https://www.edelsteine-neuburg.de
https://www.mineralbox.biz
https://www.mineral-bosse.de
https://www.mineraliengrosshandel.com
https://weloveminerals.com/
'._('einklappen').'
 

Hawthorneite

Collectors Summary

Color hellgrau
Hardness (Mohs) 6.25
Crystal System hexagonal, P63/mmc

Chemism

Chemical formula

Ba[Ti3Cr4Fe4Mg]O19

Chemical composition

Barium, Chrom, Eisen, Magnesium, Titan, Sauerstoff

Unit weight: 1040.58867 u; Number of atoms in the formula: 32

Info

Empirical formula:

Ba[Ti3Cr4Fe4Mg]O19

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

29.21

19

59.38

15.9994300

303.9891700
Magnesium

Mg

2.34

1

3.13

24.3050600

24.3050600
Titanium

Ti

13.80

3

9.38

47.8671000

143.6013000
Chromium

Cr

19.99

4

12.50

51.9961600

207.9846400
Iron

Fe

21.47

4

12.50

55.8452000

223.3808000
Barium

Ba

13.20

1

3.13

137.3277000

137.3277000

Analysis wt%

TiO2 : 22.94, Cr2O3 : 34.05, FeO : 13.83, Fe2O3 : 11.31, MgO : 3.07, BaO : 12.52, K2O : 0.55, Ln2O3 : 0.41 (Ref: American Mineralogist 89)

Strunz 9th edition incl. updates

4.CC.45

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
C: Mit großen und mittelgroßen Kationen
45:Magnetoplumbit-Gruppe

Lapis Classification

IV/C.08-020

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)
8: Magnetoplumbit- Gruppe

Classification by Hölzel

4.CE.230

4: OXIDES
C: R2O3 Sesquioxides
E: Other complex Oxides, mostly hextrig
2: Hibonite-Magnetoplumbite-Group

Dana 8th edition

07.04.01.03

07: Multiple Oxides
04: Multiple Oxides with O19 groups
01: (Hexagonal, P63/mmc)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Magnetoplumbite group

Optical Properties

Color

hellgrau

Diaphaneity (Transparency)

opak

max. Birefringence

0.06
Birefringence chart\! Hawthorneite title=Birefringence chart Hawthorneite

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

2.39

RI value γ / ε

2.33

Ri mean

2.370

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Class (H-M)

6/mmm

Space Group number

194

Space Group

P63/mmc

Cell parameters a (Å)

5.871

Cell parameters b (Å)

-

Cell parameters c (Å)

23.06

Cell parameters a/b or c/a

3.928

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volume (ų)

688.358

X-Ray Powder Diffraction

4.652(20),
3.843(20),
2.936(40),
2.765(80),
2.616(100),
2.414(50),
2.226(30),
2.120(20)
XRD chart Hawthorneite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6.25

VHN (Hardness Vickers)

801 (100g)

Density (g/cm³)

5.02 (berechnet)

5.02 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Südafrika/Nordkap (Northern Cape), Provinz/Frances Baard, Distrikt/Kimberley/KEM JV Mine/Bultfontein Mine

Preface

Author (Name, Year)

Haggerty & Grey & Madsen & Criddle & Stanley & Erlank, 1989

References

Haggerty S E, Grey I E, Madsen I C, Criddle A J, Stanley C J, Erlank A J (1989) Hawthorneite, Ba[Ti3Cr4Fe4Mg]O19: a new metasomatic magnetoplumbite-type mineral from the upper mantle, - American Mineralogist 74 (1989), 668

IMA group assignments

Other languages

German

Hawthorneit

French

Hawthorneite

English

Hawthorneite

Spanish

Hawthorneíta

Russian

Хоторнеит

Alternative Name

Japanese

ホーソン石

CNMNC (IMA)-Number

IMA 1988-019

CNMNC symbol

Symbol

Hwt

Locations with GPS information

IDs

GUSID (Global unique identifier short form) XQejZ_URrk-rnob-_2P1QQ
GUID (Global unique identifier) 67A3075D-11F5-4FAE-AB9E-86FEFF63F541
Database ID 1535