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Qitianlingite

Collectors Summary

Color schwarz
Hardness (Mohs) 5.5
Solubility - verdünnte HCl
Crystal System orthorhombisch, Pbcn

Chemism

Chemical formula

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

Chemical composition

Eisen, Mangan, Niob, Tantal, Sauerstoff, Wolfram

Unit weight: 684.90565295 u; Number of atoms in the formula: 15

Info

Empirical formula:

(Fe0.75Mn0.25)2(Nb0.75Ta0.25)2WO10

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

23.36

10

66.67

15.9994300

159.9943000
Manganese

Mn

4.01

0.5

3.33

54.9380499

27.4690250
Iron

Fe

12.23

1.5

10.00

55.8452000

83.7678000
Niobium

Nb

20.35

1.5

10.00

92.9063820

139.3595730
Tantalum

Ta

13.21

0.5

3.33

180.9479100

90.4739550
Tungsten

W

26.84

1

6.67

183.8410000

183.8410000

Analysis wt%

MnO : 6.01, FeO : 14.64, Nb2O5 : 34.06, Ta2O5 : 11.73, TiO2 : 1.23, WO3 : 32.30 (Ref: American Mineralogist S85)

Strunz 9th edition incl. updates

4.DB.35

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
B: Mit mittelgroßen [Kationen]: Ketten kantenverknüpfter Oktaeder
35:Columbit-Gruppe

Lapis Classification

IV/D.17-010

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

Classification by Hölzel

4.DH.300

4: OXIDES
D: Dioxides
H: Wolframite-Group

Dana 8th edition

08.01.12.01

08: Multiple Oxides with Nb, Ta, and Ti
01: Multiple Oxides with Nb, Ta, and Ti where A BO4

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Columbite supergroup  ⇒ Columbite group

Optical Properties

Color

schwarz

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

60

Space Group

Pbcn

Cell parameters a (Å)

23.706

Cell parameters b (Å)

5.723

Cell parameters c (Å)

5.045

Cell parameters a/b or c/a

4.142

Cell parameters c/b

0.882

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

684.452

X-Ray Powder Diffraction

3.65(70),
2.96(100),
2.87(60),
2.52(70),
1.773(80),
1.385(60),
1.194(60)
XRD chart Qitianlingite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

550 (50g)

Density (g/cm³)

6.42

6.646 ( ρ calc. Mineralienatlas )

Instability

- verdünnte HCl

(Co-)Type locality

(Co-)Type locality

China/Hunan, Provinz/Chenzhou, Präfektur/Yizhang, Kreis/Qitian-Gebirge (Qitian Ling)

Preface

Author (Name, Year)

Yang & Wang & Peng & Bu, 1985

References

Acta Mineralogica Sinica (in Chinese) 5 (1985), 193

IMA group assignments

Other languages

German

Qitianlingit

Spanish

Qitianlingita

English

Qitianlingite

French

Qitianlingite

Japanese

ｷﾃｱﾝﾘﾝｸﾞｱｲﾄ

Alternative Name

Qitianglinit

Qitianglinita

Qitianglinite

CNMNC (IMA)-Number

IMA 1983-075

CNMNC symbol

Symbol

Qit

Locations with GPS information

IDs

GUSID (Global unique identifier short form) yWYbHn31D02FjcVOvqKrBA
GUID (Global unique identifier) 1E1B66C9-F57D-4D0F-858D-C54EBEA2AB04
Database ID 3180