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Mathiasite

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Professor Frances Celia Mathias
Formula:
(K, Ba, Sr)(Zr, Fe)(Mg,Fe)2 (Ti,Cr,Fe)18O38
Colour:
Black
Lustre:
Metallic
Hardness:
Crystal System:
Trigonal
Name:
Named by S.E. Haggerty, J.R. Smyth, A.J. Erlank, R.S. Rickard, and R.V. Danchin in 1983 in honor of Frances Celia Morna Mathias (20 May 1913, UK - ), petrologist and geochemist. She was a professor in the Department of Geology, University of Cape Town, South Africa. The name is in recognition of her work on alkaline rocks and mantle-derived eclogites and peridotites.
A member of the Crichtonite Group.


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Classification of MathiasiteHide

Approved
First Published:
1983
4.CC.40

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations
8.5.1.7

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
5 : AB21O38
7.14.6

7 : Oxides and Hydroxides
14 : Oxides of Cr

Physical Properties of MathiasiteHide

Metallic
Transparency:
Opaque
Colour:
Black
Hardness:
7½ on Mohs scale
Fracture:
Conchoidal

Optical Data of MathiasiteHide

Type:
Anisotropic
Anisotropism:
Moderate
Reflectivity:
400nmR=20.1–20.8%
420nmR=19.5–20.2%
440nmR=19.0–19.7%
460nmR=18.5–19.2%
480nmR=18.1–18.6%
500nmR=17.7–18.4%
520nmR=17.4–18.2%
540nmR=17.2–17.9%
560nmR=16.9–17.7%
580nmR=16.8–17.6%
600nmR=16.6–17.4%
620nmR=16.5–17.4%
640nmR=16.5–17.3%
600nmR=16.5–17.3%
680nmR=16.4–17.3%
700nmR=16.4–17.3%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 20.1–20.8%.
Colour in reflected light:
Dark-tan
Internal Reflections:
None
Pleochroism:
Weak

Chemical Properties of MathiasiteHide

Formula:
(K, Ba, Sr)(Zr, Fe)(Mg,Fe)2 (Ti,Cr,Fe)18O38
IMA Formula:
(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12

Crystallography of MathiasiteHide

Crystal System:
Trigonal
Cell Parameters:
a = 10.35 Å, c = 20.58 Å
Ratio:
a:c = 1 : 1.988
Unit Cell V:
1,909.22 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.39 (60)
2.99 (80)
2.88 (80)
2.25 (90)
2.14 (100)
1.79 (70)
1.44 (100)

Type Occurrence of MathiasiteHide

General Appearance of Type Material:
Massive, homogeneous and polycrystalline aggregates to 0.5-5 cm. Many appear to be single crystals, sub-spherical in shape with dimpled surfaces and an outer matte luster.
Place of Conservation of Type Material:
National Museum, Cape Town, South Africa.
The Natural History Museum, London, England.
National Museum of Natural History, Washington, D.C., USA.
Geological Setting of Type Material:
Kimberlite, peridotite

Synonyms of MathiasiteHide

Other Language Names for MathiasiteHide

German:Mathiasit
Simplified Chinese:蒙山矿
Spanish:Mathiasita

Relationship of Mathiasite to other SpeciesHide

Other Members of this group:
AlmeidaitePbZn2(Mn,Y)(Ti,Fe3+)18O37(OH,O)Trig. 3 : R3
Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 : R3
CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig. 3 : R3
Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig.
Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.
Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig. 3 : R3
Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig. 3
LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig. 3 : R3
Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.
Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig.
Mapiquiroite(Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38Trig. 3 : R3
Mianningite(◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38Trig. 3 : R3
PaseroitePbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38 Trig. 3 : R3
SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig.
UM1987-03-O:FePbTiU~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38Trig. 3 : R3
Unnamed (HBU UK-4)NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38Trig. 3 : R3

Related Minerals - Nickel-Strunz GroupingHide

4.CC.AllendeiteSc4Zr3O12Trig. 3 : R3
4.CC.Yttriaite-(Y)Y2O3Iso.
4.CC.05ChrombismiteBi16CrO27Tet.
4.CC.10FreudenbergiteNa2(Ti,Fe)8O16Mon.
4.CC.15GrossiteCaAl4O7Mon. 2/m : B2/b
4.CC.20ChlormayeniteCa12Al14O32[◻4Cl2]Iso. 4 3m : I4 3d
4.CC.25YafsoaniteCa3Zn3(TeO6)2Iso. m3 (2/m 3)
4.CC.30LatrappiteCa2NbFe3+O6Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30LueshiteNaNbO3Orth. mmm (2/m 2/m 2/m)
4.CC.30NatroniobiteNaNbO3Mon.
4.CC.30PerovskiteCaTiO3Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30BarioperovskiteBaTiO3Orth. mm2 : Amm2
4.CC.30LakargiiteCa(Zr,Sn,Ti)O3Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30MegawiteCaSnO3Orth. mmm (2/m 2/m 2/m) : Pban
4.CC.35Loparite-(Ce)(Na,REE)Ti2O6
4.CC.35MacedonitePbTiO3Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
4.CC.35TausoniteSrTiO3Iso. 4 3m
4.CC.35Isolueshite(Na,La)NbO3Iso. m3m (4/m 3 2/m) : Pm3m
4.CC.40CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
4.CC.40Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig. 3 : R3
4.CC.40Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig.
4.CC.40Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.
4.CC.40LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig. 3 : R3
4.CC.40Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.
4.CC.40Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig.
4.CC.40SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig.
4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig. 3 : R3
4.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 : R3
4.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig. 3
4.CC.45DiaoyudaoiteNaAl11O17Hex.
4.CC.45HawthorneiteBaMgTi3Cr4Fe2+2Fe3+2O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45Hibonite(Ca,Ce)(Al,Ti,Mg)12O19Hex.
4.CC.45LindqvistitePb2Mn2+Fe16O27Hex.
4.CC.45Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19Hex.
4.CC.45PlumboferritePb2(Fe3+,Mn2+,Mg)11O19Trig. 3 2
4.CC.45YimengiteK(Cr,Ti,Fe,Mg)12O19Hex.
4.CC.45HaggertyiteBaFe2+4Fe3+2Ti5MgO19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45NežilovitePbZn2Mn4+2Fe3+8O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45BatiferriteBaTi2Fe3+8Fe2+2O19Hex.
4.CC.45Hibonite-(Fe)(Fe,Mg)Al12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45BarioferriteBaFe3+12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.50Jeppeite(K,Ba)2(Ti,Fe)6O13Mon.
4.CC.55ZenzénitePb3Fe4Mn3O15Hex.
4.CC.60Mengxianminite (of Huang et al.)(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29

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

8.5.1.1LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig. 3 : R3
8.5.1.2Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig.
8.5.1.3CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
8.5.1.4SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig.
8.5.1.5Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig.
8.5.1.6Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig. 3 : R3
8.5.1.8Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.14.1EskolaiteCr2O3Trig.
7.14.2BracewelliteCrO(OH)Orth. mmm (2/m 2/m 2/m)
7.14.3GrimaldiiteCrO(OH)Trig.
7.14.4GuyanaiteCrO(OH)Orth.
7.14.5YimengiteK(Cr,Ti,Fe,Mg)12O19Hex.
7.14.7McconnelliteCuCrO2Trig.
7.14.8RedledgeiteBa(Ti4+6Cr3+2)O16Tet.
7.14.9HawthorneiteBaMgTi3Cr4Fe2+2Fe3+2O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
7.14.10ZincochromiteZnCr2O4Iso.
7.14.11Wattersite(Hg+2)2Hg2+(CrO4)O2Mon. 2/m : B2/b
7.14.12ChromiteFe2+Cr3+2O4Iso. m3m (4/m 3 2/m) : Fd3m
7.14.13MagnesiochromiteMgCr2O4Iso. m3m (4/m 3 2/m) : Fd3m

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 MathiasiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Haggerty, S.E., Smyth, J.R., Erlank, A.J., Rickard, R.S., Danchin, R.V. (1983) Lindsleyite (Ba) and mathiasite (K): two new chromium-titanites in the crichtonite series from the upper mantle. American Mineralogist: 68: 494-505.
Gatehouse, B.M., Grey, I.E., Smyth, J.R. (1983) Structure refinement of mathiasite, (K0.62Na0.14Ba0.14Sr0.10)Σ1.0[Ti12.90Cr3.10Mg1.53Fe2.15Zr0.67Ca0.29V0.36]Σ21.0O38. Acta Crystallographica: C39: 421-422.
Foley, S., Höfer, H., Brey, G. (1994) High-pressure synthesis of priderite and members of the lindsleyite-mathiasite and hawthorneite-yimengite series. Contributions to Mineralogy and Petrology: 117(2): 164-174.
Wülser, P.-A., Brugger, J., Meisser, N. (2004) The crichtonite group of minerals: a review of the classification. Bulletin de liaison de la Société Francaise de Minéralogie et Cristallographie: 16: 76-77.

Internet Links for MathiasiteHide

Localities for MathiasiteHide

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
 
  • Shandong Province
    • Linyi Prefecture
      • Fei Co.
Weiguo Zhong, Dengshi Zhou, Jitai Liu, Xiaoping Cheng, and Lihua Xie (2003): Shandong Geology 19(1), 43-49
AM 73 (1988), 441; Qi Lu and Zhizhong Peng (1987): Crystal structure of Mathiasite. Acta Petrologica et Mineralogica 6(3), 221-229 (in Chinese with English abstract).
        • Mengyin Co.
Jianhong Zhang, Guojie Yang, and Zhaohui Li (1986): Kuangwu Xuebao 6, 344-349.
Russia
 
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
Sobolev, N., Kaminsky, F., Griffin, W., Yefimova, E., Win, T., Ryan, C., and Botkunov, A. (1997) Mineral inclusions in diamonds from the Sputnik kimberlite pipe, Yakutia. Lithos: 39: 135-157.
South Africa (TL)
 
  • Free State Province
    • Xhariep District
      • Jagersfontein
S.E. Haggerty, J.R. Smyth, A.J. Erlank, R.S. Rickard, R.V. Danchin: Amer. Mineral. 68:494-505 (1983)
  • Northern Cape Province
    • Francis Baard District
      • Kimberley
S.E. Haggerty, J.R. Smyth, A.J. Erlank, R.S. Rickard, R.V. Danchin: Amer. Mineral. 68:494-505 (1983)
        • KEM JV Mine (Kimberley Ekapa Mining Joint Venture mine; Kimberley Underground mine)
S.E. Haggerty, J.R. Smyth, A.J. Erlank, R.S. Rickard, R.V. Danchin: Amer. Mineral. 68:494-505 (1983)
    • John Taolo Gaetsewe District
      • Mackenzie's Post District
S.E. Haggerty, J.R. Smyth, A.J. Erlank, R.S. Rickard, R.V. Danchin: Amer. Mineral. 68:494-505 (1983)
Mineral and/or Locality  
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