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Ryabchikovite

Collectors Summary

Crystal System monoklin, P21/c
Morphology dünne (bis zu 25 μm), hellbraune bis rötlichbraune epitaktisch aufgewachsene Krusten auf kurzprismatischen, bräunlich-grauen Diopsidkristallen (bis zu 0.5 mm)

Chemism

Chemical formula

CuMgSi2O6

Empirical formula (analysis)

(Mg1.05Cu0.78Zn0.06Fe3+0.06Ca0.03)(Si1.96Al0.04O6)

Chemical composition

Kupfer, Magnesium, Silicium, Sauerstoff

Unit weight: 235.687535328 u; Number of atoms in the formula: 9.98

Info

Empirical formula:

(Mg1.05Cu0.78Zn0.06Fe0.06Ca0.03)(Si1.96Al0.04O6)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

40.73

6

60.12

15.9994300

95.9965800
Magnesium

Mg

10.83

1.05

10.52

24.3050600

25.5203130
Aluminium

Al

0.46

0.04

0.40

26.9815382

1.0792615
Silicon

Si

23.36

1.96

19.64

28.0855300

55.0476388
Calcium

Ca

0.51

0.03

0.30

40.0784000

1.2023520
Iron

Fe

1.42

0.06

0.60

55.8452000

3.3507120
Copper

Cu

21.03

0.78

7.82

63.5463000

49.5661140
Zinc

Zn

1.67

0.06

0.60

65.4094000

3.9245640

IMA status

anerkannt - CNMNC Newsletter 61, April - Mai 2021

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Pyroxene group  ⇒ Clinopyroxene group

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

9.731(9)

Cell parameters b (Å)

8.929(8)

Cell parameters c (Å)

5.221(4)

Cell parameters a/b or c/a

1.09

Cell parameters c/b

0.585

Cell parameters α

90°

Cell parameters β

110.00(6)°

Cell parameters γ

90°

Z

4

Volume (ų)

426.285

Crystal structure

Pyroxen-Gruppe
ein Cu,Mg-ordered Analogon von Klinoenstatit

X-Ray Powder Diffraction

4.403(38), 4.307(27), 3.746(32), 3.291(27), 3.177(100), 2.876(75), 2.456(26), 2.215(26)
XRD chart Ryabchikovite

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

Morphology

dünne (bis zu 25 μm), hellbraune bis rötlichbraune epitaktisch aufgewachsene Krusten auf kurzprismatischen, bräunlich-grauen Diopsidkristallen (bis zu 0.5 mm)

Physical Properties

Density (g/cm³)

3.672 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Russland/Ferner Osten, Föderationskreis/Kamtschatka, Krai/Milkowski (Milkovsky), Rajon/Tolbachik-Vulkan-Feld/Große Spalteneruption (Great Fissure)/nördlicher Bruch/zweiter Schlackenkegel/Arsenatnaya Fumarole

Type material

Das Typmaterial ist in den Sammlungen des Fersman Mineralogischen Museums, Russische Akademie der Wissenschaften, Leninskiy Prospekt 18-2, Moskau 119071, Russland, Registriernummer 5642 hinterlegt.

Paragenesis of type material

Diopsid

Preface

Rareness

Extremely rare

Name from

dem russischen Geochemiker und Petrologen Igor Dmitrievich Ryabchikov (1937–2017)

Author (Name, Year)

Nadezhda V. Shchipalkina; Oleg S. Vereshchagin ; Igor V. Pekov; Dmitry I. Belakovskiy; Natalia N. Koshlyakova, Vladimir V. Shilovskikh; Dmitriy V. Pankin; Sergey N. Britvin; Fedor D. Sandalov; Evgeny G. Sidorov (2023)

References

Shchipalkina, N. V., Vereshchagin, O. S., Pekov, I. V., Belakovskiy, D. I., Koshlyakova, N. N., Shilovskikh, V. V., Pankin, D. V., Britvin, S. N., Sandalov, F. D., and Sidorov, E. G.: Ryabchikovite, IMA 2021-011, in: CNMNC Newsletter 61, Eur. J. Mineral., 33, https://doi.org/10.5194/ejm-33-299-2021, 2021.

Nadezhda V. Shchipalkina; Oleg S. Vereshchagin ; Igor V. Pekov; Dmitry I. Belakovskiy; Natalia N. Koshlyakova, Vladimir V. Shilovskikh; Dmitriy V. Pankin; Sergey N. Britvin; Fedor D. Sandalov; Evgeny G. Sidorov: Ryabchikovite, CuMg(Si2O6), a new pyroxene group mineral, and some genetic features of natural anhydrous copper silicates. American Mineralogist Vol. 108, Nr. 7 (2023) S. 1399-1408.

IMA group assignments

Other languages

German

Ryabchikovit

English

Ryabchikovite

CNMNC (IMA)-Number

IMA 2021-011

Locations with GPS information

IDs

GUSID (Global unique identifier short form) rn5NKoT-aU-HJMNkfrdPkw
GUID (Global unique identifier) 2A4D7EAE-FE84-4F69-8724-C3647EB74F93
Database ID 9042