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Koragoite

Pictures (2 Images total)

Koragoit in Mikroklin
Views (Image: 1243972534): 1019
Koragoit in Mikroklin

Bildbreite: 10 mm; Fundort: Vez-Dara-Tal, Pamir-Hochgebirge, Berg-Badachschan, Tadschikistan

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-02
Locality: Vez-Dara-Tal / Schachadara-Gebirge / Chorugh / Pamir-Hochgebirge / Berg-Badachschan, Provinz / Tadschikistan
Koragoit in Mikroklin
Views (Image: 1243972505): 944
Koragoit in Mikroklin

Bildbreite: 5 mm; Fundort: Vez-Dara-Tal, Pamir-Hochgebirge, Berg-Badachschan, Tadschikistan

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-02
Locality: Vez-Dara-Tal / Schachadara-Gebirge / Chorugh / Pamir-Hochgebirge / Berg-Badachschan, Provinz / Tadschikistan

Collectors Summary

Color hellgrau
Streak color graulich braun
Hardness (Mohs) 5.5
Cleavages keine
Fracture uneben
Crystal System monoklin, P21

Chemism

Chem­ical formula

Mn2+2Mn3+Nb2(Nb,Ta)3W2O20

Chem­ical com­po­si­tion

Mangan, Niob, Tantal, Sauerstoff, Wolfram

Unit weight: 1383.0478057 u; Number of atoms in the formula: 30

Info

Empirical formula:

Mn2MnNb2(Nb0.75Ta0.25)3W2O20

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

23.14

20

66.67

15.9994300

319.9886000

Manganese

Mn

11.92

3

10.00

54.9380499

164.8141497

Niobium

Nb

28.55

4.25

14.17

92.9063820

394.8521235

Tantalum

Ta

9.81

0.75

2.50

180.9479100

135.7109325

Tungsten

W

26.58

2

6.67

183.8410000

367.6820000

Anal­y­sis wt%

MnO : 19.97, FeO : 0.69, Nb2O5 : 36.84, Ta2O5 : 9.46, TiO2 : 0.49, WO3 : 32.16 (Ref: Kristallografiya 95)

Strunz 9th edi­tion incl. updates

4.DE.10

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
E: Mit mittelgroßen [Kationen]; Mit verschiedenen Polyedern
10:Koragoit-Gruppe

Lapis Clas­sifica­tion

IV/D.17-005

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

Clas­sifica­tion by Hölzel

4.DH.310

4: OXIDES
D: Dioxides
H: Wolframite-Group

Dana 8th edi­tion

08.07.12.01

08: Multiple Oxides with Nb, Ta, and Ti
07: Multiple Oxides with Nb, Ta, and Ti

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

hellgrau

Streak color

graulich braun

Diaphane­ity (Trans­parency)

opak

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2

Space Group number

4

Space Group

P21

Cell param­e­ters a (Å)

24.73

Cell param­e­ters b (Å)

5.056

Cell param­e­ters c (Å)

5.760

Cell param­e­ters a/b or c/a

4.891

Cell param­e­ters c/b

1.139

Cell param­e­ters α

90°

Cell param­e­ters β

103.50

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

700.302

X-Ray Pow­der Diffrac­tion

6.0(50),
3.74(80),
3.69(80),
2.98(100),
1.783(50),
1.744(60),
1.732(70),
1.456(50)

XRD chart Koragoite

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)

5.5

VHN (Hard­ness Vick­ers)

550 (50g)

Density (g/cm³)

6.22 (berechnet)

6.559 ( ρ calc. Mineralienatlas )

Cleav­ages

keine

Frac­ture

uneben

Tenac­ity

spröde

Preface

Author (Name, Year)

Yamnova & Pushcharovskiy & Voloshin, 1995

References

Transactions (Doklady) of the USSR Academy of Sciences, Earth Science Sections 353A (1997), 341

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Koragoite

Mn2+2Mn3+Nb2(Nb,Ta)3W2O20

monoklin : 2 : P21

4.DE.10

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Koragoite

Mn2+2Mn3+Nb2(Nb,Ta)3W2O20

monoklin : 2 : P21

IV/D.17-005

Qitianlingite

(Fe2+,Mn)2(Nb,Ta)2W6+O10

orthorhombisch : mmm : Pbcn

IV/D.17-010

Ixiolite

(Ta,Mn,Nb)O2

orthorhombisch : mmm : Pbcn

IV/D.17-030

Titanowodginite

(Mn2+,Fe2+)(Ti,Sn,Ta,Sc)(Ta,Nb)2O8

monoklin : 2/m : C2/c

IV/D.17-040

Wodginite

Mn2+Sn4+Ta2O8

monoklin : 2/m : C2/c

IV/D.17-050

Ferrotitanowodginite

(Fe2+,Mn2+)(Ti,Sn4+,Ta,Fe3+)(Ta,Nb)2O8

monoklin : 2/m : C2/c

IV/D.17-055

Ferrowodginite

(Fe2+,Mn2+)(Sn,Ti,Fe3+,Ta)(Ta,Nb)2O8

monoklin : 2/m : C2/c

IV/D.17-060

Lithiowodginite

(Li,Mn,Fe)(Ta,Nb,Sn)3O8

monoklin : 2/m : C2/c

IV/D.17-070

Tantalowodginite

(Mn2+,☐)TaTa2O8

monoklin : 2/m : C2/c

IV/D.17-080

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Qitianlingite

(Fe2+,Mn)2(Nb,Ta)2W6+O10

orthorhombisch : mmm : Pbcn

4.DH.300

Koragoite

Mn2+2Mn3+Nb2(Nb,Ta)3W2O20

monoklin : 2 : P21

4.DH.310

Billwiseite

Sb3+5(Nb,Ta)3WO18

monoklin : 2/m : C2/c

4.DH.360

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Zimbabweite

(Na,K)2PbAs43+(Ta,Nb,Ti)4O18

orthorhombisch : mmm : Ccmb

08.07.10.01

Cesplumtantite

(Cs,Na)2(Pb,Sb3+)3Ta8O24

08.07.11.01

Koragoite

Mn2+2Mn3+Nb2(Nb,Ta)3W2O20

monoklin : 2 : P21

08.07.12.01

Carmichaelite

(Ti,Cr,Fe)(O,OH)2

monoklin : 2/m : P21/c

08.07.13.01

IMA Number

IMA 1994-049

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Koragoit
Google-Bilder-Suche - search for: Koragoit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Koragoit

English pages

Mindat - search for: Koragoite
Webmineral - search for:Koragoite
Handbook-of-Mineralogy - search for: Koragoite
RRUFF - Raman, XRD and other mineral data - search for: Koragoite
RRUFF - References and PDF downloads - search for: Koragoite
American-Mineralogist-Crystal-Structure-Database - search for: Koragoite
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Russian pages

Webmineral.ru - search for: Корагоит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Koragoit
Bosse - search for: Koragoit

Locations with GPS information