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Tristramite

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01804380015351221313036.jpg
Sir Tristam, King of Lyonesse
Formula:
(Ca,U,Fe)(PO4,SO4) · 2H2O
Colour:
Light yellow, greenish-yellow
Hardness:
3 - 4
Crystal System:
Hexagonal
Name:
Named after Tristram, a medieval figure of the Arthurian legend and a possible resident of the discovery area.
Rhabdophane Group


Hide all sections | Show all sections

Classification of TristramiteHide

Approved
Approval Year:
1982
8.CJ.45

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
40.4.7.6

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
4 : (AB)5(XO4)2·xH2O
22.3.22

22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates

Pronounciation of TristramiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of TristramiteHide

Colour:
Light yellow, greenish-yellow
Hardness:
3 - 4 on Mohs scale

Optical Data of TristramiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.644 nε = 1.664
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of TristramiteHide

Formula:
(Ca,U,Fe)(PO4,SO4) · 2H2O
IMA Formula:
(Ca,U4+,Fe3+)(PO4,SO4) · 2H2O

Crystallography of TristramiteHide

Crystal System:
Hexagonal
Cell Parameters:
a = 6.91 Å, c = 6.42 Å
Ratio:
a:c = 1 : 0.929
Unit Cell V:
265.47 ų (Calculated from Unit Cell)

Type Occurrence of TristramiteHide

Synonyms of TristramiteHide

Other Language Names for TristramiteHide

German:Tristramit
Simplified Chinese:水磷钙铀矿
Spanish:Tristramita

Relationship of Tristramite to other SpeciesHide

Other Members of this group:
Brockite(Ca,Th,Ce)PO4 · H2OHex. 6 2 2 : P62 2 2
Rhabdophane-(Ce)Ce(PO4) · H2OHex. 6 2 2 : P62 2 2
Rhabdophane-(La)La(PO4) · H2OHex. 6 2 2 : P62 2 2
Rhabdophane-(Nd)Nd(PO4) · H2OHex. 6 2 2 : P62 2 2
Rhabdophane-(Y)YPO4·H2OHex. 6 2 2 : P62 2 2
UM1993-07-PO:CaCeHLa(Ca,Ce,La,REE)PO4•nH2OHex. 6 2 2 : P62 2 2

Related Minerals - Nickel-Strunz GroupingHide

8.CJ.CaesiumpharmacosideriteCsFe4[(AsO4)3(OH)4]·4H2OIso. 4 3m : P4 3m
8.CJ.JeankempiteCa5(AsO4)2(HAsO4)2 · 7H2OTric. 1 : P1
8.CJ.05StercoriteNa(NH4)HPO4 · 4H2OTric.
8.CJ.10Mundrabillaite(NH4)2Ca(HPO4)2 · H2OMon. m : Pm
8.CJ.10Swaknoite(NH4)2Ca(HPO4)2 · H2OOrth.
8.CJ.15NabaphiteNaBaPO4 · 9H2OIso.
8.CJ.15NastrophiteNa(Sr,Ba)PO4 · 9H2OIso. 2 3 : P21 3
8.CJ.20HaidingeriteCaHAsO4 · H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
8.CJ.25VladimiriteCa4(AsO4)2(AsO3OH) · 4H2OMon. 2/m : P21/b
8.CJ.30FerrarisiteCa5(AsO4)2(HAsO4)2 · 9H2OTric. 1 : P1
8.CJ.35Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2OHex.
8.CJ.40PhaunouxiteCa3(AsO4)2 · 11H2OTric.
8.CJ.40RauenthaliteCa3(AsO4)2 · 10H2OTric. 1 : P1
8.CJ.45Brockite(Ca,Th,Ce)PO4 · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Grayite(Th,Pb,Ca)(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Ce)Ce(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(La)La(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Rhabdophane-(Nd)Nd(PO4) · H2OHex. 6 2 2 : P62 2 2
8.CJ.45Smirnovskite(Th,Ca)PO4 · nH2OHex. 6 2 2 : P62 2 2
8.CJ.50ArdealiteCa2(HPO4)(SO4) · 4H2OMon. m : Bb
8.CJ.50BrushiteCa(HPO4) · 2H2OMon. m : Bb
8.CJ.50Churchite-(Y)Y(PO4) · 2H2OMon. 2/m : B2/b
8.CJ.50PharmacoliteCa(HAsO4) · 2H2OMon. m
8.CJ.50Churchite-(Nd)Nd(PO4) · 2H2OMon.
8.CJ.55McneariteNaCa5(AsO4)(HAsO4)4 · 4H2OTric.
8.CJ.60DorfmaniteNa2HPO4 · 2H2OOrth.
8.CJ.65SincositeCa(VO)2(PO4)2 · 5H2OTet. 4/mmm (4/m 2/m 2/m) : P42/nnm
8.CJ.65BariosincositeBa(VO)2(PO4)2 · 4H2OTet.
8.CJ.70CatalanoiteNa2(HPO4) · 8H2OOrth. mmm (2/m 2/m 2/m) : Ibca
8.CJ.75GuériniteCa5(AsO4)2(HAsO4)2 · 9H2OMon. 2/m : P21/b
8.CJ.85NingyoiteCaU(PO4)2 · 1-2H2OOrth.

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

40.4.7.1Rhabdophane-(Ce)Ce(PO4) · H2OHex. 6 2 2 : P62 2 2
40.4.7.2Rhabdophane-(La)La(PO4) · H2OHex. 6 2 2 : P62 2 2
40.4.7.4Grayite(Th,Pb,Ca)(PO4) · H2OHex. 6 2 2 : P62 2 2
40.4.7.5Brockite(Ca,Th,Ce)PO4 · H2OHex. 6 2 2 : P62 2 2

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

22.3.1ParnauiteCu9(AsO4)2(SO4)(OH)10 · 7H2OOrth. mm2 : Pmn21
22.3.2ArdealiteCa2(HPO4)(SO4) · 4H2OMon. m : Bb
22.3.3Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2OHex.
22.3.4ClinotyroliteCa2Cu9(AsO4,SO4)4(OH,O)10 · 10H2OMon.
22.3.5PeisleyiteNa2Al9[(P,S)O4]8(OH)6•28H2OTric. 1 : P1
22.3.6ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2OTrig. 3 : R3
22.3.7WoodhouseiteCaAl3(PO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.8Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig.
22.3.9SvanbergiteSrAl3(PO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.10KemmlitziteSrAl3(AsO4)(SO4)(OH)6Trig.
22.3.11SanjuaniteAl2(PO4)(SO4)(OH) · 9H2OTric.
22.3.12KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2OTric. 1 : P1
22.3.13HotsoniteAl11(SO4)3(PO4)2(OH)21 · 16H2OTric.
22.3.14WeileriteBaAl3(AsO4)(SO4)(OH)6Hex.
22.3.15TsumebitePb2Cu(PO4)(SO4)(OH)Mon. 2/m : P21/m
22.3.16ArsentsumebitePb2Cu(AsO4)(SO4)(OH)Mon. 2/m : P21/m
22.3.17HinsdalitePbAl3(PO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.18HidalgoitePbAl3(AsO4)(SO4)(OH)6Trig.
22.3.19OrpheitePbAl3(PO4)(SO4)(OH)6Trig.
22.3.20CoconinoiteFe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2OMon.
22.3.21Sasaite(Al,Fe3+)14(PO4)11(SO4)(OH)7 · 83H2OOrth.
22.3.23CorkitePbFe3(PO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.24BeudantitePbFe3(AsO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.25DiadochiteFe3+2(PO4)(SO4)(OH) · 5H2OAmor.
22.3.26SarmientiteFe3+2(AsO4)(SO4)(OH) · 5H2OMon. 2/m : P21/b
22.3.27BukovskýiteFe3+2(AsO4)(SO4)(OH) · 9H2OTric. 1 : P1
22.3.28ZýkaiteFe3+4(AsO4)3(SO4)(OH) · 15H2OOrth. 2 2 2 : P2 2 2
22.3.29TooeleiteFe3+6(As3+O3)4(SO4)(OH)4 · 4H2OMon. 2/m : B2/m
22.3.30Pitticite(Fe, AsO4, H2O) (?)Amor.
22.3.31Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2OTet.

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 TristramiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Magazine (1983): 47: 393-396.
American Mineralogist (1984): 69: 813.

Internet Links for TristramiteHide

Localities for TristramiteHide

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
 
  • Inner Mongolia
    • Xilingol League (Xilinguole Prefecture)
      • Erenhot City (Erlianhaote Co.)
Guang Fan, Xiangkun Ge, and Apeng Yu (2013): Acta Mineralogica Sinica 33(3), 265-270
UK (TL)
 
  • England
    • Cornwall
      • Breage
        • Rinsey
Atkin, D., Basham, I.R., and Bowles, J.F.W. (1983): Mineralogical Magazine 47, 393-396
Atkin, D., Basham, I.R., and Bowles, J.F.W. (1983): Mineralogical Magazine 47, 393-396.
      • Carharrack
        • Carharrack
          • Wheal Damsel United Mines
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
      • Ludgvan
        • Trencrom
Minerals and their Localities, J.H Bernard, J. Hyrsl, 1st edition, 2004
      • Redruth
        • Wheal Buller and Beauchamp
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
      • St Ives
        • Carbis Bay
          • Providence Mines
Goley, P. and Williams R. (1995) Cornish Mineral Reference Manual. Endsleigh Publications
 
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