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Bassanite (Bassanit)

Pictures (4 Images total)

Bassanit
Views (File:
1358812628
): 3164
Bassanit
Absetzerhalde / Ronneburg / Thüringen / Deutschland; Bildbreite 5 mm.
Copyright: Leonardus; Contribution: Leonardus
Collection: Leonardus
Location: Deutschland/Thüringen/Greiz, Landkreis/Ronneburg/Absetzerhalde
Mineral: Bassanite
Image: 1358812628
Rating: 6.5 (votes: 2)
License: Usage for Mineralienatlas project only
Bassanit

Absetzerhalde / Ronneburg / Thüringen / Deutschland; Bildbreite 5 mm.

Collection: Leonardus
Copyright: Leonardus
Contribution: Leonardus 2013-01-22
Locality: Absetzerhalde / Ronneburg / Greiz, Landkreis / Thüringen / Deutschland
Bassanit xx
Views (File:
1175975158
): 3740
Bassanit xx
Bildbreite: 4 mm; Fundort: Kladno Mine, Libusin, Kladno, Tschechien
Copyright: loismin; Contribution: loismin
Location: Tschechien/Mittelböhmen (Středočeský kraj)/Kladno, Bezirk/Libusin/Kladno Mine (Schöller Mine; Schoeller Mine; Zdenek Nejedlý Mine; Nejedlý I Mine)
Mineral: Bassanite
Image: 1175975158
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Bassanit xx

Bildbreite: 4 mm; Fundort: Kladno Mine, Libusin, Kladno, Tschechien

Copyright: loismin
Contribution: loismin 2007-04-07
Locality: Kladno Mine (Schöller Mine; Schoeller Mine; Zdenek Nejedlý Mine; Nejedlý I Mine) / Libusin / Kladno, Bezirk / Mittelböhmen (Středočeský kraj) / Tschechien
Bassanit
Views (File:
1267129064
): 3088
Bassanit
Größe: 30x26 mm; Fundort: Kimba, Eyre Peninsula, South Australia, Australien
Copyright: John Sobolewski; Contribution: slugslayer
Location: Australien/South Australia/Eyre Peninsula/Kimba
Mineral: Bassanite
Image: 1267129064
License: Usage for Mineralienatlas project only
Bassanit

Größe: 30x26 mm; Fundort: Kimba, Eyre Peninsula, South Australia, Australien

Copyright: John Sobolewski
Contribution: slugslayer 2010-02-25
Locality: Kimba / Eyre Peninsula / South Australia / Australien
Bassanit
Views (File:
1394811506
): 1969
Bassanit
weiße, dünntafelige Bassanit xx gemeinsam auf einer Stufe mit nadeligen Selen xx; Absetzerhalde, Ronneburger Revier, Thüringen, BRD; Bildbreite: 3 mm
Copyright: chribiedav; Contribution: chribiedav
Collection: chribiedav
Location: Deutschland/Thüringen/Greiz, Landkreis/Ronneburg/Absetzerhalde
Mineral: Bassanite
Image: 1394811506
License: Usage for Mineralienatlas project only
Bassanit

weiße, dünntafelige Bassanit xx gemeinsam auf einer Stufe mit nadeligen Selen xx; Absetzerhalde, Ronneburger Revier, Thüringen, BRD; Bildbreite: 3 mm

Collection: chribiedav
Copyright: chribiedav
Contribution: chribiedav 2014-03-14
Locality: Absetzerhalde / Ronneburg / Greiz, Landkreis / Thüringen / Deutschland

Collectors Summary

Color farblos, schneeweiß
Streak color weiß
Solubility +++ H2O => Gips, dehydriert bei ca. 130°C
Crystal System monoklin, I2

Chemism

Chemical formula

CaSO4·0.5H2O

Chemical composition

Calcium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 145.149282 u; Number of atoms in the formula: 7.5

Info

Empirical formula:

CaSO4·0.5H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.69

1

13.33

1.0079470

1.0079470

Oxygen

O

49.60

4.5

60.00

15.9994300

71.9974350

Sulfur

S

22.09

1

13.33

32.0655000

32.0655000

Calcium

Ca

27.61

1

13.33

40.0784000

40.0784000

Analysis wt%

CaO : 38.64, SO3 : 55.16, H2O : 6.21 (Ref: berechnet)

Strunz 9th edition incl. updates

7.CD.45

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
D:
45:Bassanit-Gruppe

Lapis Classification

VI/C.22-010

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
22: Sehr große Kationen

Classification by Hölzel

7.CE.550

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
C: Sulfates (-Anions +Water)
E: Sulfates, C large

Dana 8th edition

29.06.01.01

29: Hydrated Acid and Sulfates
06: Hydrated Acid and Sulfates where A XO4 · x(H2O)

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, schneeweiß

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.025

Birefringence chart\! Bassanite title=Birefringence chart Bassanite

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

1.559

RI value γ / ε

1.584

Ri mean

1.567

2V angle

Uniaxial (+)

Optical Data Luminescence

Color LW-UV (365nm)

 

violett

Color SW-UV (254nm)

 

violett

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

monoklin

Class (H-M)

2

Space Group number

5

Space Group

I2

Cell parameters a (Å)

12.70

Cell parameters b (Å)

6.83

Cell parameters c (Å)

11.94

Cell parameters a/b or c/a

1.859

Cell parameters c/b

1.748

Cell parameters α

90°

Cell parameters β

90.60

Cell parameters γ

90°

Z

12

Volumne (ų)

1035.631

X-Ray Powder Diffraction

6.01(90),
3.465(80),
3.004(90),
2.802(100),
2.136(50),
2.110(40),
1.849(60),
1.843(80)

XRD chart Bassanite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

2.7

2.793 ( ρ calc. Mineralienatlas )

Instability

+++ H2O => Gips, dehydriert bei ca. 130°C

Preface

Author (Name, Year)

Zambonini, 1910

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 50

Other languages

German

Bassanit

Spanish

Bassanita

English

Bassanite

French

Bassanite

Russian

Бассанит

Simplified Chinese

烧石膏

Alternative Name

English

Hemihydrate

German

Miltonit

Spanish

Miltonita

English

Miltonite

German

Mirupolskit

Spanish

Mirupolskita

English

Mirupolskite

Plaster of Paris

English

PlasterofParis

Polyhydrate

Soluble Anhydrite

Italian

Vibertita

Vibertite

Simplified Chinese

半水石膏

CNMNC symbol

Symbol

Bss

Locations with GPS information