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Depmeierite

Pictures (1 Images total)

Depmeierit
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Depmeierit
farbloser Depmeierit, Karnarsurt Mine, Karnasurt Mountain, Lovozero Massiv, Halbinsel Kola, Russland; BB ~ 5 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Karnasurt, Berg/Karnasurt Mine
Mineral: Depmeierite
Image: 1634144862
License: Usage for Mineralienatlas project only
Depmeierit

farbloser Depmeierit, Karnarsurt Mine, Karnasurt Mountain, Lovozero Massiv, Halbinsel Kola, Russland; BB 5 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2021-10-13
Locality: Karnasurt Mine / Karnasurt, Berg / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color farblos
Lustre Glasglanz
Hardness (Mohs) 5
Cleavages vollkommen (100)
Crystal System hexagonal, P63
Morphology farblose isometrische Körner, bis 1 cm Größe

Chemism

Chemical formula

Na8[Al6Si6O24](PO4,CO3)1-x·3H2O {x < 0.5}

Additional chem. information

Cancrinit-Gruppe; das PO4-dominante Analog von Cancrinit, Vishnevit, Hydroxycancrinit und Kyanoxalith

Chemical composition

Aluminium, Natrium, Silicium, Kohlenstoff, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 995.468302 u; Number of atoms in the formula: 55.375

Info

Empirical formula:

Na8[Al6Si6O24]((PO4)0.75(CO3)0.25)0.5·3H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.61

6

10.84

1.0079470

6.0476820

Carbon

C

0.15

0.13

0.23

12.0107800

1.5013475

Oxygen

O

46.41

28.88

52.14

15.9994300

461.9835413

Sodium

Na

18.48

8

14.45

22.9897702

183.9181616

Aluminium

Al

16.26

6

10.84

26.9815382

161.8892292

Silicon

Si

16.93

6

10.84

28.0855300

168.5131800

Phosphorus

P

1.17

0.38

0.68

30.9737612

11.6151605

Analysis wt%

SO3 : 0.08, P2O5 : 3.30, SiO2 : 36.48, CO2 : 0.97, Al2O3 : 29.07, Fe2O3 : 0.03, Na2O : 23.04, K2O : 0.54, H2O : 5.93 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 2010)

Strunz 9th edition incl. updates

9.FB.05

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
B: Gerüstsilikate (Tektosilicates) mit weiteren [Anionen]
05:Cancrinit-Gruppe

Lapis Classification

VIII/J.09-016

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
9: Mit tetraederfremden Anionen; Cancrinit-Gruppe

Classification by Hölzel

9.FE.180

9: SILICATES
F: Tektosilicates
E: Hexagonal or trigonal with other Anions
1: Cancrinite-Group - hexagonal, axis for a~~12A and c~~5A

IMA status

anerkanntes Mineral - Neue Mineralien IMA WEB-Seite Dezember 2009

Mineral status

anerkanntes Mineral

Variety / polytype of

Cancrinite Subgroup

Optical Properties

Color

farblos

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.004

Birefringence chart\! Depmeierite title=Birefringence chart Depmeierite

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

1.493

RI value γ / ε

1.497

Ri mean

1.494

2V angle

Uniaxial (+)

Crystallography

Crystal System

hexagonal

Class (H-M)

6

Space Group number

173

Space Group

P63

Cell parameters a (Å)

12.735

Cell parameters b (Å)

-

Cell parameters c (Å)

5.180

Cell parameters a/b or c/a

0.407

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

1

Volumne (ų)

727.542

Kristall structure

Struktur ermittelt

X-Ray Powder Diffraction

6.380(30), 4.695(91), 3.681(37), 3.250(100), 2.758(33), 2.596(31), 2.436(21), 2.121(24)

XRD chart Depmeierite

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

Morphology

farblose isometrische Körner, bis 1 cm Größe

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.321(1) (gemessen) 2.313 (berechnet)

2.272 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen (100)

Tenacity

spröde

Chemical Properties and Tests

IR-Spektrum beschrieben, siehe Pekov et al., 2011

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Karnasurt, Berg/Karnasurt Mine

Type material

Fersman Mineralogical Museum der Russischen Akademie der Wissenschaften in Moskau

Paragenesis of type material

Natrolith, Steenstrupin-(Ce), Vuonnemit, Epistolit, Sodalith, Aegirin, Serandit, Natisit, Vitusit-(Ce)

Preface

Name from

Wulf Helmut Heinz Depmeier (geboren 1944), Professor der Mineralogie und Kristallographie an der Christian-Albrechts-Universität in Kiel

Author (Name, Year)

Igor V. Pekov et al., 2010

References

Original in russ. Sprache: I.V. Pekov, L.V. Olysych, N.V. Zubkova, N.V. Chukanov, K.V. Van, D.Yu. Pushcharovsky, Zapiski RMO (Proceedings of the Russian Mineralogical Society), 2010, No. 4, pp. 63–74.

I. V. Pekov, L. V. Olysych, N. V. Zubkova, N. V. Chukanov, K. V. Van, D. Yu. Pushcharovsky: Depmeierite Na8[Al6Si6O24](PO4,CO3)1−x • 3H2O (x < 0.5): A new cancrinite-group mineral species from the Lovozero alkaline pluton of the Kola Peninsula. Geology of Ore Deposits Volume 53 Number 7 (2011) S. 604-613.

Neue Mineralien IMA WEB-Seite Dezember 2009

Other languages

German

Depmeierit

Spanish

Depmeierita

English

Depmeierite

Russian

Депмайерит

CNMNC (IMA)-Number

IMA 2009-075

CNMNC symbol

Symbol

Dep