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Johannsenite

Pictures (18 Images total)

Johannsenit mit Rhodonit
Views (File:
1218608870
): 2328
Johannsenit mit Rhodonit
Größe: 45 mm; Fundort: Berg Civillina (Monte Civillina), Recoaro Terme, Vicenza, Venetien (Veneto), Italien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Venetien (Veneto), Region/Vicenza, Provinz/Recoaro Terme/Berg Civillina (Monte Civillina)
Mineral: Johannsenite
Image: 1218608870
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Johannsenit mit Rhodonit

Größe: 45 mm; Fundort: Berg Civillina (Monte Civillina), Recoaro Terme, Vicenza, Venetien (Veneto), Italien
Copyright: Matteo Chinellato
Contribution: Hg 2008-08-13
Locality: Berg Civillina (Monte Civillina) / Recoaro Terme / Vicenza, Provinz / Venetien (Veneto), Region / Italien
Johannsenit
Views (File:
1362340004
): 1160
Johannsenit
Nadelige gelbbraune Kristalle, BB = 3,8 mm, Fundort: Iron Cap Mine, Landsman Camp, Aravaipa District, Graham Co., Arizona, USA.
Copyright: Bebo; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A001502, Donator: Manfred Früchtl
Location: USA/Arizona/Graham Co./Aravaipa District/Landsman Camp/Iron Cap Mine
Mineral: Johannsenite
Image: 1362340004
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Johannsenit (SNr: A001502)

Nadelige gelbbraune Kristalle, BB = 3,8 mm, Fundort: Iron Cap Mine, Landsman Camp, Aravaipa District, Graham Co., Arizona, USA.
Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2013-03-03
Locality: Iron Cap Mine / Landsman Camp / Aravaipa District / Graham Co. / Arizona / USA
Johannsenit
Views (File:
1422382252
): 1174
Johannsenit
Prismatische olivgrüne Kristalle, BB = 4,5 mm, Fundort: Iron Cap Mine, Landsman Camp, Aravaipa District, Graham Co., Arizona, USA.
Copyright: Bebo; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A029260, Donator: Peter Köhlen
Location: USA/Arizona/Graham Co./Aravaipa District/Landsman Camp/Iron Cap Mine
Mineral: Johannsenite
Image: 1422382252
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Johannsenit (SNr: A029260)

Prismatische olivgrüne Kristalle, BB = 4,5 mm, Fundort: Iron Cap Mine, Landsman Camp, Aravaipa District, Graham Co., Arizona, USA.
Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2015-01-27
Locality: Iron Cap Mine / Landsman Camp / Aravaipa District / Graham Co. / Arizona / USA
Manganbabingtonit, Johannsenit
Views (File:
1216335913
): 2326
Manganbabingtonit, Johannsenit
Iron Cap Mine, Graham Co., Arizona, USA
Copyright: Eddy van der Meersche; Contribution: eschuhbauer
Collection: eschuhbauer
Location: USA/Arizona/Graham Co./Aravaipa District/Landsman Camp/Iron Cap Mine
Mineral: Johannsenite, Manganbabingtonite
Image: 1216335913
Rating: 6 (votes: 2)
License: Creative Commons - Attribution (CC-BY) V.3.0
Manganbabingtonit, Johannsenit

Iron Cap Mine, Graham Co., Arizona, USA
Collection: eschuhbauer
Copyright: Eddy van der Meersche
Contribution: eschuhbauer 2008-07-17
Locality: Iron Cap Mine / Landsman Camp / Aravaipa District / Graham Co. / Arizona / USA
Johannsenit
Views (File:
1277386551
): 1752
Johannsenit
Bildbreite: 10 mm, Fundort: Temperino Mine, Campiglia Marittima, Livorno, Toskana, Italien
Copyright: Richard De Nul; Contribution: thdun5
Location: Italien/Toskana (Toscana)/Livorno, Provinz/Campiglia Marittima/Temperino Mine
Mineral: Johannsenite
Image: 1277386551
Rating: 6 (votes: 2)
License: Usage for Mineralienatlas project only
Johannsenit

Bildbreite: 10 mm, Fundort: Temperino Mine, Campiglia Marittima, Livorno, Toskana, Italien
Copyright: Richard De Nul
Contribution: thdun5 2010-06-24
Locality: Temperino Mine / Campiglia Marittima / Livorno, Provinz / Toskana (Toscana) / Italien

You find additional specimen at the Geolitho Museum

Collectors Summary

Color braun, bräunlichschwarz, grünlich, grau, graugrün
Streak color grünlich grau
Solubility +++ heiße HCl
Crystal System monoklin, C2/c

Chemism

Chemical formula

CaMnSi2O6

Chemical composition

Calcium, Mangan, Silicium, Sauerstoff

Unit weight: 247.1840899 u; Number of atoms in the formula: 10

Info

Empirical formula:

CaMnSi2O6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

38.84

6

60.00

15.9994300

95.9965800
Silicon

Si

22.72

2

20.00

28.0855300

56.1710600
Calcium

Ca

16.21

1

10.00

40.0784000

40.0784000
Manganese

Mn

22.23

1

10.00

54.9380499

54.9380499

Analysis wt%

SiO2 : 48.81, Al2O3 : 0.74, Fe2O3 : 0.79, FeO : 1.54, MnO : 22.58, MgO : 2.29, CaO : 21.87, H2O : 0.67 (Ref: American Mineralogist 63)

Strunz 9th edition incl. updates

9.DA.15

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
A: Ketten- und Bandsilikate mit 2 periodischen Ketten SiO6; Pyroxen-Familie
15:Ca Klinopyroxene; Diopsid-Gruppe

Lapis Classification

VIII/F.01-070

VIII: SILIKATE
F: Ketten- und Bandsilikate
1: Zweierketten [Si2O6] 4-; Pyroxen-Gruppe; Klinopyroxene

Classification by Hölzel

9.DB.160

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
B: Diopside-Group

Dana 8th edition

65.01.03a.04

65: Inosilicate Minerals
01: Inosilicates Inosilicate Single-Width Unbranched Chains, W=1 with chains P=2
03a: C2/c clinopyroxenes (Ca clinopyroxenes)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Pyroxene group  ⇒ Clinopyroxene group

Optical Properties

Color

braun, bräunlichschwarz, grünlich, grau, graugrün

Streak color

grünlich grau

Diaphaneity (Transparency)

durchscheinend bis opak

max. Birefringence

0.029
Birefringence chart\! Johannsenite title=Birefringence chart Johannsenite

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

1.710

RI value β

1.720

RI value γ / ε

1.739

Ri mean

1.723

2V angle

Biaxial (+) 69°

Optical Data Luminescence

Color LW-UV (365nm)

  

dunkelorange gelbbraun

LW-UV Intensity

sehr schwach

MW-UV (320nm)

  

nicht fluoreszierend

Color SW-UV (254nm)

  

nicht fluoreszierend

LW-UV Other Colors

  

gelb

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell parameters a (Å)

9.978

Cell parameters b (Å)

9.156

Cell parameters c (Å)

5.293

Cell parameters a/b or c/a

1.090

Cell parameters c/b

0.578

Cell parameters α

90°

Cell parameters β

105.48

Cell parameters γ

90°

Z

4

Volume (ų)

466.019

X-Ray Powder Diffraction

6.60(20),
4.78(20),
3.293(30),
3.012(100),
2.914(20),
2.598(20),
2.566(40),
2.550(30)
XRD chart Johannsenite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.56

3.523 ( ρ calc. Mineralienatlas )

Instability

+++ heiße HCl

(Co-)Type locality

(Co-)Type locality

Italien/Venetien (Veneto), Region/Vicenza, Provinz/Recoaro Terme/Berg Civillina (Monte Civillina)

Italien/Toskana (Toscana)/Livorno, Provinz/Campiglia Marittima/Temperino Mine

Preface

Name from

nach dem Mineralogen und Petrographen Albert Johannsen (1871–1962)

Author (Name, Year)

Schaller, 1932

Danger of confusion

andere Klinopyroxene (Diopsid etc.)

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 385

IMA group assignments

Other languages

German

Johannsenit

Spanish

Johannsenita

English

Johannsenite

French

Johannsenite

Russian

Йохансенит

Japanese

ﾖﾊﾝｾﾝ輝石

CNMNC symbol

Symbol

Jhn

Locations with GPS information

IDs

GUSID (Global unique identifier short form) IklO2nTDg06nXTpbq8Qzag
GUID (Global unique identifier) DA4E4922-C374-4E83-A75D-3A5BABC4336A
Database ID 1802