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Melanocerite-(Ce)

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Formula:
Ce5(SiO4,BO4)3(OH,O)
System:
Hexagonal
Colour:
Brown to black
Lustre:
Resinous, Greasy
Hardness:
5 - 6
Name:
Named by P.T. Cleve from the Greek for black (μέλας) and cerium, after the appearance and content of cerium. A preliminary description was given by Brøgger (1887), and more detailed in Brøgger (1890).
Probably a Ca-REE borosilicate within the apatite supergroup.
"To be potentially discredited [= tritomite-(Ce)]" according to Pasero et al. (2010).


Classification of Melanocerite-(Ce)

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1887
9.AJ.20

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4
54.2.5.3

54 : NESOSILICATES Borosilicates and Some Beryllosilicates
2 : Borosilicates and Some Beryllosilicates with B in [4] coordination
17.5.20

17 : Silicates Containing other Anions
5 : Borosilicates

Physical Properties of Melanocerite-(Ce)

Resinous, Greasy
Colour:
Brown to black
Comment:
Yellow translucent in thin splinters
Streak:
Pale brown
Hardness (Mohs):
5 - 6
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
None
Fracture:
Conchoidal
Density:
4.13 - 4.30 g/cm3 (Measured)    

Optical Data of Melanocerite-(Ce)

Type:
Uniaxial (-)
RI values:
nω = 1.730 nε = 1.720
Max Birefringence:
δ = 0.010
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of Melanocerite-(Ce)

IMA Formula:
Ce5(SiO4,BO4)3(OH,O)
Mindat.org Formula:
(Ce,Ca)5(SiO4,BO4)3(OH,0)

Often contains Th.
Elements listed in formula:
Analytical Data:
From Langesundsfjord Norway (Handbook)
SiO2 (13.07)
ZrO2 (0.46)
ThO2 (1.66)
B2O3 (3.19)
Al2O3 (0.83)
Y2O3 (9.17)
La2O3 (41.37)
Ce2O3 (3.52)
Fe2O3 (2.09)
Mn2O3 (1.22)
(Nb,Ta)2O5 (3.65)
MgO (0.14)
CaO (8.62)
Na2O(1.45)
F (5.78)
H2O (3.01)
CO2 (1.75)
P2O5 (1.29)
-O= F2 (2.43)
Total 99.84

Crystallography of Melanocerite-(Ce)

Crystal System:
Hexagonal
Morphology:
Thick tabular crystals with a rhombohedral habit, terminated by a pinacoid (at the TL)
Comment:
Generally metamict. Space group unknown. Heating to 600°C gives apatite-like powder pattern.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Occurrences of Melanocerite-(Ce)

Paragenetic Mode(s):

Type Occurrence of Melanocerite-(Ce)

General Appearance of Type Material:
Deepbrown to black platy crystals, from a few mm to a about 2 cm in size, embedded in feldspar
Place of Conservation of Type Material:
Natural History Museum, Stockholm, Sweden inventory nr 531071–72
Geological Setting of Type Material:
A syenite pegmatite dike

Relationship of Melanocerite-(Ce) to other Species

9.AJ.05GrandidieriteMgAl3O2(BO3)SiO4
9.AJ.05OmineliteFe2+Al3O2(BO3)SiO4
9.AJ.10DumortieriteAlAl6BSi3O18
9.AJ.10Holtite(Ta0.60.4)Al6BSi3O18
9.AJ.10MagnesiodumortieriteMgAl6BSi3O17(OH)
9.AJ.15GarrelsiteNaBa3B7Si2O16(OH)4
9.AJ.20BakeriteCa4(H5B5Si3O20)
9.AJ.20DatoliteCaB(SiO4)(OH)
9.AJ.20Gadolinite-(Ce)Fe2+Be2Ce2(SiO4)2O2
9.AJ.20Gadolinite-(Y)Fe2+Be2Y2(SiO4)2O2
9.AJ.20Hingganite-(Ce)BeCe(SiO4)(OH)
9.AJ.20Hingganite-(Y)(Y,REE,Ca)2(□,Fe2+)Be2[SiO4]2(OH)2
9.AJ.20Hingganite-(Yb)BeYb(SiO4)(OH)
9.AJ.20HomiliteCa2Fe2+B2(SiO4)2O2
9.AJ.20Minasgeraisite-(Y)CaBe2Y2(SiO4)2O2
9.AJ.20Calcybeborosilite-(Y)(Y,Ca)2(□,Fe2+)(B,Be)2[SiO4]2(OH,O)2
9.AJ.25Stillwellite-(Ce)CeBSiO5
9.AJ.30Cappelenite-(Y)BaY6B6Si3O24F2
9.AJ.35Okanoganite-(Y)(Y,REE,Ca,Na,Th)16(Fe3+,Ti)(Si,B,P)10(O,OH)38F10
9.AJ.35Vicanite-(Ce)(Ca,Ce,La,Th)15As5+(As3+,Na)0.5Fe3+0.7Si6B4(O,F)47
9.AJ.35Hundholmenite-(Y)(Y,REE,Ca,Na)15(Al,Fe3+)Cax(As3+)1-x(Si,As5+)Si6B3(O,F)48
9.AJ.35Proshchenkoite-(Y)(Y,REE,Ca,Na,Mn)15CaFe2+(P,Si)Si6B3O34F14
9.AJ.40JadariteLiNaB3SiO7(OH)
17.5.1ManandoniteLi2Al4(Si2AlB)O10(OH)8
17.5.2ReedmergneriteNaBSi3O8
17.5.3SearlesiteNaBSi2O5(OH)2
17.5.4OleniteNaAl3Al6(Si6O18)(BO3)3(O3)OH
17.5.5ElbaiteNa(Al1.5Li1.5)Al6(Si6O18)(BO3)3(OH)3OH
17.5.6KalborsiteK6Al4BSi6O20(OH)4Cl
17.5.7BoromuscoviteKAl2(Si3B)O10(OH)2
17.5.8PoudretteiteKNa2(B3Si12)O30
17.5.9LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
17.5.10DatoliteCaB(SiO4)(OH)
17.5.11DanburiteCaB2Si2O8
17.5.12HowliteCa2B5SiO9(OH)5
17.5.13BakeriteCa4(H5B5Si3O20)
17.5.14OyeliteCa10B2Si8O29 · 12H2O
17.5.15Kornerupine(Mg,Fe2+,Al,◻)10(Si,Al,B)5O21(OH,F)
17.5.16HarkeriteCa12Mg4Al(SiO4)4(BO3)3(CO3)5 · H2O
17.5.17SerendibiteCa4(Mg6Al6)O4[Si6B3Al3O36]
17.5.18Stillwellite-(Ce)CeBSiO5
17.5.19Tadzhikite-(Ce)
17.5.21Okanoganite-(Y)(Y,REE,Ca,Na,Th)16(Fe3+,Ti)(Si,B,P)10(O,OH)38F10
17.5.22Tritomite-(Ce)Ce5(SiO4,BO4)3(OH,O)
17.5.23Tritomite-(Y)Y5(SiO4,BO4)3(O,OH,F)
17.5.24Cappelenite-(Y)BaY6B6Si3O24F2
17.5.25DumortieriteAlAl6BSi3O18
17.5.26Holtite(Ta0.60.4)Al6BSi3O18
17.5.27DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3OH
17.5.28 FerridraviteNaFe33+(Mg2Fe43+)(Si6O18)(BO3)3(OH)3O
17.5.29Axinite-(Mg)Ca4Mg2Al4[B2Si8O30](OH)2
17.5.30UviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
17.5.31GarrelsiteNaBa3B7Si2O16(OH)4
17.5.32TienshaniteK(Na,K,◻)9Ca2Ba6Mn62+Ti6B12Si36O114(O,OH,F)11
17.5.33LeucospheniteNa4BaTi2B2Si10O30
17.5.34TaramelliteBa4(Fe3+,Ti)4O2[B2Si8O27]Clx; x = 0 to 1
17.5.35TitantaramelliteBa4(Ti,Fe3+,Mg)4(O,OH)2[B2Si8O27]Clx
17.5.36NagashimaliteBa4(V3+,Ti)4(O,OH)2[B2Si8O27]Cl
17.5.37Chromium-draviteNa(Mg3)Cr63+(Si6O18)(BO3)3(OH)3(OH)
17.5.38WawayandaiteCa6Be9Mn22+BSi6O23(OH,Cl)15
17.5.39WerdingiteMg2Al14Si4B4O37
17.5.40Axinite-(Mn)Ca4Mn22+Al4[B2Si8O30](OH)2
17.5.41Axinite
17.5.42TinzeniteCa2Mn42+Al4[B2Si8O30](OH)2
17.5.44SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3OH
17.5.45Fluor-buergeriteNaFe33+Al6(Si6O18)(BO3)3O3F
17.5.46FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3OH
17.5.47Axinite-(Fe)Ca4Fe22+Al4[B2Si8O30](OH)2
17.5.48HomiliteCa2Fe2+B2(SiO4)2O2
17.5.49GrandidieriteMgAl3O2(BO3)SiO4
17.5.50Hyalotekite(Ba,Pb,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28F
17.5.51Hellandite-(Y)(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2

Other Names for Melanocerite-(Ce)

Name in Other Languages:

Other Information

Other Information:
Weakly to strongly radioactive
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 Melanocerite-(Ce)

Reference List:
Brøgger, W.C. (1887):Forelöbig meddelelse om mineralerne på de sydnorske augit- og nefelinsyeniters grovkornige gange. Geologiska Föreningen i Stockholm Förhandlingar. 9: 247-274

Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie. 16. 663 pp + 28 plates (p. 468-477)

Doklady, Earth Science Sections (1969): 185: 107.

Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp.

Pasero, M., Kampf, A. R., Ferraris, C., Pekov, I. V., Rakovan, J. and White, T. J. (2010): Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy 22, 163-179.

Internet Links for Melanocerite-(Ce)

mindat.org URL:
https://www.mindat.org/min-2629.html
Please feel free to link to this page.

Localities for Melanocerite-(Ce)

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Canada
 
  • Ontario
    • Haliburton Co.
      • Cardiff Township
Royal Ontario Museum specimen M22568
GSC misc report 39
China
 
  • Liaoning Province (Manchuria; Dongbei Region)
    • Dandong Prefecture
      • Fengcheng Co.
Dahlkamp, F.J. (2009): Uranium Deposits of the World. Springer (Berlin, Heidelberg), pp. 31-156
Norway
 
  • Vestfold
    • Larvik
Andersen, T. & Neumann, H. (1985): Identity of "freyalite", an alleged rare earth-rich variety of thorite, and its pre-metamict composition. American Mineralogist. 70:1059-1064
Andersen, F.,Berge, S.A. & Burvald, I. (1996): Die Mineralien des Langesundsfjords und des umgebenden Larvikit-Gebietes, Oslo-Region, Norwegen. MineralienWelt 7(4):21-100
        • Barkevik area
Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie 16. 663 pp ( p.477)
          • Kjeøya
Brøgger, W.C. (1887):Forelöbig meddelelse om mineralerne på de sydnorske augit- og nefelinsyeniters grovkornige gange. Geologiska Föreningen i Stockholm Förhandlingar. 9: 247-274; Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie 16. 663 pp + 28 plates (p. 468-477)
        • Vesle Arøya
Brøgger, W.C. (1890): Die Mineralien der Syenitpegmatitgänge der südnorwegischen Augit-und Nephelinsyenite. Zeitschrift für Kristallographie und Mineralogie 16. p 462
Romania
 
  • Harghita Co.
Pál-Molnár (2000)
Mineral and/or Locality  
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