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Evgeny Ivanovich Semenov
reddish brown, colourless, gray, brown
Vitreous, Waxy
3½ - 4
Crystal System:
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

Approval Year:

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

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 : Silicates not Containing Aluminum
3 : Silicates of Be

Physical Properties of Semenovite-(Ce)Hide

Vitreous, Waxy
Transparent, Translucent
reddish brown, colourless, gray, brown
3½ - 4 on Mohs scale
None Observed

Optical Data of Semenovite-(Ce)Hide

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:
r > v or r < v

Chemical Properties of Semenovite-(Ce)Hide

IMA Formula:

Crystallography of Semenovite-(Ce)Hide

Crystal System:
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
a:b:c = 1.003 : 1 : 0.719
Unit Cell V:
1,909.02 ų (Calculated from Unit Cell)
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

Related Minerals - Nickel-Strunz GroupingHide

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,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17,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
14.3.12Hingganite-(Ce)(Ce,REE)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
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.
14.3.21SverigeiteNaMnMgSnBe2(SiO4)3(OH)Orth. mmm (2/m 2/m 2/m) : Imma
14.3.23Gadolinite-(Y)Y2Fe2+Be2Si2O10Mon. 2/m : P21/b
14.3.24Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10Mon. 2/m

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.
  • 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
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