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Whiteite-(MnFeMg) (Whiteit-(MnFeMg))

Pictures (4 Images total)

Whiteit-(MnFeMg)
Views (File:
1219587580
): 839
Whiteit-(MnFeMg)
Bildbreite: 2 mm; Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried; Contribution: Hg
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Whiteite-(MnFeMg)
Image: 1219587580
Rating: 7.67 (votes: 3)
License: Usage for Mineralienatlas project only
Whiteit-(MnFeMg)

Bildbreite: 2 mm; Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA

Copyright: Stephan Wolfsried
Contribution: Hg 2008-08-24
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA
Whiteit-(MnFeMg)
Views (File:
1166605448
): 843
Whiteit-(MnFeMg)
Bildbreite: 3 mm; Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried; Contribution: Hg
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Whiteite-(MnFeMg)
Image: 1166605448
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Whiteit-(MnFeMg)

Bildbreite: 3 mm; Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA

Copyright: Stephan Wolfsried
Contribution: Hg 2006-12-20
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA
Whiteit-(MnFeMg)
Views (File:
1219587524
): 729
Whiteit-(MnFeMg)
Bildbreite: 2 mm; Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried; Contribution: Hg
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Whiteite-(MnFeMg)
Image: 1219587524
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Whiteit-(MnFeMg)

Bildbreite: 2 mm; Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA

Copyright: Stephan Wolfsried
Contribution: Hg 2008-08-24
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA
Whiteit-(MnFeMg)
Views (File:
1219587471
): 744
Whiteit-(MnFeMg)
Bildbreite: 2 mm; Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA
Copyright: Stephan Wolfsried; Contribution: Hg
Location: USA/North Carolina/Cleveland Co./Kings Mountain District/Foote Mine (Foote Lithium Co. Mine)
Mineral: Whiteite-(MnFeMg)
Image: 1219587471
Rating: 6.5 (votes: 2)
License: Usage for Mineralienatlas project only
Whiteit-(MnFeMg)

Bildbreite: 2 mm; Fundort: Foote Mine, Kings Mountain District, Cleveland Co., North Carolina, USA

Copyright: Stephan Wolfsried
Contribution: Hg 2008-08-24
Locality: Foote Mine (Foote Lithium Co. Mine) / Kings Mountain District / Cleveland Co. / North Carolina / USA

Collectors Summary

Color schokoladenbraun
Streak color bräunlich-weiß
Hardness (Mohs) 3.5
Solubility +++ Säuren
Crystal System monoklin, P2/a

Chemism

Chemical formula

(Mn2+,Ca)(Fe2+,Mn2+)Mg2Al2(PO4)4(OH)2·8H2O

Chemical composition

Aluminium, Calcium, Eisen, Magnesium, Mangan, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 767.4380171 u; Number of atoms in the formula: 54

Info

Empirical formula:

(Mn0.75Ca0.25)(Fe0.75Mn0.25)Mg2Al2(PO4)4(OH)2·8H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.36

18

33.33

1.0079470

18.1430460

Oxygen

O

54.20

26

48.15

15.9994300

415.9851800

Magnesium

Mg

6.33

2

3.70

24.3050600

48.6101200

Aluminium

Al

7.03

2

3.70

26.9815382

53.9630764

Phosphorus

P

16.14

4

7.41

30.9737612

123.8950448

Calcium

Ca

1.31

0.25

0.46

40.0784000

10.0196000

Manganese

Mn

7.16

1

1.85

54.9380499

54.9380499

Iron

Fe

5.46

0.75

1.39

55.8452000

41.8839000

Strunz 9th edition incl. updates

8.DH.15

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

Lapis Classification

VII/D.29-030

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

Classification by Hölzel

8.DL.210

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
L: very large=2, very small-medium=2+3
2: Whiteite-Jahnsite-Group

Dana 8th edition

42.11.03.02

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

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Jahnsite group  ⇒ Whiteite subgroup

Optical Properties

Color

schokoladenbraun

Streak color

bräunlich-weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.020

Birefringence chart\! Whiteite-(MnFeMg) title=Birefringence chart Whiteite-(MnFeMg)

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

1.575

RI value β

1.585

RI value γ / ε

1.595

Ri mean

1.585

2V angle

Biaxial (-) 85°~

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

13

Space Group

P2/a

Cell parameters a (Å)

14.99

Cell parameters b (Å)

6.96

Cell parameters c (Å)

10.14

Cell parameters a/b or c/a

2.154

Cell parameters c/b

1.457

Cell parameters α

90°

Cell parameters β

113.32

Cell parameters γ

90°

Z

2

Volumne (ų)

971.488

X-Ray Powder Diffraction

9.318(100),
5.598(30),
4.824(50),
4.644(40),
3.518(30),
3.245(30),
2.948(40),
2.776(90)

XRD chart Whiteite-(MnFeMg)

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.63 - 2.67 / Durchschnittlich = 2.65

2.623 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

Preface

Author (Name, Year)

Moore & Ito, 1978

References

Mineralogical Magazine 43 (1979), 227

IMA group assignments

Other languages

German

Whiteit-(MnFeMg)

French

Whiteite-(MnFeMg)

English

Whiteite-(MnFeMg)

Spanish

Whiteíta-(MnFeMg)

Russian

Уайтит-(MnFeMg)

CNMNC (IMA)-Number

IMA 1978-A

CNMNC symbol

Symbol

Wt-MnFeMg

Locations with GPS information