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Yttrocrasite-(Y)

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Formula:
(Y,Th,Ca,U)(Ti,Fe)2(O,OH)6
Colour:
Black
Lustre:
Resinous
Hardness:
5½ - 6
Specific Gravity:
4.8
Crystal System:
Amorphous
Member of:
Name:
Named after its chemical composition containing yttrium and from Greek "krasis", "mixture", alluding to the many other elements present.
Euxenite Group.

A poorly characterised, often metamict mineral which may be identical with euxenite-(Y).
Compare also polycrase-(Y).


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Classification of Yttrocrasite-(Y)Hide

Questionable
First Published:
1906
4.DG.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
G : With large (+- medium-sized) cations; chains of edge-sharing octahedra
8.3.8.4

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
7.9.12

7 : Oxides and Hydroxides
9 : Oxides of Ti

Physical Properties of Yttrocrasite-(Y)Hide

Resinous
Colour:
Black
Comment:
Under microscop fragments shows through their edges a amber to light yellow color
Hardness:
5½ - 6 on Mohs scale
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
4.8 g/cm3 (Measured)    

Optical Data of Yttrocrasite-(Y)Hide

Type:
Isotropic

Chemical Properties of Yttrocrasite-(Y)Hide

Formula:
(Y,Th,Ca,U)(Ti,Fe)2(O,OH)6
Common Impurities:
W

Crystallography of Yttrocrasite-(Y)Hide

Crystal System:
Amorphous
Comment:
Metamict (may have been orthorhombic before metamictisation). Crook (1977) gives, for a non-metamict sample, the following unit-cell parameters and space group: Pbcn, a 12.862(7), b 4.810(2), c 4.571(3) Å.

First Recorded Occurrence of Yttrocrasite-(Y)Hide

General Appearance of First Recorded Material:
A crystal with a dull brown alteration coating and a black, fresh interior.

Synonyms of Yttrocrasite-(Y)Hide

Other Language Names for Yttrocrasite-(Y)Hide

Simplified Chinese:钛钇钍矿
Spanish:Yttrocrasita

Relationship of Yttrocrasite-(Y) to other SpeciesHide

Member of:
Other Members of this group:
Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6Orth. mmm (2/m 2/m 2/m)
Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6Orth. mmm (2/m 2/m 2/m) : Pbcn
Kobeite-(Y)(REE,Fe,U)3 Zr(Ti,Nb)3 O12
Loranskite-(Y)(Y,Ce,Ca)ZrTaO6 (?)
Polycrase-(Y)Y(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
Uranopolycrase(U4+,Y)(Ti,Nb)2O6Orth. mmm (2/m 2/m 2/m) : Pbcn

Common AssociatesHide

Associated Minerals Based on Photo Data:
Chloritoid6 photos of Yttrocrasite-(Y) associated with Chloritoid on mindat.org.
Thalénite-(Y)5 photos of Yttrocrasite-(Y) associated with Thalénite-(Y) on mindat.org.
Tengerite-(Y)5 photos of Yttrocrasite-(Y) associated with Tengerite-(Y) on mindat.org.
Pyrophyllite4 photos of Yttrocrasite-(Y) associated with Pyrophyllite on mindat.org.
Allanite-(Y)4 photos of Yttrocrasite-(Y) associated with Allanite-(Y) on mindat.org.
Piemontite2 photos of Yttrocrasite-(Y) associated with Piemontite on mindat.org.
Keiviite-(Y)2 photos of Yttrocrasite-(Y) associated with Keiviite-(Y) on mindat.org.
Hematite1 photo of Yttrocrasite-(Y) associated with Hematite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.DG.05Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6Orth. mmm (2/m 2/m 2/m)
4.DG.05Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6Orth. mmm (2/m 2/m 2/m) : Pbcn
4.DG.05Kobeite-(Y)(REE,Fe,U)3 Zr(Ti,Nb)3 O12
4.DG.05Loranskite-(Y)(Y,Ce,Ca)ZrTaO6 (?)
4.DG.05Polycrase-(Y)Y(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
4.DG.05Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
4.DG.05Uranopolycrase(U4+,Y)(Ti,Nb)2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
4.DG.10Fergusonite-(Y)-βYNbO4Mon. 2/m
4.DG.10Fergusonite-(Nd)-β(Nd,Ce)NbO4
4.DG.10Fergusonite-(Ce)-β(Ce,La,Nd)NbO4
4.DG.10Yttrotantalite-(Y)(Y,U4+,Fe2+)(Ta,Nb)(O,OH)4Orth.
4.DG.10Beta-Fergusonite-(Nd)(Nd,Ce)NbO4
4.DG.15FoorditeSn2+(Nb,Ta)2O6Mon. 2/m : B2/b
4.DG.15Thoreaulite(Sn2+,Pb)(Ta,Nb)2O6Mon.
4.DG.20RaspitePb(WO4)Mon. 2/m : P21/b

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

8.3.8.1Polycrase-(Y)Y(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
8.3.8.2Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6Orth. mmm (2/m 2/m 2/m)
8.3.8.3Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
8.3.8.5Uranopolycrase(U4+,Y)(Ti,Nb)2O6Orth. mmm (2/m 2/m 2/m) : Pbcn

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.9.1HongquiiteTiO
7.9.2RutileTiO2Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
7.9.3AnataseTiO2Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
7.9.4BrookiteTiO2Orth. mmm (2/m 2/m 2/m)
7.9.5GeikieliteMgTiO3Trig. 3 : R3
7.9.6PerovskiteCaTiO3Orth. mmm (2/m 2/m 2/m) : Pnma
7.9.7KassiteCaTi2O4(OH)2Orth.
7.9.8TausoniteSrTiO3Iso. 4 3m
7.9.9CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
7.9.10Lucasite-(Ce)CeTi2(O,OH)6Mon.
7.9.11Hibonite(Ca,Ce)(Al,Ti,Mg)12O19Hex.
7.9.13PyrophaniteMn2+TiO3Trig. 3 : R3
7.9.14IwakiiteMn2+Fe3+2O4Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
7.9.15IlmeniteFe2+TiO3Trig. 3 : R3
7.9.16PseudobrookiteFe2TiO5Orth. mmm (2/m 2/m 2/m)
7.9.17UlvöspinelFe2TiO4Iso.
7.9.18PseudorutileFe2Ti3O9Hex.
7.9.19FreudenbergiteNa2(Ti,Fe)8O16Mon.
7.9.20KennedyiteFe2TiO5
7.9.21Armalcolite(Mg,Fe2+)Ti2O5Orth. mmm (2/m 2/m 2/m)
7.9.22Högbomite(Mg,Fe)2(Al,Ti)5O10Hex.
7.9.23Qandilite(Mg,Fe3+)2(Ti,Fe3+,Al)O4
7.9.24CafetiteCaTi2O5 · H2OMon. 2/m : P21/b
7.9.25Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig.
7.9.26Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.
7.9.27PrideriteK(Ti4+7Fe3+)O16Tet.
7.9.28Jeppeite(K,Ba)2(Ti,Fe)6O13Mon.
7.9.29AnkangiteBa(Ti,V3+,Cr)8O16Tet. 4/m : I4/m
7.9.30Ecandrewsite(Zn,Fe2+,Mn2+)TiO3Trig. 3 : R3
7.9.31LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig. 3 : R3

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 Yttrocrasite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hidden, W.E. and Warren, C.H. (1906): Yttrocrasite, A New Yttrium-Thorium-Uranium Titanate. American Journal of Science, 4th. series: 22: 515-519.
Zambonini (1908), Zs. Kr.: 45: 76.
Palache, Charles, Harry Berman & Clifford Frondel (1944) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 793.
Crook, W. W., III (1977): New data on yttrocrasite from the Clear Creek pegmatite, Burnet County, Texas. Am. Mineral. 62, 1009-1011.
Peacor, D.R., Simmons, W.B., Jr., Essene, E.J., Heinrich, E.W. (1982): New data on and discreditation of "texasite," "albrittonite," "cuproartinite," "cuprohydromagnesite," and "yttromicrolite," with corrected data on nickelbischofite, rowlandite, and yttrocrasite. American Mineralogist 67, 156-169.
Tomašić, N., Gajović, A., Bermanec, V., Rajić, M. (2004): Recrystallization of metamict Nb-Ta-Ti-REE complex oxides: A coupled X-ray-diffraction and Raman spectroscopy study of aeschynite-(Y) and polycrase-(Y). Canadian Mineralogist 42, 1847-1857.

Internet Links for Yttrocrasite-(Y)Hide

Localities for Yttrocrasite-(Y)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.
China
 
  • Jiangxi Province
    • Ganzhou Prefecture
      • Longnan Co.
Yunhuai Lin and Shiyang Chen (1985): Geology and Prospecting 21(3), 23-31
Russia
 
  • Northern Region
    • Komi Republic
      • Prepolar Ural
        • Kozhim River Basin
          • Maldynyrd range (Maldy-nyrd range)
            • Grubependity Lake
Pavel M. Kartashov data
Sweden
 
  • Värmland
    • Filipstad
      • Persberg district
P.M. Kartashov data
USA
 
  • California
    • Riverside Co.
      • Lakeview Mts
        • Nuevo
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 390; Mineralogical Record (1976): 7: 182.
  • Texas
    • Burnet Co.
Crook, Wilson W. III (1976) Yttrocrasite from central Texas. Mineralogical Record 7: 182-183.; Crook, Wilson W. III (1977) Texasite, a new mineral: the first example of a differentiated rare-earth species. American Mineralogist: 62: 1006-1008.
Hidden and Warren (1906), American Journal of Science, 4th. series: 22: 515-519.
    • Llano Co.
      • Bluffton
[MinRec 7:182-183]
Mineral and/or Locality  
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