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Purpurite

Pictures (14 Images total)

Purpurit
Views (File:
1192727593
): 7013
Purpurit
Bildbreite 4 cm; Namibia, Orongo Gebirge, Sandamab Pegmatit
Copyright: thothie; Contribution: thothie
Collection: thothie
Location: Namibia/Erongo, Region/Karibib, Kreis/Usakos/Sandamap North Farm 115/Sandamap (Sandamab)-Pegmatit
Mineral: Purpurite
Image: 1192727593
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Purpurit

Bildbreite 4 cm; Namibia, Orongo Gebirge, Sandamab Pegmatit

Collection: thothie
Copyright: thothie
Contribution: thothie 2007-10-18
Locality: Sandamap (Sandamab)-Pegmatit / Sandamap North Farm 115 / Usakos / Karibib, Kreis / Erongo, Region / Namibia
Purpurit
Views (File:
1309664996
): 4264
Purpurit
Größe: 80x75x40 mm; Fundort: Sandamab-Pegmatit, Usakos, Karibib District, Namibia
Copyright: Michael Roarke; Contribution: slugslayer
Location: Namibia/Erongo, Region/Karibib, Kreis/Usakos/Sandamap North Farm 115/Sandamap (Sandamab)-Pegmatit
Mineral: Purpurite
Image: 1309664996
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Purpurit

Größe: 80x75x40 mm; Fundort: Sandamab-Pegmatit, Usakos, Karibib District, Namibia

Copyright: Michael Roarke
Contribution: slugslayer 2011-07-03
Locality: Sandamap (Sandamab)-Pegmatit / Sandamap North Farm 115 / Usakos / Karibib, Kreis / Erongo, Region / Namibia
Purpurit auf Heterosit
Views (File:
1139766585
): 3965
Purpurit auf Heterosit
Fundort: Sandamab, Usakos, Karibib, Namibia; Größe: 22 x 20 x 13 mm
Copyright: Torben; Contribution: Torben
Location: Namibia/Erongo, Region/Karibib, Kreis/Usakos/Sandamap North Farm 115/Sandamap (Sandamab)-Pegmatit
Mineral: Purpurite
Image: 1139766585
Rating: 7 (votes: 2)
License: Usage for Mineralienatlas project only
Purpurit auf Heterosit

Fundort: Sandamab, Usakos, Karibib, Namibia; Größe: 22 x 20 x 13 mm

Copyright: Torben
Contribution: Torben 2006-02-12
Locality: Sandamap (Sandamab)-Pegmatit / Sandamap North Farm 115 / Usakos / Karibib, Kreis / Erongo, Region / Namibia
Purpurit
Views (File:
1236984825
): 4291
Purpurit
Größe: 87x54x38 mm; Fundort: Pack Rat Mine, San Diego Co., Kalifornien, USA
Copyright: Rob Lavinsky; Contribution: slugslayer
Location: USA/Kalifornien (California)/San Diego Co./Jacumba District/Mt. Tule/Pack Rat Mine
Mineral: Purpurite
Image: 1236984825
Rating: 7 (votes: 2)
License: Usage for Mineralienatlas project only
Purpurit

Größe: 87x54x38 mm; Fundort: Pack Rat Mine, San Diego Co., Kalifornien, USA

Copyright: Rob Lavinsky
Contribution: slugslayer 2009-03-13
Locality: Pack Rat Mine / Mt. Tule / Jacumba District / San Diego Co. / Kalifornien (California) / USA
Purpurit
Views (File:
1309664648
): 3025
Purpurit
Größe: 54x46x19 mm; Fundort: Sandamab-Pegmatit, Usakos, Karibib District, Namibia
Copyright: Rob Lavinsky; Contribution: slugslayer
Location: Namibia/Erongo, Region/Karibib, Kreis/Usakos/Sandamap North Farm 115/Sandamap (Sandamab)-Pegmatit
Mineral: Purpurite
Image: 1309664648
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Purpurit

Größe: 54x46x19 mm; Fundort: Sandamab-Pegmatit, Usakos, Karibib District, Namibia

Copyright: Rob Lavinsky
Contribution: slugslayer 2011-07-03
Locality: Sandamap (Sandamab)-Pegmatit / Sandamap North Farm 115 / Usakos / Karibib, Kreis / Erongo, Region / Namibia
Purpurit
Views (File:
1335379480
): 1879
Purpurit
Sandamab-Pegmatit, Usakos, Karibib, Erongo, Namibia, 60x58x20 mm
Copyright: Embarak; Contribution: Embarak
Collection: Embarak
Location: Namibia/Erongo, Region/Karibib, Kreis/Usakos/Sandamap North Farm 115/Sandamap (Sandamab)-Pegmatit
Mineral: Purpurite
Image: 1335379480
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Purpurit

Sandamab-Pegmatit, Usakos, Karibib, Erongo, Namibia, 60x58x20 mm

Collection: Embarak
Copyright: Embarak
Contribution: Embarak 2012-04-25
Locality: Sandamap (Sandamab)-Pegmatit / Sandamap North Farm 115 / Usakos / Karibib, Kreis / Erongo, Region / Namibia

You find additional specimen at the Geolitho Museum

Collectors Summary

Color tiefrot, dunkelrot bis dunkelviolett, tiefrosa, braunschwarz
Streak color rot, rotbraun oder purpurrosa
Lustre Matt bis leichter Metallglanz
Hardness (Mohs) 4 - 4.5
Solubility +++ HCl
Crystal System orthorhombisch, Pmnb
Morphology Kristallformen bisher unbekannt, körnige und dichte Aggregate

Additional information / Summary

Chemism

Chemical formula

Mn3+(PO4)

Chemical composition

Mangan, Phosphor, Sauerstoff

Unit weight: 149.9095311 u; Number of atoms in the formula: 6

Info

Empirical formula:

Mn(PO4)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

42.69

4

66.67

15.9994300

63.9977200

Phosphorus

P

20.66

1

16.67

30.9737612

30.9737612

Manganese

Mn

36.65

1

16.67

54.9380499

54.9380499

Analysis wt%

Na2O : 0.84, CaO : 1.48, Mn2O3 : 29.25, Fe2O3 : 15.89, P2O5 : 47.30, H2O : 5.26 (Ref: Dana, 7th ed. 2)

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.02-060

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.210

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

Dana 8th edition

38.04.01.02

38: Anhydrous Phosphates, etc
04: Anhydrous Phosphates, etc A+ XO4

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Triphylite group

Optical Properties

Color

tiefrot, dunkelrot bis dunkelviolett, tiefrosa, braunschwarz

Streak color

rot, rotbraun oder purpurrosa

Diaphaneity (Transparency)

durchscheinend, opak

Lustre

Matt bis leichter Metallglanz

max. Birefringence

0.07

Birefringence chart\! Purpurite title=Birefringence chart Purpurite

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

1.85

RI value β

1.86

RI value γ / ε

1.92

Ri mean

1.877

2V angle

Biaxial (+) 38°~

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pmnb

Cell parameters a (Å)

5.83

Cell parameters b (Å)

9.70

Cell parameters c (Å)

4.77

Cell parameters a/b or c/a

0.601

Cell parameters c/b

0.492

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

269.748

X-Ray Powder Diffraction

4.883(70),
4.293(100),
3.740(20),
3.455(60),
2.946(30),
2.912(60),
2.442(70),
2.410(30)

XRD chart Purpurite

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

Morphology

Kristallformen bisher unbekannt, körnige und dichte Aggregate

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4 - 4.5

VHN (Hardness Vickers)

230 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.4

3.691 ( ρ calc. Mineralienatlas )

Radioactivity

-

Instability

+++ HCl

Chemical Properties and Tests

Unterscheidung in der Farbe und chemisch.
Chemische Eigenschaften: schmilzt leicht, löslich in HCl.
Behandlung: dunkle Überzüge mit verdünnten Säuren (ausgenommen HCl) entfernen.

(Co-)Type locality

(Co-)Type locality

USA/North Carolina/Gaston Co./Kings Mt./Faires Mine

Preface

Occurrences

sekundär in Pegmatiten, Phosphatpegmatiten

Associations

Sicklerit, Triphylin, Karibibit u.a.

Rareness

selten

Name from

dem lateinischen purpureus - purpurrot

Author (Name, Year)

Graton & Schaller, 1905

Relevance, Usage

gelegentlich zur Verwendung als Edelstein (Cabochon)

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 479

CNMNC Newsletter No. 50; Mineralogical Magazine, 31 [Formel]

IMA group assignments

Other languages

German

Purpurit

Spanish

Purpurita

English

Purpurite

French

Purpurite

Russian

Пурпурит

Japanese

紫石

Alternative Name

Manganipurpurite

Na-purpurite

CNMNC symbol

Symbol

Pur

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 1Empm-zO7EeEloiLdq-xRQ
GUID (Global unique identifier) 9BA949D4-CEEC-47EC-8496-888B76AFB145
Database ID 3157