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Hydrokenoralstonite

Pictures (17 Images total)

Ralstonit-Oktaeder
Views (File:
1250026837
): 8863
Ralstonit-Oktaeder
Bildbreite: 2,5 mm; Fundort: Kryolithlagerstätte, Ivigtut, Kitaa, Grönland
Copyright: Joachim Esche; Contribution: Philip Blümner
Location: Grönland/Kommuneqarfik Sermersooq/Ivittuut (Ivigtut)/Kryolithlagerstätte (Cryolite deposit)
Mineral: Hydrokenoralstonite
Encyclopedia: Oktaeder
Image: 1250026837
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Ralstonit-Oktaeder

Bildbreite: 2,5 mm; Fundort: Kryolithlagerstätte, Ivigtut, Kitaa, Grönland
Copyright: Joachim Esche
Contribution: Philip Blümner 2009-08-11
Locality: Kryolithlagerstätte (Cryolite deposit) / Ivittuut (Ivigtut) / Kommuneqarfik Sermersooq / Grönland
Ralstonit
Views (File:
1391543719
): 1336
Ralstonit
Oktaedrische farblose Kristalle, BB = 4,2 mm, Fundort: Arsuk Fjord, Ivittuut (Ivigtut), Kommuneqarfik Sermersooq, Grönland.
Copyright: Bebo; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A013138, Donator: Melanie Albert
Location: Grönland/Kommuneqarfik Sermersooq/Ivittuut (Ivigtut)/Arsuk Fjord
Mineral: Hydrokenoralstonite
Image: 1391543719
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Ralstonit (SNr: A013138)

Oktaedrische farblose Kristalle, BB = 4,2 mm, Fundort: Arsuk Fjord, Ivittuut (Ivigtut), Kommuneqarfik Sermersooq, Grönland.
Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2014-02-04
Locality: Arsuk Fjord / Ivittuut (Ivigtut) / Kommuneqarfik Sermersooq / Grönland
Ralstonit
Views (File:
1287255134
): 1561
Ralstonit
Kristallgröße: 0,5 mm; Fundort: Kryolithlagerstätte, Ivigtut, Kitaa, Kommuneqarfik Sermersooq, Grönland
Copyright: Luigi Mattei; Contribution: Philip Blümner
Location: Grönland/Kommuneqarfik Sermersooq/Ivittuut (Ivigtut)/Kryolithlagerstätte (Cryolite deposit)
Mineral: Hydrokenoralstonite
Image: 1287255134
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Ralstonit

Kristallgröße: 0,5 mm; Fundort: Kryolithlagerstätte, Ivigtut, Kitaa, Kommuneqarfik Sermersooq, Grönland
Copyright: Luigi Mattei
Contribution: Philip Blümner 2010-10-16
Locality: Kryolithlagerstätte (Cryolite deposit) / Ivittuut (Ivigtut) / Kommuneqarfik Sermersooq / Grönland
Ralstonit
Views (File:
1422267576
): 793
Ralstonit
Bildbreite: 4 mm: Fundort: Kryolithlagerstätte, Ivigtut, Kitaa, Kommuneqarfik Sermersooq, Grönland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Grönland/Kommuneqarfik Sermersooq/Ivittuut (Ivigtut)/Kryolithlagerstätte (Cryolite deposit)
Mineral: Hydrokenoralstonite
Image: 1422267576
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Ralstonit

Bildbreite: 4 mm: Fundort: Kryolithlagerstätte, Ivigtut, Kitaa, Kommuneqarfik Sermersooq, Grönland
Copyright: Stephan Wolfsried
Contribution: Hg 2015-01-26
Locality: Kryolithlagerstätte (Cryolite deposit) / Ivittuut (Ivigtut) / Kommuneqarfik Sermersooq / Grönland
Hydrokenoralstonit
Views (File:
1512122770
): 357
Hydrokenoralstonit
Hydrokenoralstonit in hexaedrische, weißen Kristallen neben blättrigem, braunem Kupletskit aus Gjerdingen in Norwegen. Bildhöhe etwa 4 mm.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: Gj-HyRa-2-1-1
Location: Norwegen/Akershus, Provinz/Lunner, Kommune/Nordmarka/Gjerdingen
Mineral: Hydrokenoralstonite, Kupletskite
Image: 1512122770
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Hydrokenoralstonit (SNr: Gj-HyRa-2-1-1)

Hydrokenoralstonit in hexaedrische, weißen Kristallen neben blättrigem, braunem Kupletskit aus Gjerdingen in Norwegen. Bildhöhe etwa 4 mm.
Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2017-12-01
Locality: Gjerdingen / Nordmarka / Lunner, Kommune / Akershus, Provinz / Norwegen

You find additional specimen at the Geolitho Museum

Collectors Summary

Color farblos, weiß
Streak color weiß
Hardness (Mohs) 4.5
Solubility +++ H2SO4
Crystal System kubisch, Fd3m

Additional information / Summary

Umbenannt von Ralstonit zu Hydrokenoralstonit nach der Eingliederung in die Pyrochlor-Supergruppe im Juli 2016.

Chemism

Chemical formula

NaxMgxAl2-x(F,OH)6·H2O

Chemical composition

Aluminium, Magnesium, Natrium, Fluor, Sauerstoff, Wasserstoff

Strunz 9th edition incl. updates

3.CF.05

3: Halide (Fluoride, Chloride, Bromide, Iodide)
C: Komplexe Halogenide
F: Gerüst-Aluminofluoride (Tekto-Aluminofluoride)
05:Ralstonit-Gruppe

Lapis Classification

III/C.03-060

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
C: Doppelhalogenide (meist mit OH,H2O)
3: Fluoride

Classification by Hölzel

3.DG.200

3: HALIDES
D: Complex Halides
G: Acuminite-Group

Dana 8th edition

11.06.12.01

11: Halide Complexes; Alumino-fluorides
06: Halide Complexes; Alumino-fluorides with miscellaneous formulae

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Pyrochlore supergroup

Optical Properties

Color

farblos, weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

RI value α / ω / n

1.399

Ri mean

1.399

2V angle

Isotropisch

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell parameters a (Å)

9.89

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volume (ų)

967.362

X-Ray Powder Diffraction

5.74(100),
3.01(50),
2.88(80),
2.29(30),
2.04(30),
1.923(40),
1.765(90),
1.508(40)
XRD chart Hydrokenoralstonite

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)

4.5

VHN (Hardness Vickers)

280 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.55

Instability

+++ H2SO4

(Co-)Type locality

(Co-)Type locality

Grönland/Kommuneqarfik Sermersooq/Ivittuut (Ivigtut)/Kryolithlagerstätte (Cryolite deposit)

Preface

Name from

Benannt nach Rev. J. Grier Ralston (December 28, 1815 - November 10, 1880), von Norristown, Pennsylvania, USA, Endecker des Minerals.

Author (Name, Year)

Brush, 1871

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 465

Mineralogical Magazine, 2016, Vol. 80(5), pp. 915-922 [umbenannt]

IMA group assignments

Other languages

German

Hydrokenoralstonit

English

Hydrokenoralstonite

Russian

Гидрокеноральстонит

old name

German

Ralstonit

Mineralogical Magazine, 2016, Vol. 80(5), pp. 915-922 [umbenannt]

Spanish

Ralstonita

English

Ralstonite

Mineralogical Magazine, 2016, Vol. 80(5), pp. 915-922 [umbenannt]

Russian

Ральстонит

Traditional Chinese

氟鈉鎂鋁石

Simplified Chinese

氟钠镁铝石

CNMNC symbol

Symbol

Hkra

Locations with GPS information

IDs

GUSID (Global unique identifier short form) jtOlpzbbak-qsdvm5gt_XQ
GUID (Global unique identifier) A7A5D38E-DB36-4F6A-AAB1-DBE6E60B7F5D
Database ID 3204