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Katoptrite

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Formula:
(Mn2+,Mg)13(Al,Fe3+)4Sb5+2(SiO4)2O20
Colour:
black; fire-red (thin sections); red in transmitted light
Lustre:
Metallic
Hardness:
Specific Gravity:
4.56
Crystal System:
Monoclinic
Name:
From the Greek κάτοπτρου for "mirror" in allusion to the glassy reflections off its cleavages.
This page provides mineralogical data about Katoptrite.


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Classification of KatoptriteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.AE.40

9 : SILICATES (Germanates)
A : Nesosilicates
E : Nesosilicates with additional anions (O,OH,F,H2O); cations in tetrahedral [4] coordination
44.3.5.1

44 : ANTIMONATES
3 : Miscellaneous
17.7.17

17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate

Physical Properties of KatoptriteHide

Metallic
Transparency:
Opaque
Comment:
Lustre brilliant
Colour:
black; fire-red (thin sections); red in transmitted light
Streak:
red brown
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
On {001}, perfect, micaceous.
Density:
4.56 g/cm3 (Measured)    4.65 g/cm3 (Calculated)

Optical Data of KatoptriteHide

Type:
Biaxial (-)
RI values:
nα = 1.920 nβ = 1.950 nγ = 1.950
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v strong
Pleochroism:
Strong
Comments:
Red-brown to orange.
Comments:
2V small.

Chemical Properties of KatoptriteHide

Formula:
(Mn2+,Mg)13(Al,Fe3+)4Sb5+2(SiO4)2O20
IMA Formula:
Mn2+13Al4Sb5+2O20(SiO4)2
Common Impurities:
Fe,Ca,H2O

Crystallography of KatoptriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 5.617 Å, b = 23.02 Å, c = 9.079 Å
β = 101.38°
Ratio:
a:b:c = 0.244 : 1 : 0.394
Unit Cell V:
1,150.87 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals commonly tabular {010}, elongated [100], [101], or equant. Minute grains or anhedral masses.

Type Occurrence of KatoptriteHide

Geological Setting of Type Material:
Metamorphosed limestone.
Associated Minerals at Type Locality:

Synonyms of KatoptriteHide

Other Language Names for KatoptriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Sonolite6 photos of Katoptrite associated with Sonolite on mindat.org.
Blatterite1 photo of Katoptrite associated with Blatterite on mindat.org.
Tegengrenite1 photo of Katoptrite associated with Tegengrenite on mindat.org.
Manganostibite1 photo of Katoptrite associated with Manganostibite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AE.05BerylliteBe3(SiO4)(OH)2 · H2OOrth.
9.AE.10EuclaseBeAl(SiO4)(OH)Mon. 2/m : P21/b
9.AE.15SverigeiteNaMnMgSnBe2(SiO4)3(OH)Orth. mmm (2/m 2/m 2/m) : Imma
9.AE.20HodgkinsoniteMn2+Zn2(SiO4)(OH)2Mon.
9.AE.25GerstmanniteMnMgZn(SiO4)(OH)2Orth.
9.AE.30ClinohedriteCaZn(SiO4) · H2OMon. m : Bb
9.AE.35StringhamiteCaCu(SiO4) · H2OMon.
9.AE.45YeatmaniteZn6Mn2+9Sb5+2(SiO4)4O12Tric.
9.AE.50SphaerobertranditeBe3(SiO4)(OH)2Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.7.1SuzukiiteBaVSi2O7Orth.
17.7.2FranciscaniteMn2+6(V5+,☐)2(SiO4)2(O,OH)6Hex.
17.7.3Kurumsakite(Zn,Ni,Cu)8Al8V5+2Si5O35 · 27H2O (?)
17.7.4Ardennite-(As)Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6Orth. mmm (2/m 2/m 2/m)
17.7.5MedaiteMn2+6V5+Si5O18(OH)Mon.
17.7.6JohninnesiteNa2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2Tric.
17.7.7TiragalloiteMn2+4As5+Si3O12(OH)Mon. 2/m
17.7.8DixeniteCuMn2+14Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)6Trig.
17.7.9AsbecasiteCa3(Ti,Sn4+)Be2(AsO3)6(SiO4)2Trig. 3m : P3c1
17.7.10McgoverniteMn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21Trig. 3m (3 2/m)
17.7.11KraissliteZn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)16Orth. 2 2 2 : C2 2 21
17.7.12SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
17.7.13Nelenite(Mn,Fe)16(Si12O30)(OH)14[As3+3O6(OH)3]Mon.
17.7.14KoliciteMn2+7Zn4(AsO4)2(SiO4)2(OH)8Orth. mmm (2/m 2/m 2/m) : Cmca
17.7.15YeatmaniteZn6Mn2+9Sb5+2(SiO4)4O12Tric.
17.7.16WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
17.7.18ParweliteMn10Sb2As2Si2O24Mon. m : Bb
17.7.19LångbaniteMn2+4Mn3+9Sb5+O16(SiO4)2Trig. 3m : P3m1
17.7.20ChapmaniteFe3+2Sb3+(Si2O5)O3(OH)Mon. m : Bm
17.7.21Cervandonite-(Ce)(Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH)Trig. 3m : R3m

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 KatoptriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Igelström (1885) Bulletin de la Société française de Minéralogie: 8: 143 (as Hematostibite).
Flink (1917) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 39: 426.
Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 206.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1027 (as Hematostibite), 1029-1030 (as Catoptrite).
American Mineralogist (1966): 51: 1484.
American Mineralogist (1977): 62: 396.
127: 47-61.
Moore, P.B. (1966) Catoptrite [katoptrite] and yeatmanite { stuffed pyrochroite structures? American Mineralogist: 51: 1494-1500.
Moore, P.B., T. Araki, and G.D. Brunton (1976) Catoptrite [katoptrite], (Mn2+5 Sb5+2)VI(Mn2+8Al4Si2)IVO28; a novel
close-packed oxide sheet structure. Neues Jahrbuch für Mineralogie, Abhandlungen: 127, 47-61.

Internet Links for KatoptriteHide

Localities for KatoptriteHide

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.
Sweden
 
  • Värmland
    • Filipstad
Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183. ; K:Gatedal
      • Nordmark district
        • Jakobsberg ore field
MinMag 62, 395; Kjell Gatedal
Nysten, P. (1987). Armangite from Nordmark. GFF, 109(2), 110-110.
Geologiska Föreningens i Stockholm. Förhandlingar, Stockholm (1917): 39: 431; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 787, 1030; Mineralogical Magazine (1978): 42, 133-136; Kjell Gatedal.
Nysten, P. (1994): Alabandit och synadelfit, Nordmark. Långbansnytt. vol 10. [reprinted in: Långbansnytt. De första 20 åren 1983-2003. Långbansällskapet - Skrifter och rapporter. 2, 43]; Nysten, P. (1987). Armangite from Nordmark. GFF, 109(2), 110-110.
Mineralogical Magazine (1998) 62 (3), 395-407
  • Västmanland
    • Hällefors
      • Grythyttan
Igelström (1885) Bulletin de la Société française de Minéralogie: 8: 143 (as Hematostibite).; Igelström, L.J. (1886): Polyarsenit och hæmatostibiit. Geologiska Föreningen i Stockholm Förhandlingar 8: 179-181; Moore, P. B. (1972). III. On Igelström's Manganese Arsenates and Antimonates from the Sjö Mine, Grythyttan, Örebro County, Sweden. GFF, 94(3), 423-434.
Mineral and/or Locality  
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