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Hydroxykenoelsmoreite

Additional Functions

Collectors Summary

Color kanariengelb
Streak color blass gelb
Lustre Glasglanz
Hardness (Mohs) ~3
Fracture spröde
Crystal System trigonal, R3
Morphology Resseten bis 150μm im Durchmesser von plattigen Kristallen bis zu 20μm weite und kleiner 2μm Dicke

Chemism

Chemical formula

(☐,Pb)2(W,Fe3+,Al)2(O,OH)6(OH)

Empirical formula (analysis)

(☐1.668Pb0.315Ca0.009Na0.005K0.003Ba0.001)Σ2 (W6+1.487Fe3+0.357Al0.156)Σ2 (O4.119(OH)1.881)Σ6 (OH)

Chemical composition

Aluminium, Blei, Eisen, Sauerstoff, Wasserstoff, Wolfram, Vakanz

Unit weight: 478.41875576388 u; Number of atoms in the formula: 13.882

Info

Empirical formula:

(Vc1.668Pb0.315Ca0.009Na0.005K0.003Ba0.001)(W1.487Fe0.357Al0.156)(O4.119(OH)1.881)(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

1.67

12.02

0.0000000

0.0000000

Hydrogen

H

0.61

2.88

20.75

1.0079470

2.9038953

Oxygen

O

23.41

7

50.43

15.9994300

111.9960100

Sodium

Na

0.02

0.01

0.04

22.9897702

0.1149489

Aluminium

Al

0.88

0.16

1.12

26.9815382

4.2091200

Potassium

K

0.02

0

0.02

39.0983100

0.1172949

Calcium

Ca

0.08

0.01

0.06

40.0784000

0.3607056

Iron

Fe

4.17

0.36

2.57

55.8452000

19.9367364

Barium

Ba

0.03

0

0.01

137.3277000

0.1373277

Tungsten

W

57.14

1.49

10.71

183.8410000

273.3715670

Lead

Pb

13.64

0.32

2.27

207.2100000

65.2711500

Strunz 9th edition incl. updates

4.DH.15

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
H: Mit großen (± mittelgroßen) [Kationen]; Lagen kantenverknüpfter Oktaeder
15:Pyrochlor-Gruppe

IMA status

anerkannt - CNMNC Newsletter No. 33, Oktober 2016

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Pyrochlore supergroup  ⇒ Elsmoréite group

Optical Properties

Color

kanariengelb

Streak color

blass gelb

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

RI value α / ω / n

nave = 2.065

2V angle

Uniaxial (-)

Pleochroism

keiner

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

146

Space Group

R3

Cell parameters a (Å)

7.2855(10)

Cell parameters b (Å)

-

Cell parameters c (Å)

17.858(4)

Cell parameters a/b or c/a

2.451

Cell parameters c/b

-

Z

6

Volumne (ų)

820.885

Kristall structure

Struktur bestimmt; Pyrochlor-Supergruppe

X-Ray Powder Diffraction

5.99(51), 3.128(64), 2.983(100), 2.582(32), 1.825(57), 1.558(47), 1.490(14), 1.186(20)

XRD chart Hydroxykenoelsmoreite

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

Morphology

Resseten bis 150μm im Durchmesser von plattigen Kristallen bis zu 20μm weite und kleiner 2μm Dicke

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

~3

Density (g/cm³)

5.806 (berechnet)

5.806 ( ρ calc. Mineralienatlas )

Fracture

spröde

(Co-)Type locality

(Co-)Type locality

Burundi/Muyinga, Provinz/Masaka Goldmine

Type material

Museum Victoria, Melbourne, Victoria, Australien

Collection number of type material

M53606

Paragenesis of type material

Goethit, Galenit

Preface

Author (Name, Year)

Stuart J. Mills, Andrew G. Christy, Anthony R. Kampf, William D. Birch und Anatoly Kasatkin (2016)

References

Mills, SJ, Christy, AG, Kampf, AR, Birke, WD und Kasatkin, A. (2016) Hydroxykenoelsmoreite, IMA 2016-056. CNMNC Newsletter Nr 33, Oktober 2016, Seite 1141; Mineralogical Magazine, 80, 1135-1144.

Hydroxykenoelsmoreite, the first new mineral from the Republic of Burundi - Hydroxykenoelsmoreite, the first new mineral from the Republic of Burundi - European Journal of Mineralogy; Appeared or available online: 10. Januar 2017

IMA group assignments

Other languages

German

Hydroxykenoelsmoreit

English

Hydroxykenoelsmoreite

Russian

Гидроксикеноэлсмореит

CNMNC (IMA)-Number

IMA 2016-056

CNMNC symbol

Symbol

Hykm