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Okhotskite

Pictures (1 Images total)

Okhotskit
Views (File:
1584363274
): 150
Okhotskit
braune Kristalle von Okhotskit, Malosyrsky Lagerstätte, Minusinsk Depression, Yeniseisk, Krasnojarsk, Russland; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Sibirien, Föderationskreis/Krasnojarsk, Region (Krasnojarski krai)/Chakassien/Askizsky Rayon/Askiz Erz-Distrikt/Malosyrsky Lagerstätte
Mineral: Okhotskite
Image: 1584363274
License: Usage for Mineralienatlas project only
Okhotskit

braune Kristalle von Okhotskit, Malosyrsky Lagerstätte, Minusinsk Depression, Yeniseisk, Krasnojarsk, Russland; BB < 1 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-03-16
Locality: Malosyrsky Lagerstätte / Askiz Erz-Distrikt / Askizsky Rayon / Chakassien / Krasnojarsk, Region (Krasnojarski krai) / Sibirien, Föderationskreis / Russland

Collectors Summary

Color dunkelorange
Streak color blassorange
Lustre Glasglanz
Hardness (Mohs) 6
Cleavages gut
Crystal System monoklin, A2/m

Chemism

Chemical formula

Ca2Mn2+Mn3+2(Si2O7)(SiO4)(OH)2·H2O

Chemical composition

Calcium, Mangan, Silicium, Sauerstoff, Wasserstoff

Unit weight: 557.2513477 u; Number of atoms in the formula: 26

Info

Empirical formula:

Ca2MnMn2(Si2O7)(SiO4)(OH)2·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.72

4

15.38

1.0079470

4.0317880

Oxygen

O

40.20

14

53.85

15.9994300

223.9920200

Silicon

Si

15.12

3

11.54

28.0855300

84.2565900

Calcium

Ca

14.38

2

7.69

40.0784000

80.1568000

Manganese

Mn

29.58

3

11.54

54.9380499

164.8141497

Strunz 9th edition incl. updates

9.BG.20

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
G: Gruppen(Soro)-Silikate mit gemischten SiO4 und Si2O7 Gruppen; Kationen in oktahedraler [6] und größerer Koordination
20:

Lapis Classification

VIII/C.24-080

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

Classification by Hölzel

9.BN.510

9: SILICATES
B: Sorosilicates
N: With SiO4 + Si2O7
5: Pumpellyite-Group

Dana 8th edition

58.02.02.04

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)
02: Pumpellyite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Pumpellyite group

Optical Properties

Color

dunkelorange

Streak color

blassorange

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.045

Birefringence chart\! Okhotskite title=Birefringence chart Okhotskite

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

1.782

RI value β

1.82

RI value γ / ε

1.827

Ri mean

1.810

2V angle

Biaxial (-) 46° (gemessen) 46,5° (berechnet)

Orientation

Y = b, Z ^ c = 9° bis 14°

Dispersion

nicht wahrnehmbar

Absorption

Z > Y > X

Pleochroism

Stark, gelb zu tieforange

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

A2/m

Cell parameters a (Å)

8.887

Cell parameters b (Å)

6

Cell parameters c (Å)

19.53

Cell parameters a/b or c/a

1.481

Cell parameters c/b

3.255

Cell parameters α

90°

Cell parameters β

97.08

Cell parameters γ

90°

Z

4

Volumne (ų)

1033.438

X-Ray Powder Diffraction

4.76(60),
3.87(70),
2.961(100),
2.720(70),
2.665(40),
2.553(40),
2.384(40),
1.815(40)

XRD chart Okhotskite

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

Physical Properties

Hardness (Mohs)

6

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.581 ( ρ calc. Mineralienatlas )

Cleavages

gut

Preface

Author (Name, Year)

Togari & Akasaka, 1987

References

Mineralogical Magazine 51 (1987), 611

American Mineralogist 73 (1988), 1495-1496

CNMNC Newsletter No. 50; Mineralogical Magazine, 31 [Formel]

IMA group assignments

Other languages

German

Okhotskit

Spanish

Okhotskita

French

Okhotskite

English

Okhotskite

Alternative Name

Okhotskite-(Mn2+)

CNMNC (IMA)-Number

IMA 1985-010a

CNMNC symbol

Symbol

Okh