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Mukhinite (Mukhinit)

Collectors Summary

Color schwarz
Streak color bräunlich grau
Hardness (Mohs) 8
Solubility ++ Säuren
Crystal System monoklin,

Chemism

Chemical formula

Ca2Al2V3+(SiO4)3(OH)

Chemical composition

Aluminium, Calcium, Silicium, Sauerstoff, Vanadium, Wasserstoff

Unit weight: 478.3185134 u; Number of atoms in the formula: 22

Info

Empirical formula:

Ca2Al2V(SiO4)3(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.21

1

4.55

1.0079470

1.0079470

Oxygen

O

43.48

13

59.09

15.9994300

207.9925900

Aluminium

Al

11.28

2

9.09

26.9815382

53.9630764

Silicon

Si

17.62

3

13.64

28.0855300

84.2565900

Calcium

Ca

16.76

2

9.09

40.0784000

80.1568000

Vanadium

V

10.65

1

4.55

50.9415100

50.9415100

Strunz 9th edition incl. updates

9.BG.05

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
G: Gruppen(Soro)-Silikate mit gemischten SiO4 und Si2O7 Gruppen; Kationen in oktahedraler [6] und größerer Koordination
05:Epidot-Gruppe

Lapis Classification

VIII/C.23-028

VIII: SILIKATE
C: Gruppensilikate
23: Mischstrukturen mit [SiO4] 4--Inseln und [Si2O7] 6--Gruppen; Epidot-Gruppe

Classification by Hölzel

9.BN.140

9: SILICATES
B: Sorosilicates
N: With SiO4 + Si2O7
1: Clinozoisite-Group

Dana 8th edition

58.02.01a.10

58: Sorosilicates Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
02: Sorosilicates Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n=1,2)
01a: Epidote group (Clinozoisite subgroup)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz

Streak color

bräunlich grau

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.032

Birefringence chart\! Mukhinite title=Birefringence chart Mukhinite

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

1.723

RI value β

1.733

RI value γ / ε

1.755

Ri mean

1.737

2V angle

Biaxial (+) 88°

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

8.90

Cell parameters b (Å)

5.61

Cell parameters c (Å)

10.15

Cell parameters a/b or c/a

1.586

Cell parameters c/b

1.809

Cell parameters α

90°

Cell parameters β

115.50

Cell parameters γ

90°

Z

2

Volumne (ų)

457.412

X-Ray Powder Diffraction

2.892(100),
2.682(80),
2.600(80),
2.530(70),
2.398(80),
1.638(70),
1.405(80),
1.394(80)

XRD chart Mukhinite

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

Physical Properties

Hardness (Mohs)

8

VHN (Hardness Vickers)

1375

Density (g/cm³)

3.45 (berechnet)

3.473 ( ρ calc. Mineralienatlas )

Instability

++ Säuren

Preface

Author (Name, Year)

Shepel & Karpenko, 1969

References

Transactions (Doklady) of the USSR Academy of Sciences, Earth Science Sections 185 (1969), 123.

Mariko Nagashima, Daisuke Nishio-Hamane, Nobuhiko Nakano, Toshisuke Kawasaki: Synthesis and crystal chemistry of mukhinite, V-analogue of clinozoisite on the join Ca2Al3Si3O12(OH)–Ca2Al2VSi3O12(OH). Physics and Chemistry of Minerals Volume 46, Issue 1 (2019) S. 63–76.

Other languages

German

Mukhinit

Spanish

Mukhinita

English

Mukhinite

French

Mukhinite

Russian

Мухинит

Japanese

ムーケナイト

Alternative Name

German

Muchinit

Spanish

Muchinita

Muchinite

CNMNC (IMA)-Number

IMA 1968-035

CNMNC symbol

Symbol

Muk

Locations with GPS information