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Elpidite (Elpidit)

Pictures (26 Images total)

Elpidit
Views (File:
1292360630
): 1577
Elpidit
Größe: 70 mm; Fundort: Poudrette Quarry, Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: David K. Joyce; Contribution: slugslayer
Location: Kanada/Québec/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Elpidite
Image: 1292360630
Rating: 10 (votes: 1)
License: Usage for Mineralienatlas project only
Elpidit

Größe: 70 mm; Fundort: Poudrette Quarry, Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: David K. Joyce
Contribution: slugslayer 2010-12-14
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec / Kanada
Elpidit
Views (File:
1295886135
): 2161
Elpidit
Höhe: 3,5 cm, Fundort: Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: Michael Roarke; Contribution: thdun5
Location: Kanada/Québec/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire
Mineral: Elpidite
Image: 1295886135
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
Elpidit

Höhe: 3,5 cm, Fundort: Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: Michael Roarke
Contribution: thdun5 2011-01-24
Locality: Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec / Kanada
Elpidit
Views (File:
1215468781
): 1945
Elpidit
FO.: Umba Mine bzw. Umbozero-Bergwerk am Ufer des Umbozero-Sees am östlichen Ufer des Berges Alluaiv, Halbinsel Kola (zentral), Lovozero Tundra, Russland / Stufengröße: 11 x 9 cm
Copyright: Hrouda; Contribution: Hrouda
Collection: Museum für Naturkunde Gera
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Alluaiv/Umbozero
Mineral: Elpidite
Image: 1215468781
Rating: 7.67 (votes: 3)
License: Usage for Mineralienatlas project only
Elpidit

FO.: Umba Mine bzw. Umbozero-Bergwerk am Ufer des Umbozero-Sees am östlichen Ufer des Berges Alluaiv, Halbinsel Kola (zentral), Lovozero Tundra, Russland / Stufengröße: 11 x 9 cm
Collection: Museum für Naturkunde Gera
Copyright: Hrouda
Contribution: Hrouda 2008-07-08
Locality: Umbozero / Alluaiv / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Elpidit
Views (File:
1262696219
): 1233
Elpidit
Bildbreite: 15 mm; Fundort: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Kanada/Québec/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Elpidite
Image: 1262696219
Rating: 7.5 (votes: 2)
License: Usage for Mineralienatlas project only
Elpidit

Bildbreite: 15 mm; Fundort: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire, Rouville Co., Québec, Kanada
Copyright: Stephan Wolfsried
Contribution: Hg 2010-01-05
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec / Kanada
Elpidit
Views (File:
1306006674
): 966
Elpidit
Poudrette Quarry, Mont Saint-Hilaire, Quebec, Canada, 48x20 mm
Copyright: Embarak; Contribution: Embarak
Collection: Embarak
Location: Kanada/Québec/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)
Mineral: Elpidite
Image: 1306006674
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Elpidit

Poudrette Quarry, Mont Saint-Hilaire, Quebec, Canada, 48x20 mm
Collection: Embarak
Copyright: Embarak
Contribution: Embarak 2011-05-21
Locality: Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry) / Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec / Kanada
Elpidit
Views (File:
1319291781
): 789
Elpidit
Bildbreite: 5,1 mm; Fundort: Alluaiv, Lovozero-Massiv, Kola-Halbinsel, Murmansk, Russland
Copyright: Enrico Bonacina; Contribution: Hg
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Alluaiv
Mineral: Elpidite
Image: 1319291781
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Elpidit

Bildbreite: 5,1 mm; Fundort: Alluaiv, Lovozero-Massiv, Kola-Halbinsel, Murmansk, Russland
Copyright: Enrico Bonacina
Contribution: Hg 2011-10-22
Locality: Alluaiv / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

You find additional Elpidit specimen at the Geolitho Museum

Collectors Summary

Color braun, farblos, gelbbraun, weiß, hellrot
Streak color weiß
Hardness (Mohs) 5
Solubility +++ HF, - HCl, H2SO4
Crystal System orthorhombisch, Pbm2

Chemism

Chemical formula

Na2ZrSi6O15·3 H2O

Chemical composition

Natrium, Silicium, Zirconium, Sauerstoff, Wasserstoff

Unit weight: 599.7543424 u; Number of atoms in the formula: 33

Info

Empirical formula:

Na2ZrSi6O15·3H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.01

6

18.18

1.0079470

6.0476820
Oxygen

O

48.02

18

54.55

15.9994300

287.9897400
Sodium

Na

7.67

2

6.06

22.9897702

45.9795404
Silicon

Si

28.10

6

18.18

28.0855300

168.5131800
Zirconium

Zr

15.21

1

3.03

91.2242000

91.2242000

Analysis wt%

SiO2 : 59.44, ZrO2 : 20.48, Na2O : 10.35, H2O : 9.61 (Ref: Hintze, Handbuch der Mineralogie, 1904-1974)

Strunz 9th edition incl. updates

9.DG.65

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
G: Ketten- und Bandsilikate mit 3-periodischen Einfach- und Mehrfachketten
65:Elpidit-Gruppe

Lapis Classification

VIII/F.23-010

VIII: SILIKATE
F: Ketten- und Bandsilikate
23: Dreierbänder [Si6O15/17] 6-/10- und modifizierte Dreierbänder

Classification by Hölzel

9.DN.200

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
N: ~[Si6O17]10--...~[Si6O15]6--...3-Band Xonotlite-Group

Dana 8th edition

72.05.04.02

72: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
05: Phyllosilicates Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with corrugated and complex layers
04: Elpidite/armstrongite

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

braun, farblos, gelbbraun, weiß, hellrot

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.012
Birefringence chart\! Elpidite title=Birefringence chart Elpidite

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

1.562

RI value β

1.568

RI value γ / ε

1.574

Ri mean

1.568

2V angle

Biaxial (+) 83°~

Optical Data Luminescence

Color LW-UV (365nm)

  

gelblich grün

Color SW-UV (254nm)

  

gelblich grün

SW-UV Other Colors

  

weiß

Most Common Activator

(UO2)2+ (Uranyl-Ion) als Verunreinigungen

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mm2

Space Group number

28

Space Group

Pbm2

Cell parameters a (Å)

7.33

Cell parameters b (Å)

14.47

Cell parameters c (Å)

7.07

Cell parameters a/b or c/a

0.507

Cell parameters c/b

0.489

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volumne (ų)

749.88

X-Ray Powder Diffraction

7.08(100),
6.52(50),
5.11(100),
4.77(50),
4.13(50),
3.24(100),
3.10(100)
XRD chart Elpidite

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)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.54

2.656 ( ρ calc. Mineralienatlas )

Instability

+++ HF, - HCl, H2SO4

(Co-)Type locality

(Co-)Type locality

Grönland/Qaasuitsup Kommunia/Narsaarsuk (Narssârssuk)

Preface

Author (Name, Year)

Lindström, 1894

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 211

Other languages

German

Elpidit

Spanish

Elpidita

French

Elpidite

English

Elpidite

Russian

Эльпидит

Japanese

エルピド石

Alternative Name

Traditional Chinese

斜鈉鋯石

Simplified Chinese

斜钠锆石

Traditional Chinese

纖矽鋯鈉石

Simplified Chinese

纤硅锆钠石

Traditional Chinese

鈉鋯石

Simplified Chinese

钠锆石

CNMNC symbol

Symbol

Epd

Locations with GPS information