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Paulkerrite (Paulkerrit)

Pictures (2 Images total)

Paulkerrit
Views (File:
1271787156
): 1054
Paulkerrit
Bildbreite: 2 mm, Fundort: Steinbruch Folgosinho, Gouveia, Portugal
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Portugal/Guarda, Distrikt/Gouveia/Folgosinho/Steinbruch Folgosinho (Sítio do Castelo Mine)
Mineral: Paulkerrite
Image: 1271787156
Rating: 5.5 (votes: 2)
License: Usage for Mineralienatlas project only
Paulkerrit

Bildbreite: 2 mm, Fundort: Steinbruch Folgosinho, Gouveia, Portugal
Copyright: Luigi Chiappino
Contribution: thdun5 2010-04-20
Locality: Steinbruch Folgosinho (Sítio do Castelo Mine) / Folgosinho / Gouveia / Guarda, Distrikt / Portugal
Paulkerrit
Views (File:
1347953612
): 1733
Paulkerrit
bräunlicher Paulkerrit auf blauem Phosphosiderit. Fundort Pegmatitgrube Wildenau-Plößberg/Oberpfalz. Bildbreite 2mm
Copyright: berthold; Contribution: berthold
Collection: Lehner-Sammlung, Museum Pleystein
Location: Deutschland/Bayern/Oberpfalz, Bezirk/Tirschenreuth, Landkreis/Plößberg/Plößberger Pegmatit
Mineral: Paulkerrite, Phosphosiderite
Image: 1347953612
Rating: 6 (votes: 2)
License: Usage for Mineralienatlas project only
Paulkerrit

bräunlicher Paulkerrit auf blauem Phosphosiderit. Fundort Pegmatitgrube Wildenau-Plößberg/Oberpfalz. Bildbreite 2mm
Collection: Lehner-Sammlung, Museum Pleystein
Copyright: berthold
Contribution: berthold 2012-09-18
Locality: Plößberger Pegmatit / Plößberg / Tirschenreuth, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland

Collectors Summary

Color gelbbraun
Streak color gelblichweiß
Hardness (Mohs) 3
Crystal System orthorhombisch, Pbca

Chemism

Chemical formula

(H2O,K)2(Mg,Mn2+)2(Fe3+,Al)2Ti(PO4)4(O,F)2·14H2O

Chemical composition

Aluminium, Eisen, Magnesium, Mangan, Titan, Fluor, Kalium, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 921.223232475 u; Number of atoms in the formula: 74

Info

Empirical formula:

((H2O)0.75K0.25)2(Mg0.75Mn0.25)2(Fe0.75Al0.25)2Ti(PO4)4(O0.75F0.25)2·14H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

3.39

31

41.89

1.0079470

31.2463570
Oxygen

O

57.31

33

44.59

15.9994300

527.9811900
Fluorine

F

1.03

0.5

0.68

18.9984033

9.4992016
Magnesium

Mg

3.96

1.5

2.03

24.3050600

36.4575900
Aluminium

Al

1.46

0.5

0.68

26.9815382

13.4907691
Phosphorus

P

13.45

4

5.41

30.9737612

123.8950448
Potassium

K

2.12

0.5

0.68

39.0983100

19.5491550
Titanium

Ti

5.20

1

1.35

47.8671000

47.8671000
Manganese

Mn

2.98

0.5

0.68

54.9380499

27.4690250
Iron

Fe

9.09

1.5

2.03

55.8452000

83.7678000

Strunz 9th edition incl. updates

8.DH.35

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
H: Mit großen und mittelgroßen [Kationen], (OH, etc.):RO4 < 1:1
35:

Lapis Classification

VII/D.33-030

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
33: Mittelgroße und sehr große Kationen: Al-Mg und Ca-Na-K

Classification by Hölzel

8.DI.140

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
I: C large, V=1(2) - C small-medium, V=2,3,4
1: C small-medium, V=2 and 3,4 Paulkerrite-Group

Dana 8th edition

42.11.21.01

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
11: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (AB)4 (XO4)3 Zq · x(H2O)
21: Paulkerrite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelbbraun

Streak color

gelblichweiß

max. Birefringence

0.045
Birefringence chart\! Paulkerrite title=Birefringence chart Paulkerrite

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

1.598

RI value β

1.624

RI value γ / ε

1.643

Ri mean

1.622

2V angle

Biaxial (-) 80°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

61

Space Group

Pbca

Cell parameters a (Å)

10.49

Cell parameters b (Å)

20.75

Cell parameters c (Å)

12.44

Cell parameters a/b or c/a

0.506

Cell parameters c/b

0.600

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

2707.784

X-Ray Powder Diffraction

10.3(90),
7.46(80),
6.20(100),
5.22(20),
3.95(30),
3.75(40),
3.13(70),
2.872(40)
XRD chart Paulkerrite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.36 (gemessen)

2.26 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

USA/Arizona/Yavapai Co./Eureka District/Hillside/Bagdad Mine Area/7U7 Ranch

Preface

Rareness

sehr selten

Name from

Paul Francis Kerr (* 12. Februar 1897 in Hemet, Kalifornien; † 27. Februar 1981), US-amerikanischer Mineraloge.

Author (Name, Year)

Peacor & Dunn & Simmons, 1984

References

  • Mineralogical Record 15 (1984), 303
  • DILL, H.G., WEBER, B. (2009) Ein neuer Fund von Paulkerrit im Pegmatit von Plößberg/Oberpfalz. Geol. Bl. NO-Bayern 59: S. 91-98

Other languages

German

Paulkerrit

Spanish

Paulkerrita

English

Paulkerrite

French

Paulkerrite

Russian

Полкеррит

CNMNC (IMA)-Number

IMA 1983-014

CNMNC symbol

Symbol

Pke

Locations with GPS information