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Mcnearite (Mcnearit)

Pictures (2 Images total)

Mcnearit
Views (File:
1624645575
): 139
Mcnearit
Gruppen von weißen/farblosen Mcnearit, Hilarion Mine, Kamariza, Laurion, Attika, Griechenland; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Agios Konstantinos (Kamariza)/Kamariza Minen (Kamareza)/Hilarion Mine
Mineral: Mcnearite
Image: 1624645575
License: Usage for Mineralienatlas project only
Mcnearit

Gruppen von weißen/farblosen Mcnearit, Hilarion Mine, Kamariza, Laurion, Attika, Griechenland; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2021-06-25
Locality: Hilarion Mine / Kamariza Minen (Kamareza) / Agios Konstantinos (Kamariza) / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland
Mcnearit xx
Views (File:
1635193896
): 138
Mcnearit xx
Bildbreite 2,6 mm, Aufnahmen 43 mit der Stacking-Methode
Copyright: Karlheinz Grosch; Contribution: Karlheinz Grosch
Collection: Karlheinz Grosch
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Agios Konstantinos (Kamariza)/Kamariza Minen (Kamareza)/Hilarion Mine
Mineral: Mcnearite
Image: 1635193896
License: Usage for Mineralienatlas project only
Mcnearit xx

Bildbreite 2,6 mm, Aufnahmen 43 mit der Stacking-Methode
Collection: Karlheinz Grosch
Copyright: Karlheinz Grosch
Contribution: Karlheinz Grosch 2021-10-25
Locality: Hilarion Mine / Kamariza Minen (Kamareza) / Agios Konstantinos (Kamariza) / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland

Collectors Summary

Color weiß
Streak color weiß
Solubility +++ Säuren
Crystal System triklin, P1, P1

Chemism

Chemical formula

NaCa5H4(AsO4)5·4H2O

Chemical composition

Arsen, Calcium, Natrium, Sauerstoff, Wasserstoff

Unit weight: 994.0714642 u; Number of atoms in the formula: 47

Info

Empirical formula:

NaCa5H4(AsO4)5·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.22

12

25.53

1.0079470

12.0953640
Oxygen

O

38.63

24

51.06

15.9994300

383.9863200
Sodium

Na

2.31

1

2.13

22.9897702

22.9897702
Calcium

Ca

20.16

5

10.64

40.0784000

200.3920000
Arsenic

As

37.68

5

10.64

74.9216020

374.6080100

Analysis wt%

As2O5 : 60.59, CaO : 25.27, Na2O : 3.40, H2O : 11.32 (Ref: Schweizerische Mineralogische und Petrographische

Mitteilungen 81)

Strunz 9th edition incl. updates

8.CJ.55

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

Lapis Classification

VII/C.24-020

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

Classification by Hölzel

8.CF.300

8: PHOSPHATES ARSENATES VANADATES
C: Phosphates (-Anions +Water)
F: Phosphates, C large, V: 1 to 4
3: Valency: 1+2, V1/V2=1/1 Brushite-Group

Dana 8th edition

39.03.07.01

39: Hydrated Acid Phosphates, etc
03: Hydrated Acid Phosphates, etc with miscellaneous formulae

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.013
Birefringence chart\! Mcnearite title=Birefringence chart Mcnearite

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

1.559

RI value β

1.562

RI value γ / ε

1.572

Ri mean

1.564

2V angle

Biaxial (+) 60°

Optical Data Luminescence

Color LW-UV (365nm)

  

violett

Color SW-UV (254nm)

  

violett

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

triklin

Class (H-M)

1, 1

Space Group number

1, 2

Space Group

P1, P1

Cell parameters a (Å)

13.50

Cell parameters b (Å)

14.10

Cell parameters c (Å)

6.95

Cell parameters a/b or c/a

0.957

Cell parameters c/b

0.493

Cell parameters α

90°..

Cell parameters β

92°..

Cell parameters γ

119°..

Z

2

Volumne (ų)

1156.141

X-Ray Powder Diffraction

12.33(100),
6.94(50),
4.40(30),
3.92(60),
3.400(20),
3.122(60),
2.939(20),
2.748(40)
XRD chart Mcnearite

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

Physical Properties

Density (g/cm³)

2.6

2.855 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Frankreich/Grand Est, Region/Haut-Rhin, Département/Colmar-Ribeauvillé, Arrondissement/Sainte-Marie-aux-Mines (Markirch)/Neuenberg/Gang St.Jakob/Grube Gabe Gottes (inkl. Giftgrube)

Preface

Author (Name, Year)

Sarp & Deferne & Liebich, 1981

References

Schweizerische Mineralogische und Petrographische Mitteilungen 61 (1981), 1

Other languages

German

Mcnearit

Spanish

Mcnearita

French

Mcnearite

English

Mcnearite

CNMNC (IMA)-Number

IMA 1980-017

CNMNC symbol

Symbol

Mnr

Locations with GPS information