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Dorfmanite

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Dorfmanit
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Dorfmanit
weiße Krusten von Dorfmanit auf Ussingit, Lovozero, Kola, Russland; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero
Mineral: Dorfmanite
Image: 1581279837
License: Usage for Mineralienatlas project only
Dorfmanit

weiße Krusten von Dorfmanit auf Ussingit, Lovozero, Kola, Russland; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-02-09
Locality: Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 1.25
Solubility +++ H2O, stabil bei 25 - 61% relative Luftfeuchte und 25°C
Crystal System orthorhombisch, Pbca

Chemism

Chemical formula

Na2HPO4·2H2O

Chemical composition

Natrium, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 177.9896166 u; Number of atoms in the formula: 14

Info

Empirical formula:

Na2HPO4·2H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.83

5

35.71

1.0079470

5.0397350
Oxygen

O

53.93

6

42.86

15.9994300

95.9965800
Sodium

Na

25.83

2

14.29

22.9897702

45.9795404
Phosphorus

P

17.40

1

7.14

30.9737612

30.9737612

Analysis wt%

Na2O : 34.84, P2O5 : 39.49, H2O : 25.44 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 80)

Strunz 9th edition incl. updates

8.CJ.60

8: Phosphate, Arsenate, Vanadate
C: Phosphate ohne weitere Anionen, mit H2O
J: Ausschließlich mit großen Kationen
60:Dorfmanit-Gruppe

Lapis Classification

VII/C.22-010

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
C: Wasserhaltige Phosphate, ohne fremde Anionen
22: Mittelgroße und große Kationen: Fe-Mn-Zn-Mg und Ca-(NH4) 1+

Classification by Hölzel

8.CF.100

8: PHOSPHATES ARSENATES VANADATES
C: Phosphates (-Anions +Water)
F: Phosphates, C large, V: 1 to 4
1: Valency: 1 Dorfmanite-Group

Dana 8th edition

39.01.08.01

39: Hydrated Acid Phosphates, etc
01: Hydrated Acid Phosphates, etc A+ [HXO4] · x(H2O)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.017
Birefringence chart\! Dorfmanite title=Birefringence chart Dorfmanite

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

1.454

RI value β

1.461

RI value γ / ε

1.471

Ri mean

1.462

2V angle

Biaxial (+) 65°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

61

Space Group

Pbca

Cell parameters a (Å)

10.30

Cell parameters b (Å)

16.92

Cell parameters c (Å)

6.54

Cell parameters a/b or c/a

0.609

Cell parameters c/b

0.387

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volume (ų)

1139.765

X-Ray Powder Diffraction

5.28(60),
4.64(70),
3.35(100),
3.25(80),
2.928(60),
2.869(70),
2.738(60),
2.260(70)
XRD chart Dorfmanite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

1.25

VHN (Hardness Vickers)

14 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2

2.074 ( ρ calc. Mineralienatlas )

Instability

+++ H2O, stabil bei 25 - 61% relative Luftfeuchte und 25°C

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Berg Koashva/Koashva Grube

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Yukspor/Material'naya-Stollen

Preface

Author (Name, Year)

Kapustin & Pudovkina & Bykova, 1980

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 109 (1980), 211

Other languages

German

Dorfmanit

Spanish

Dorfmanita

French

Dorfmanite

English

Dorfmanite

Russian

Дорфманит

CNMNC (IMA)-Number

IMA 1979-053

CNMNC symbol

Symbol

Dfm

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 3oIuXh4Bt0uJe_PSs1qfyQ
GUID (Global unique identifier) 5E2E82DE-011E-4BB7-897B-F3D2B35A9FC9
Database ID 960