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Graftonite (Graftonit)

Pictures (3 Images total)

Graftonit-Triphyllit-Mischkristall
Views (File:
1262476458
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Graftonit-Triphyllit-Mischkristall
Größe: 45x35x30 mm; Fundort: Groton, Grafton Co., New Hampshire, USA
Copyright: Peter Haas; Contribution: slugslayer
Location: USA/New Hampshire/Grafton Co./Groton
Mineral: Graftonite, Triphylite
Image: 1262476458
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Graftonit-Triphyllit-Mischkristall

Größe: 45x35x30 mm; Fundort: Groton, Grafton Co., New Hampshire, USA
Copyright: Peter Haas
Contribution: slugslayer 2010-01-03
Locality: Groton / Grafton Co. / New Hampshire / USA
Graftonit
Views (File:
1360927759
): 1088
Graftonit
Lachsrosa Graftonit. Fundort: Spatgrube Cornelia, Hagendorf-Süd, Oberpfalz, Bayern, Deutschland. Breite des Einschlusses: ca. 3 mm.
Copyright: raritätenjäger; Contribution: raritätenjäger
Collection: raritätenjäger
Location: Deutschland/Bayern/Oberpfalz, Bezirk/Neustadt an der Waldnaab, Landkreis/Waidhaus/Hagendorf/Hagendorf-Süd (Grube Cornelia)
Mineral: Graftonite
Image: 1360927759
Rating: 5 (votes: 1)
License: Usage for Mineralienatlas project only
Graftonit

Lachsrosa Graftonit. Fundort: Spatgrube Cornelia, Hagendorf-Süd, Oberpfalz, Bayern, Deutschland. Breite des Einschlusses: ca. 3 mm.
Collection: raritätenjäger
Copyright: raritätenjäger
Contribution: raritätenjäger 2013-02-15
Locality: Hagendorf-Süd (Grube Cornelia) / Hagendorf / Waidhaus / Neustadt an der Waldnaab, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland
Sarkopsid (braun) mit Graftonit (lachsrosa)
Views (File:
1412437129
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Sarkopsid (braun) mit Graftonit (lachsrosa)
Hagendorf-Süd/Oberpfalz,Bayern; Größe 5x4 cm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Deutschland/Bayern/Oberpfalz, Bezirk/Neustadt an der Waldnaab, Landkreis/Waidhaus/Hagendorf/Hagendorf-Süd (Grube Cornelia)
Mineral: Graftonite, Sarcopside
Image: 1412437129
License: Usage for Mineralienatlas project only
Sarkopsid (braun) mit Graftonit (lachsrosa)

Hagendorf-Süd/Oberpfalz,Bayern; Größe 5x4 cm
Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2014-10-04
Locality: Hagendorf-Süd (Grube Cornelia) / Hagendorf / Waidhaus / Neustadt an der Waldnaab, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland

Collectors Summary

Color braun, rosa, dunkelbraun, rötlichbraun
Streak color blass rosa
Hardness (Mohs) 5
Solubility +++ Säuren
Crystal System monoklin, P21/c

Chemism

Chemical formula

Fe2+Fe2+2(PO4)2

Chemical composition

Eisen, Phosphor, Sauerstoff

Unit weight: 357.4785624 u; Number of atoms in the formula: 13

Info

Empirical formula:

FeFe2(PO4)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

35.81

8

61.54

15.9994300

127.9954400
Phosphorus

P

17.33

2

15.38

30.9737612

61.9475224
Iron

Fe

46.87

3

23.08

55.8452000

167.5356000

Analysis wt%

CaO : 6.00, FeO : 30.70, MnO : 21.81, P2O5 : 39.66, H2O : 0.60 (Ref: American Mineralogist 50)

Strunz 9th edition incl. updates

8.AB.20

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

Lapis Classification

VII/A.04-020

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

Classification by Hölzel

8.AB.300

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

Dana 8th edition

38.03.03.01

38: Anhydrous Phosphates, etc
03: Anhydrous Phosphates, etc (A+ B++)3 (XO4)2

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Graftonite group

Optical Properties

Color

braun, rosa, dunkelbraun, rötlichbraun

Streak color

blass rosa

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.027
Birefringence chart\! Graftonite title=Birefringence chart Graftonite

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

1.709

RI value β

1.714

RI value γ / ε

1.736

Ri mean

1.720

2V angle

Biaxial (+) 50°!

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

8.87

Cell parameters b (Å)

11.57

Cell parameters c (Å)

6.17

Cell parameters a/b or c/a

0.767

Cell parameters c/b

0.533

Cell parameters α

90°

Cell parameters β

99.20

Cell parameters γ

90°

Z

4

Volumne (ų)

625.056

X-Ray Powder Diffraction

3.429(100),
3.033(50),
2.915(30),
2.845(60),
2.839(30),
2.794(30),
2.731(70),
2.420(30)
XRD chart Graftonite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.67 - 3.7 / Durchschnittlich = 3.68

3.799 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

USA/New Hampshire/Grafton Co./Grafton/Melvin Mt.

Preface

Author (Name, Year)

Penfield, 1900

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 225

Neudefinition -IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) NEWSLETTER 36; Mineralogical Magazine, April 2017, Vol. 81(2), pp. 403–409 [Neue Formel]

IMA group assignments

 
Graftonite group
 
 
 

 
 
Beusite
Mn2+Mn2+2(PO4)2
monoklin
P21/c

 
 
Beusite-(Ca)
CaMn2(PO4)2
monoklin
P21/c

 
 
Graftonite
Fe2+Fe2+2(PO4)2
monoklin
P21/c

 
 
Graftonite-(Ca)
CaFe2(PO4)2
monoklin
P21/c

 
 
Graftonite-(Mn)
MnFe2(PO4)2
monoklin
P21/c

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Actuality: 26. Mar 2023 - 17:00:24

Other languages

German

Graftonit

Spanish

Graftonita

French

Graftonite

English

Graftonite

Russian

Графтонит

Simplified Chinese

磷锰铁矿

Alternative Name

Repossite

CNMNC symbol

Symbol

Gft

Locations with GPS information