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Chivruaiite (Chivruaiit)

Pictures (1 Images total)

Chivruaiit
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Chivruaiit
hellrosane Kristalle von Chivruaiit neben farblosen, prismatischen Kristallen von Natrolith, Chivruai Flusstal, Lovozero, Kola, Russland; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Chivruai, Fluss
Mineral: Chivruaiite
Image: 1581243169
License: Usage for Mineralienatlas project only
Chivruaiit

hellrosane Kristalle von Chivruaiit neben farblosen, prismatischen Kristallen von Natrolith, Chivruai Flusstal, Lovozero, Kola, Russland; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-02-09
Locality: Chivruai, Fluss / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Hardness (Mohs) 3
Cleavages deutlich (100) und (010)
Fracture treppenartig
Crystal System orthorhombisch, Cmmm

Chemism

Chemical formula

Ca3Ti5[(Si6O17)2|O(OH)4]·14H2O

Additional chem. information

Zorit Gruppe

Chemical composition

Calcium, Silicium, Titan, Sauerstoff, Wasserstoff

Unit weight: 1576.821154 u; Number of atoms in the formula: 105

Info

Empirical formula:

Ca3Ti5[(Si6O17)2O(OH)4]·14H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.05

32

30.48

1.0079470

32.2543040
Oxygen

O

53.78

53

50.48

15.9994300

847.9697900
Silicon

Si

21.37

12

11.43

28.0855300

337.0263600
Calcium

Ca

7.63

3

2.86

40.0784000

120.2352000
Titanium

Ti

15.18

5

4.76

47.8671000

239.3355000

Analysis wt%

Ø SiO2 : 45.14, Nb2O5 : 3.63, TiO2 : 20.63, CaO : 10.53, K2O : 1.30, H2O : 17.30 (Ref: American Mineralogist 2006)

Strunz 9th edition incl. updates

9.DG.45

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
G: Ketten- und Bandsilikate mit 3-periodischen Einfach- und Mehrfachketten
45:Zorit-Gruppe

Lapis Classification

VIII/F.22-018

VIII: SILIKATE
F: Ketten- und Bandsilikate
22: Dreierbänder [Si6O15/17] 6-/10- und modifizierte Dreierbänder

Classification by Hölzel

9.DN.195

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
N: ~[Si6O17]10--...~[Si6O15]6--...3-Band Xonotlite-Group

Dana 8th edition

66.03.01.07

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
03: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with chains P>2
01: P=3

IMA status

anerkannt 2004

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Zorite group

Optical Properties

max. Birefringence

0.093
Birefringence chart\! Chivruaiite title=Birefringence chart Chivruaiite

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

1.612

RI value β

1.627

RI value γ / ε

1.705

Ri mean

1.648

2V angle

Biaxial (+) 40°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

65

Space Group

Cmmm

Cell parameters a (Å)

7.192

Cell parameters b (Å)

23.166

Cell parameters c (Å)

6.947

Cell parameters a/b or c/a

0.31

Cell parameters c/b

0.30

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

1

Volumne (ų)

1157.439

X-Ray Powder Diffraction

11.6(10), 6.91(9), 5.23(5), 3.41(5), 3.35(5), 3.04(8), 2.97(4), 2.58(5)
XRD chart Chivruaiite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.41 (gemessen)

2.262 ( ρ calc. Mineralienatlas )

Cleavages

deutlich (100) und (010)

Fracture

treppenartig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Chivruai, Fluss

Preface

Author (Name, Year)

Men'shikov & Krivovichev & Pakhomovsky & Yakovenchuk & Ivanyuk & Mikha

References

American Mineralogist 91 (2006), 922

IMA group assignments

Other languages

German

Chivruaiit

English

Chivruaiite

Russian

Чивруайит

CNMNC (IMA)-Number

IMA 2004-052

CNMNC symbol

Symbol

Cvr

Locations with GPS information