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Katophorite (Magnesiokatophorit)

Pictures (4 Images total)

Katophorit
Views (File:
1292182731
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Katophorit
Schwarzbrauner langprismatischer Kristall mit Phlogopit und Sanidin, BB 4,6 mm. Fundort: Hendersons Quarry, Ngongotaha, Region Bay Of Plenty, North Island, Neuseeland
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter
Location: Neuseeland/North Island/Bay of Plenty, Region/Rotorua/Ngongotaha/Hendersons Quarry
Mineral: Katophorite
Image: 1292182731
License: Usage for Mineralienatlas project only
Katophorit

Schwarzbrauner langprismatischer Kristall mit Phlogopit und Sanidin, BB 4,6 mm. Fundort: Hendersons Quarry, Ngongotaha, Region Bay Of Plenty, North Island, Neuseeland
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2010-12-12
Locality: Hendersons Quarry / Ngongotaha / Rotorua / Bay of Plenty, Region / North Island / Neuseeland
Kataphorit in Oligoklas
Views (File:
1623179491
): 252
Kataphorit in Oligoklas
Sandefjord, Kommune, Vestfold og Telemark, NO. BB: 6cm.
Copyright: Doc Diether; Contribution: Doc Diether
Collection: Doc Diether
Location: Norwegen/Vestfold og Telemark, Provinz/Sandefjord, Kommune
Mineral: Katophorite, Oligoclase
Image: 1623179491
License: Usage for Mineralienatlas project only
Kataphorit in Oligoklas

Sandefjord, Kommune, Vestfold og Telemark, NO. BB: 6cm.
Collection: Doc Diether
Copyright: Doc Diether
Contribution: Doc Diether 2021-06-08
Locality: Sandefjord, Kommune / Vestfold og Telemark, Provinz / Norwegen
Katophorit von La Maraeta, Teneriffa
Views (File:
1646759779
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Katophorit von La Maraeta, Teneriffa
Schwarze isometrische Kristalle mit farblos-grauem Kryolith und grünem Aegirin in Kalsilit Syenit . Bildbreite 3,2 mm
Copyright: Kurt Rüsenberg; Contribution: humboldt
Collection: humboldt
Location: Spanien/Kanarische Inseln/Teneriffa/La Mareta
Mineral: Aegirine, Cryolite, Katophorite
Rock: kalsilite syenite
Image: 1646759779
License: Usage for Mineralienatlas project only
Katophorit von La Maraeta, Teneriffa

Schwarze isometrische Kristalle mit farblos-grauem Kryolith und grünem Aegirin in Kalsilit Syenit . Bildbreite 3,2 mm
Collection: humboldt
Copyright: Kurt Rüsenberg
Contribution: humboldt 2022-03-08
Locality: La Mareta / Teneriffa / Kanarische Inseln / Spanien
Holmquistit mit Katophorit von La Mareta, Teneriffa
Views (File:
1649436974
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Holmquistit mit Katophorit von La Mareta, Teneriffa
Nadeliger Holmquistit mit blockigem Katophorit. Bildbreite 2,5 mm
Copyright: Kurt Rüsenberg; Contribution: humboldt
Collection: humboldt
Location: Spanien/Kanarische Inseln/Teneriffa/La Mareta
Mineral: Holmquistite, Katophorite
Image: 1649436974
License: Usage for Mineralienatlas project only
Holmquistit mit Katophorit von La Mareta, Teneriffa

Nadeliger Holmquistit mit blockigem Katophorit. Bildbreite 2,5 mm
Collection: humboldt
Copyright: Kurt Rüsenberg
Contribution: humboldt 2022-04-08
Locality: La Mareta / Teneriffa / Kanarische Inseln / Spanien

You find additional Magnesiokatophorit specimen at the Geolitho Museum

Collectors Summary

Color schwarz, grünlichschwarz, rötlichschwarz
Lustre Glasglanz
Hardness (Mohs) 5 - 6
Solubility -
Crystal System monoklin, C2/m

Additional information / Summary

Neudefinition vom Amphibol SubKomitee (1997), Umbenennung von Magnesiokatophorit zu Katophorit (2012)

Chemism

Chemical formula

Na(NaCa)(Mg4Al)(Si7Al)O22(OH)2

Chemical composition

Aluminium, Calcium, Magnesium, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 819.8421808 u; Number of atoms in the formula: 42

Info

Empirical formula:

Na(NaCa)(Mg4Al)(Si7Al)O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.25

2

4.76

1.0079470

2.0158940
Oxygen

O

46.84

24

57.14

15.9994300

383.9863200
Sodium

Na

5.61

2

4.76

22.9897702

45.9795404
Magnesium

Mg

11.86

4

9.52

24.3050600

97.2202400
Aluminium

Al

6.58

2

4.76

26.9815382

53.9630764
Silicon

Si

23.98

7

16.67

28.0855300

196.5987100
Calcium

Ca

4.89

1

2.38

40.0784000

40.0784000

Analysis wt%

SiO2 : 45.45, Al2O3 : 7.71, Fe2O3 : 5.18, FeO : 21.74, MgO : 5.23, CaO : 6.06, Na2O : 6.70, H2O : 1.95 (Ref: berechnet)

Strunz 9th edition incl. updates

9.DI.400

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
I:
400:

Lapis Classification

VIII/F.09-030

VIII: SILIKATE
F: Ketten- und Bandsilikate
9: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Na-Ca-Amphibole

Classification by Hölzel

9.DI.420

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
I: Amphiboles; Sodiccalcic Amphiboles
4: Katophorite-Group

Dana 8th edition

66.01.03b.12

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration
03b: Group 3, the sodic-calcic amphiboles

IMA status

Neudefinition von der CNMNC anerkannt - CNMNC Newsletter No. 20, June 2014, page 554

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Sodium-calcium amphiboles  ⇒ Katophorite (Ktp) amphiboles

Optical Properties

Color

schwarz, grünlichschwarz, rötlichschwarz

Diaphaneity (Transparency)

transparent, duchscheinend

Lustre

Glasglanz

max. Birefringence

0.021
Birefringence chart\! Katophorite title=Birefringence chart Katophorite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.639-1.681

RI value β

1.658-1.688

RI value γ / ε

1.660-1.690

Ri mean

1.669

2V angle

Biaxial (-) 0° - 50° (gemessen) 36° (berechnet)

Orientation

Y = b

Dispersion

Stark, r < v

Absorption

Z > Z = X

Pleochroism

Stark; gelb zu rötlichbraun

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

9.8573(8)

Cell parameters b (Å)

17.962(1)

Cell parameters c (Å)

5.2833(4)

Cell parameters a/b or c/a

0.549

Cell parameters c/b

0.294

Cell parameters α

90°

Cell parameters β

104.707(2)º

Cell parameters γ

90°

Z

2

Volumne (ų)

904.796

Kristall structure

Struktur bestimmt

X-Ray Powder Diffraction

8.421(55), 3.378(61), 3.129(69), 2.942(43), 2.700(100), 2.583(46), 2.536(65), 2.334(41)
XRD chart Katophorite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5 - 6

Density (g/cm³)

3.3 (gemessen) 3.31 (berechnet)

3.009 ( ρ calc. Mineralienatlas )

Instability

-

(Co-)Type locality

(Co-)Type locality

Myanmar (Burma)/Kachin-Staat/Mohnyin, Distrikt/Hpakant Township/Hpakant-Tawmaw Jade-Gangzug

Type material

Earth and Planetary Sciences, American Museum of Natural History, New York, NY, USA

Collection number of type material

H32374

Preface

Author (Name, Year)

Roberta Oberti, Massimo Boiocchi, Frank C. Hawthorne, Neil A. Ball and George E. Harlow (2014)

ehemals Brøgger, 1894

References

Canadian Mineralogist 35 (1997), 219

Canadian Mineralogist 34 (1996), 577

American Mineralogist 78 (1993), 733

Rock-forming Minerals (Deer, Howie & Zussmann), 2B, 2nd ed. (1997), Table 25, anal. 8, 9, 14

Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A. and Harlow, G.E. (2014) Katophorite, IMA 2013-140. CNMNC Newsletter No. 20, June 2014, page 554; Mineralogical Magazine, 78, 549-558. [Neudefinition]

Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A., Harlow, G.E. - Katophorite from the Jade Mine Tract, Myanmar: mineral description of a rare (grandfathered) endmember of the amphibole supergroup. Mineralogical Magazine, 79 (2015), (in press).

IMA group assignments

Other languages

German

Katophorit

Spanish

Katophorita

French

Katophorite

English

Katophorite

Russian

Катофорит

Simplified Chinese

镁红闪石

Japanese

ｶﾄﾌｫﾗ閃石（総称）

old name

Spanish

Magnesiocatoforita

Magnesiokatophorit

English

Magnesiokatophorite

Japanese

苦土カトフォラ閃石

Alternative Name

Alumino-kataphorite

German

Aluminokatophorit

Spanish

Aluminokatophorita

English

Aluminokatophorite

German

Cataphorit

Spanish

Cataphorita

Cataphorite

German

Catoforit

Spanish

Catoforita

Catoforite

German

Catophorit

Spanish

Catophorita

English

Catophorite

English

Magnesio-aluminokatophorite

Italian

Magnesiokatophorita

CNMNC (IMA)-Number

IMA 2013-140

CNMNC symbol

Symbol

Ktp

Locations with GPS information