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Usovite

Pictures (3 Images total)

Usovit
Views (Image: 1219662585): 1807
Usovit

Bildbreite: 2 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Deutschland

Copyright: Stephan Wolfsried
Contribution: Hg 2008-08-25
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland
Usovit
Views (Image: 1589471971): 382
Usovit

FO: Grube Clara / Oberwolfach; BB 1 mm

Copyright: Halden-Joerg
Contribution: Halden-Joerg 2020-05-14
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland
Usovit xx, Bariopharmakosiderit xx
Views (Image: 1643273117): 108
Usovit xx, Bariopharmakosiderit xx

BB 0,9 mm, Aufn. 142 nach der Stacking Methode

Collection: Karlheinz Grosch
Copyright: Karlheinz Grosch
Contribution: Karlheinz Grosch 2022-01-27
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland

Collectors Summary

Color braun, dunkelbraun, gelblichbraun
Streak color weiß
Hardness (Mohs) 3.5
Solubility +++ heiße HCl, HNO3, H2SO4
Crystal System monoklin, C2/c

Chemism

Chem­ical formula

Ba2CaMgAl2F14

Chem­ical com­po­si­tion

Aluminium, Barium, Calcium, Magnesium, Fluor

Unit weight: 658.9795819 u; Number of atoms in the formula: 20

Info

Empirical formula:

Ba2CaMgAl2F14

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Fluorine

F

40.36

14

70.00

18.9984033

265.9776455

Magnesium

Mg

3.69

1

5.00

24.3050600

24.3050600

Aluminium

Al

8.19

2

10.00

26.9815382

53.9630764

Calcium

Ca

6.08

1

5.00

40.0784000

40.0784000

Barium

Ba

41.68

2

10.00

137.3277000

274.6554000

Anal­y­sis wt%

Al2O3 : 16.06, MgO : 6.06, BaO : 44.04, CaO : 8.40, H2O : 0.46, F : 39.80, SiO2 : 1.40 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 67)

Strunz 9th edi­tion incl. updates

3.CB.35

3: Halide (Fluoride, Chloride, Bromide, Iodide)
C: Komplexe Halogenide
B: Insel-Aluminofluoride (Neso-Aluminofluoride)
35:Usovit-Gruppe

Lapis Clas­sifica­tion

III/C.03-040

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
C: Doppelhalogenide (meist mit OH,H2O)
3: Fluoride

Clas­sifica­tion by Hölzel

3.DD.260

3: HALIDES
D: Complex Halides
D: Fluoro-Aluminates

Dana 8th edi­tion

11.06.14.01

11: Halide Complexes; Alumino-fluorides
06: Halide Complexes; Alumino-fluorides with miscellaneous formulae

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

braun, dunkelbraun, gelblichbraun

Streak color

weiß

Diaphane­ity (Trans­parency)

durchscheinend bis opak

max. Birefrin­gence

0.003

Birefringence chart\! Usovite title=Birefringence chart Usovite

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

1.441

RI value β

1.442

RI value γ / ε

1.444

Ri mean

1.442

2V angle

Biaxial (+) 70°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell param­e­ters a (Å)

13.565

Cell param­e­ters b (Å)

5.200

Cell param­e­ters c (Å)

14.557

Cell param­e­ters a/b or c/a

2.609

Cell param­e­ters c/b

2.799

Cell param­e­ters α

90°

Cell param­e­ters β

91.35

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1026.537

X-Ray Pow­der Diffrac­tion

3.41(100),
1.747(70),
1.205(90),
1.132(80),
1.093(80),
1.025(90),
1.012(80),
1.005(80)

XRD chart Usovite

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)

3.5

VHN (Hard­ness Vick­ers)

294

Density (g/cm³)

4.18

4.264 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ heiße HCl, HNO3, H2SO4

Preface

Author (Name, Year)

Nozhkin & Gavrilenko & Moleva, 1967

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 96 (1967), 63

Other languages

German

Usovit

Spanish

Usovita

English

Usovite

French

Usovite

Russian

Усовит

Alternative Name

German

Usowit

CNMNC (IMA)-Number

IMA 1966-038

CNMNC symbol

Symbol

Usv

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

German pages

DeWikiPedia - search for: Usovit
Google-Bilder-Suche - search for: Usovit
Mineralienatlas.de (Forum) - search for: Usovit

English pages

Mindat - search for: Usovite
Webmineral - search for:Usovite
Handbook-of-Mineralogy - search for: Usovite
RRUFF - Raman, XRD and other mineral data - search for: Usovite
RRUFF - References and PDF downloads - search for: Usovite
American-Mineralogist-Crystal-Structure-Database - search for: Usovite
Strahlen.org - search for: Usovite

Russian pages

Webmineral.ru - search for: Усовит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Usovit
Crystal-Treasure.com - search for: Usovit
Bosse - search for: Usovit
Edelsteine Neuburg - Gundolf Fischer - search for: Usovit

Locations with GPS information