Names for Semenovite-(Ce)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Epididymite1 photo of Semenovite-(Ce) associated with Epididymite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.DN.05EmeleusiteLi2Na4Fe2Si12O30Orth.
9.DN.05TuhualiteNaFe2+Fe3+Si6O15Orth.
9.DN.05ZektzeriteLiNaZrSi6O15Orth.
9.DN.15Ashcroftine-(Y)K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8 · 8H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm

Related Minerals - Dana Grouping (8th Ed.)Hide

72.5.2.1LeucospheniteBaNa4Ti2B2Si10O30Mon.
72.5.2.2Nordite-(Ce)(Ce,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17
72.5.2.3Nordite-(La)(La,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.3.1PhenakiteBe2SiO4Trig. 3 : R3
14.3.2BertranditeBe4(Si2O7)(OH)2Orth. mm2 : Cmc21
14.3.3BerylliteBe3(SiO4)(OH)2 · H2OOrth.
14.3.4LiberiteLi2BeSiO4Mon. m : Pm
14.3.5ChkaloviteNa2BeSi2O6Orth. mm2 : Fdd2
14.3.6EudidymiteNa2Be2Si6O15 · H2OMon. 2/m : B2/b
14.3.7EpididymiteNa2Be2Si6O15 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
14.3.8GugiaiteCa2Be(Si2O7)Tet.
14.3.9Jeffreyite(Ca,Na)2(Be,Al)(Si2O7,HSi2O7)Orth.
14.3.11BaryliteBe2Ba(Si2O7)Orth.
14.3.12Hingganite-(Ce)(Ce,REE)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
14.3.13Hingganite-(Yb)(Yb,Y,REE)2□Be2[SiO4]2(OH)2
14.3.14Hingganite-(Y)(Y,REE,Ca)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
14.3.15Minasgeraisite-(Y)CaBe2Y2Si2O10Mon. 2/m : P21/b
14.3.16SørenseniteNa4SnBe2Si6O16(OH)4Mon. 2/m : B2/b
14.3.17TrimeriteCaMn2+2Be3(SiO4)3Mon. 2/m : P21/m
14.3.18ChiavenniteCaMnBe2Si5O13(OH)2 · 2H2OMon. 2/m : P21/b
14.3.19Tvedalite(Ca,Mn)4Be3Si6O17(OH)4 · 3H2OOrth.
14.3.20HarstigiteCa6(Mn,Mg)Be4Si6(O,OH)24Orth.
14.3.21SverigeiteNaMnMgSnBe2(SiO4)3(OH)Orth. mmm (2/m 2/m 2/m) : Imma
14.3.22Joesmithite{Pb}{Ca2}{Mg3Fe3+2}(Be2Si6O22)(OH)2Mon.
14.3.23Gadolinite-(Y)Y2Fe2+Be2Si2O10Mon. 2/m : P21/b
14.3.24Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10Mon. 2/m
14.3.25Calciogadolinite-(Y)(YCa)2Fe3+Be2[SiO4]2O2

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 Semenovite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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)Hide

Localities for Semenovite-(Ce)Hide

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.
Greenland
 
  • Kujalleq
    • Narsaq
Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
        • Taseq 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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