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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
(Mg,Mn
2+
 
)Zn(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
(Mn
2+
 
,Mg)
 
24
Zn
 
4
(SiO
 
4
)
 
8
(AsO
 
4
)
 
4
(OH)
 
12
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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