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Manganokhomyakovite (Manganokhomyakovit)

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Manganokhomyakovit
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Manganokhomyakovit
Mount St. Hilaire, Quebec, Kanada. BB: 1,0mm
Copyright: Mabu; Contribution: Mabu
Collection: Mabu
Location: Kanada/Québec/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire
Mineral: Manganokhomyakovite
Image: 1549120853
License: Usage for Mineralienatlas project only
Manganokhomyakovit

Mount St. Hilaire, Quebec, Kanada. BB: 1,0mm
Collection: Mabu
Copyright: Mabu
Contribution: Mabu 2019-02-02
Locality: Mont Saint-Hilaire / La Vallée-du-Richelieu RCM / Montérégie, Region / Québec / Kanada

Collectors Summary

Hardness (Mohs) 5.5
Cleavages keine
Fracture uneben
Crystal System trigonal, R3m

Chemism

Chemical formula

Na12Sr3Ca6(Mn2+,Fe2+)3Zr3(W,Nb)[(OH,Cl)|Si0.5(O,OH)2|Si3O9|Si9O27]2

Chemical composition

Calcium, Chlor, Eisen, Mangan, Natrium, Niob, Silicium, Strontium, Zirconium, Sauerstoff, Wasserstoff, Wolfram

Unit weight: 3341.825642675 u; Number of atoms in the formula: 133.5

Info

Empirical formula:

Na12Sr3Ca6(Mn0.75Fe0.25)3Zr3(W0.75Nb0.25)[((OH)0.75Cl0.25)Si0.5(O0.75(OH)0.25)2Si3O9Si9O27]2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.08

2.5

1.87

1.0079470

2.5198675
Oxygen

O

37.10

77.5

58.05

15.9994300

1,239.9558250
Sodium

Na

8.26

12

8.99

22.9897702

275.8772424
Silicon

Si

21.01

25

18.73

28.0855300

702.1382500
Chlorine

Cl

0.53

0.5

0.37

35.4532000

17.7266000
Calcium

Ca

7.20

6

4.49

40.0784000

240.4704000
Manganese

Mn

3.70

2.25

1.69

54.9380499

123.6106123
Iron

Fe

1.25

0.75

0.56

55.8452000

41.8839000
Strontium

Sr

7.87

3

2.25

87.6210000

262.8630000
Zirconium

Zr

8.19

3

2.25

91.2242000

273.6726000
Niobium

Nb

0.70

0.25

0.19

92.9063820

23.2265955
Tungsten

W

4.13

0.75

0.56

183.8410000

137.8807500

Analysis wt%

SiO2 : 42.98, WO3 : 4.48, Nb2O5 : 1.58, ZrO2 : 10.43, FeO : 2.58, MnO : 4.21, CaO : 10.20, SrO : 9.17, Na2O : 10.37, K2O : 0.41, Cl : 0.84, H2O : 0.83 (Ref: Canadian Mineralogist 99)

Strunz 9th edition incl. updates

9.CO.10

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
O: ~[Si9O27]18- neuner-Ringe
10:Eudialyt-Gruppe

Lapis Classification

VIII/E.25-070

VIII: SILIKATE
E: Ringsilikate
25: Neunerringe + Dreierringe; Eudialyt-Gruppe

Classification by Hölzel

9.CG.250

9: SILICATES
C: Cyclosilicates
G: ~[Si3O9]6-- + ~[Si9O27]18--Rings Eudialyte-Group
2: Eudialyte-Subgroup - c=30, Mn- Series

Dana 8th edition

64.01.01.05

64: Cyclosilicates Cyclosilicates
01: Cyclosilicates Cyclosilicates Cyclosilicate Rings with Other Anions and Insular Silicate Groups with mixed ring types
01: Eudialyte Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Eudialyte group

Optical Properties

max. Birefringence

0.003
Birefringence chart\! Manganokhomyakovite title=Birefringence chart Manganokhomyakovite

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

1.629

RI value γ / ε

1.626

Ri mean

1.628

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

160

Space Group

R3m

Cell parameters a (Å)

14.282

Cell parameters b (Å)

-

Cell parameters c (Å)

30.12

Cell parameters a/b or c/a

2.109

Cell parameters c/b

-

Z

3

Volumne (ų)

5320.637

X-Ray Powder Diffraction

11.50(90),
9.530(70),
6.450(50),
6.070(50),
5.735(50),
3.406(50),
2.980(100),
2.856(80)
XRD chart Manganokhomyakovite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.13 (gemessen)

3.129 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Kanada/Québec/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)

Preface

Author (Name, Year)

Johnsen & Gault & Grice & Ercit, 1999

References

Canadian Mineralogist 37 (1999), 893

IMA group assignments

Other languages

German

Manganokhomyakovit

Spanish

Manganokhomyakovita

English

Manganokhomyakovite

French

Manganokhomyakovite

CNMNC (IMA)-Number

IMA 1998-043

CNMNC symbol

Symbol

Mkmy

Locations with GPS information