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Orthoericssonite (Orthoericssonit)

Collectors Summary

Color rötlichschwarz
Streak color braun
Hardness (Mohs) 4.5
Cleavages vollkommen
Crystal System orthorhombisch, Pnmn

Chemism

Chemical formula

BaMn2(Fe3+O)Si2O7(OH)

Chemical composition

Barium, Eisen, Mangan, Silicium, Sauerstoff, Wasserstoff

Unit weight: 504.2228768 u; Number of atoms in the formula: 16

Info

Empirical formula:

BaMn2(FeO)Si2O7(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.20

1

6.25

1.0079470

1.0079470

Oxygen

O

28.56

9

56.25

15.9994300

143.9948700

Silicon

Si

11.14

2

12.50

28.0855300

56.1710600

Manganese

Mn

21.79

2

12.50

54.9380499

109.8760998

Iron

Fe

11.08

1

6.25

55.8452000

55.8452000

Barium

Ba

27.24

1

6.25

137.3277000

137.3277000

Strunz 9th edition incl. updates

9.BE.25

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination
25:Lamprophyllit-Gruppe

Dana 8th edition

56.02.06c.05

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
02: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with cations in [4] and/or >[4] coordination
06c: Seidozerite - Lamprophyllite group (Lamprophyllite subgroup)

IMA status

Diskreditiert von der CNMNC, da das orthorhomb. Polytyp (-2O) zum monoklinen Ericssonit (IMA 10-F, nach Lapis 5/2011, S. 58)

Mineral status

Polytype

Optical Properties

Color

rötlichschwarz

Streak color

braun

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

58

Space Group

Pnmn

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

X-Ray Powder Diffraction

5.075(60),
3.610(20),
3.383(100),
2.942(10),
2.816(10),
2.683(20),
2.536(30),
2.031(10)

XRD chart Orthoericssonite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.5

Density (g/cm³)

4.21 (gemessen)

Cleavages

vollkommen

Preface

Author (Name, Year)

Moore, 1971

References

Lithos 4 (1971), 137

Other languages

German

Orthoericssonit

English

Orthoericssonite

French

Orthoericssonite

Spanish

Ortoericssonita

Russian

Ортоэрикссонит

Japanese

斜方エリクソン石

Alternative Name

Spanish

Orthoericssonita

CNMNC (IMA)-Number

IMA 1970-005

Locations with GPS information