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Katoptrite

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Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden
© Kjell Gatedal

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Formula:
(Mn
2+
 
,Mg)
 
13
(Al,Fe
3+
 
)
 
4
Sb
5+
2
(SiO
 
4
)
 
2
O
 
20
System:MonoclinicColour:black; fire-red (thin ...
Hardness:5½
Name:From the Greek κάτοπτρου for "mirror" in allusion to the glassy reflections off its cleavages.
This page provides mineralogical data about Katoptrite.

Classification of Katoptrite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/B.09-30
Nickel-Strunz 10th (pending) edition ID:9.AE.40

9 : SILICATES (Germanates)
A : Nesosilicates
E : Nesosilicates with additional anions (O,OH,F,H2O); cations in tetrahedral [4] coordination
Dana 8th edition ID:44.3.5.1

44 : ANTIMONATES
3 : Miscellaneous
Hey's CIM Ref.:17.7.17

17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
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Type Occurrence of Katoptrite

Type Locality:Brattfors Mine, Nordmark (Nordmarksberg), Filipstad, Värmland, Sweden
Year of Discovery:1917
Geological Setting of type material:Metamorphosed limestone.
Associated Minerals at type locality:
ManganositeMagnetiteGarnet Structural Group

Physical Properties of Katoptrite

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

Crystallography of Katoptrite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 5.617Å, b = 23.02Å, c = 9.079Å
β = 101.38°
Ratio:a:b:c = 0.244 : 1 : 0.394
Unit Cell Volume: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.

Optical Data of Katoptrite

Type:Biaxial (-)
RI values: nα = 1.920 nβ = 1.950 nγ = 1.950
Maximum Birefringence:δ = 0.030

Chart 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 Katoptrite

Formula:
(Mn
2+
 
,Mg)
 
13
(Al,Fe
3+
 
)
 
4
Sb
5+
2
(SiO
 
4
)
 
2
O
 
20
Essential elements:Al, Mn, O, Sb, Si
All elements listed in formula:Al, Fe, Mg, Mn, O, Sb, Si
Common Impurities:Fe,Ca,H2O

Relationship of Katoptrite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.AE.05Beryllite
Be
 
3
(SiO
 
4
)(OH)
 
2
 · H
 
2
O
9.AE.10Euclase
BeAl(SiO
 
4
)(OH)
9.AE.15Sverigeite
NaMnMgSnBe
 
2
(SiO
 
4
)
 
3
(OH)
9.AE.20Hodgkinsonite
Mn
2+
 
Zn
 
2
(SiO
 
4
)(OH)
 
2
9.AE.25Gerstmannite
MnMgZn(SiO
 
4
)(OH)
 
2
9.AE.30Clinohedrite
CaZn(SiO
 
4
) · H
 
2
O
9.AE.35Stringhamite
CaCu(SiO
 
4
) · H
 
2
O
9.AE.45Yeatmanite
Zn
 
6
Mn
2+
9
Sb
5+
2
(SiO
 
4
)
 
4
O
 
12
9.AE.50Sphaerobertrandite
Be
 
3
(SiO
 
4
)(OH)
 
2
Related Minerals - Hey's Index Grouping:

- +
17.7.1Suzukiite
BaVSi
 
2
O
 
7
17.7.2Franciscanite
Mn
2+
6
(V
5+
 
,☐)
 
2
(SiO
 
4
)
 
2
(O,OH)
 
6
17.7.3Kurumsakite
(Zn,Ni,Cu)
 
8
Al
 
8
V
5+
2
Si
 
5
O
 
35
 · 27H
 
2
O (?)
17.7.4Ardennite-(As)
Mn
2+
4
(Al,Mg)
 
6
(Si
 
3
O
 
10
)(SiO
 
4
)
 
2
(AsO
 
4
,VO
 
4
)(OH)
 
6
17.7.5Medaite
(Mn,Ca)
 
6
(V,As)Si
 
5
O
 
18
OH
17.7.6Johninnesite
Na
 
2
Mn
2+
9
Mg
 
7
(OH)
 
8
[AsO
 
4
]
 
2
[Si
 
6
O
 
17
]
 
2
17.7.7Tiragalloite
Mn
2+
4
(HAsSi
 
3
O
 
13
)
17.7.8Dixenite
CuMn
2+
14
Fe
2+
 
(SiO
 
4
)
 
2
(As
5+
 
O
 
4
)(As
3+
 
O
 
3
)
 
5
(OH)
 
6
17.7.9Asbecasite
Ca
 
3
(Ti,Sn
4+
 
)Be
 
2
(AsO
 
3
)
 
6
(SiO
 
4
)
 
2
17.7.10Mcgovernite
Mn
 
19
Zn
 
3
(AsO
 
4
)
 
3
(AsO
 
3
)(SiO
 
4
)
 
3
(OH)
 
21
17.7.11Kraisslite
Zn
 
3
(Mn,Mg)
 
25
(Fe
3+
 
,Al)(As
3+
 
O
 
3
)
 
2
[(Si,As
5+
 
)O
 
4
]
 
10
(OH)
 
16
17.7.12Schallerite
(Mn,Fe)
 
16
Si
 
12
As
 
3
O
 
36
(OH)
 
17
17.7.13Nelenite
(Mn,Fe)
 
16
(Si
 
12
O
 
30
)(OH)
 
14
[As
3+
3
O
 
6
(OH)
 
3
]
17.7.14Kolicite
Mn
2+
7
Zn
 
4
(AsO
 
4
)
 
2
(SiO
 
4
)
 
2
(OH)
 
8
17.7.15Yeatmanite
Zn
 
6
Mn
2+
9
Sb
5+
2
(SiO
 
4
)
 
4
O
 
12
17.7.16Welshite
Ca
 
4
Mg
 
9
Sb
 
3
O
 
4
[Si
 
6
Be
 
3
AlFe
 
2
O
 
36
]
17.7.18Parwelite
Mn
 
10
Sb
 
2
As
 
2
Si
 
2
O
 
24
17.7.19Långbanite
(Mn
2+
 
,Ca)
 
4
(Mn
3+
 
,Fe
3+
 
)
 
9
Sb
5+
 
(SiO
 
4
)
 
2
O
 
16
17.7.20Chapmanite
Fe
3+
2
Sb
3+
 
(SiO
 
4
)
 
2
(OH)
17.7.21Cervandonite-(Ce)
(Ce,Nd,La)(Fe
3+
 
,Fe
2+
 
,Ti,Al)
 
3
O
 
2
(Si
 
2
O
 
7
)(As
3+
 
O
 
3
)(OH)

Other Names for Katoptrite

Synonyms:
CatoptriteHaematostibiiteHämatostibiiteHematostibiiteHematostibite
Other Languages:
German:Catoptrit
Haematostibiit
Hämatostibiit
Hematostibiit
Hematostibit
Katoptrit
Russian:Катоптрит
Spanish:Catoptrita
Haematostibiita
Hämatostibiita
Hematostibiita
Hematostibita
Katoptrita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Katoptrite

Reference List:

- +
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 Katoptrite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Katoptrite details from Handbook of Mineralogy (PDF)
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    • Localities for Katoptrite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    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 (Nordmarksberg)
    		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.
    MinMag 62, 395; Kjell Gatedal
    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
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    Copyright © Jolyon Ralph and Ida Chau 1993-2013. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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