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Sicklerite (Sicklerit)

Pictures (1 Images total)

Brauner Sicklerit mit blauem Phosphosiderit
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1604566240
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Brauner Sicklerit mit blauem Phosphosiderit
Belegstück; BB ca. 3mm.
Copyright: prospector56; Contribution: prospector56
Collection: Lithothek der Münchener Micromounter, Collection number: A047263, Donator: Bluth Joachim
Location: Namibia/Erongo, Region/Karibib, Kreis/Farm Okongava-Ost
Mineral: Sicklerite
Image: 1604566240
License: Usage for Mineralienatlas project only
Brauner Sicklerit mit blauem Phosphosiderit (SNr: A047263)

Belegstück; BB ca. 3mm.
Collection: Lithothek der Münchener Micromounter
Copyright: prospector56
Contribution: prospector56 2020-11-05
Locality: Farm Okongava-Ost / Karibib, Kreis / Erongo, Region / Namibia

You find additional specimen at the Geolitho Museum

Collectors Summary

Color dunkelbraun
Streak color hellgelb
Hardness (Mohs) 4
Solubility ++ Säuren
Crystal System orthorhombisch, Pmnb

Chemism

Chemical formula

Li(Mn2+,Fe3+)PO4

Chemical composition

Eisen, Lithium, Mangan, Phosphor, Sauerstoff

Unit weight: 157.077518625 u; Number of atoms in the formula: 7

Info

Empirical formula:

Li(Mn0.75Fe0.25)PO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Lithium

Li

4.42

1

14.29

6.9412000

6.9412000
Oxygen

O

40.74

4

57.14

15.9994300

63.9977200
Phosphorus

P

19.72

1

14.29

30.9737612

30.9737612
Manganese

Mn

26.23

0.75

10.71

54.9380499

41.2035374
Iron

Fe

8.89

0.25

3.57

55.8452000

13.9613000

Strunz 9th edition incl. updates

8.AB.10

8: Phosphate, Arsenate, Vanadate
A: Phosphate, etc., ohne weitere Anionen, ohne H2O
B: Mit mittelgroßen [Kationen]
10:Triphylin-Gruppe

Lapis Classification

VII/A.02-040

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
A: Wasserfreie Phosphate [PO4] 3-, ohne fremde Anionen
2: Mittelgroße Kationen: Fe-Mn vorwiegend

Classification by Hölzel

8.AB.120

8: PHOSPHATES ARSENATES VANADATES
A: Phosphates (-anions -water)
B: Phosphates, C medium Triphylite-Group
1: Triphylite-Group

Dana 8th edition

38.01.04.02

38: Anhydrous Phosphates, etc
01: Anhydrous Phosphates, etc A+ B++ XO4

IMA status

CNMNC Newsletter 70 (2022) diskreditiert (4) Nomenclature/classification proposals approved in October 2022 Triphylite group

Mineral status

diskreditiert

Optical Properties

Color

dunkelbraun

Streak color

hellgelb

max. Birefringence

0.030
Birefringence chart\! Sicklerite title=Birefringence chart Sicklerite

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

1.715

RI value β

1.735

RI value γ / ε

1.745

Ri mean

1.732

2V angle

Biaxial (-) 60°!

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pmnb

Cell parameters a (Å)

4.765

Cell parameters b (Å)

10.338

Cell parameters c (Å)

6.060

Cell parameters a/b or c/a

0.461

Cell parameters c/b

0.586

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

298.519

X-Ray Powder Diffraction

5.17(50),
4.32(90),
3.92(60),
3.51(90),
3.013(100),
2.531(100),
1.755(60),
1.632(60)
XRD chart Sicklerite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.45 (gemessen)

3.495 ( ρ calc. Mineralienatlas )

Instability

++ Säuren

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/San Diego County/Pala District/Tourmaline Queen Mountain/Stewart Mine (MS 6162; Stewart Lithia mine)

Preface

Author (Name, Year)

Schaller, 1912

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 541

CNMNC Newsletter 70, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-591-2022, 2022.

Other languages

German

Sicklerit

Spanish

Sicklerita

English

Sicklerite

French

Sicklerite

Russian

Сиклерит

Simplified Chinese

磷锂锰矿

Alternative Name

Mangansicklerite

Mn-Sicklerite

French

Pseudohétérosite

Simplified Chinese

锰磷锂锰矿

CNMNC symbol

Symbol

Sik

Locations with GPS information

IDs

GUSID (Global unique identifier short form) svVv5Bt94UaSmtHZke282Q
GUID (Global unique identifier) E46FF5B2-7D1B-46E1-929A-D1D991EDBCD9
Database ID 3513