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Krinovite (铬镁硅石)

Collectors Summary

Color smaragdgrün
Streak color grünlichweiß
Hardness (Mohs) 5.50 - 7.00
Crystal System triklin, P1

Chemism

Chem­ical formula

Na4[Mg8Cr3+4]O4[Si12O36]

Chem­ical com­po­si­tion

Chrom, Magnesium, Natrium, Silicium, Sauerstoff

Unit weight: 1471.3877608 u; Number of atoms in the formula: 68

Info

Empirical formula:

Na4[Mg8Cr4]O4[Si12O36]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

43.49

40

58.82

15.9994300

639.9772000

Sodium

Na

6.25

4

5.88

22.9897702

91.9590808

Magnesium

Mg

13.21

8

11.76

24.3050600

194.4404800

Silicon

Si

22.91

12

17.65

28.0855300

337.0263600

Chromium

Cr

14.14

4

5.88

51.9961600

207.9846400

Anal­y­sis wt%

SiO2 : 48.10, TiO2 : 0.50, Al2O3 : 0.60, Cr2O3 : 19.10, FeO : 1.80, MgO : 19.70, Na2O : 9.10 (Ref: Science 68)

Strunz 9th edi­tion incl. updates

9.DH.40

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
H: Ketten- und Bandsilikate mit 4-periodischen Einfachketten, Si4O12
40:Aenigmatit-Gruppe

Lapis Clas­sifica­tion

VIII/F.14-010

VIII: SILIKATE
F: Ketten- und Bandsilikate
14: Verzweigte Kettenstrukturen; Aenigmatit-Gruppe

Clas­sifica­tion by Hölzel

9.DK.220

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
K: With branched chains - Sapphirine-Supergroup
2: Aenigmatite-Group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Sapphirine supergroup  ⇒ Aenigmatite group

Optical Properties

Color

smaragdgrün

Streak color

grünlichweiß

max. Birefrin­gence

0.048

Birefringence chart\! Krinovite title=Birefringence chart Krinovite

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

1.712

RI value β

1.725

RI value γ / ε

1.760

Ri mean

1.732

2V angle

Biaxial (+) 61°

Crystallography

Crystal Sys­tem

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell param­e­ters a (Å)

10.22

Cell param­e­ters b (Å)

10.67

Cell param­e­ters c (Å)

8.80

Cell param­e­ters a/b or c/a

0.958

Cell param­e­ters c/b

0.825

Cell param­e­ters α

105.13

Cell param­e­ters β

96.60

Cell param­e­ters γ

125.2

Z

1

Volumne (ų)

712.837

X-Ray Pow­der Diffrac­tion

7.92(60),
3.639(60),
3.104(60),
2.893(80),
2.655(90),
2.501(100),
2.080(70),
2.049(60)

XRD chart Krinovite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.50 - 7.00

VHN (Hard­ness Vick­ers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.38 (gemessen)

3.427 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

USA/Arizona/Coconino Co./Winslow/Canyon Diablo Meteorit

Preface

Author (Name, Year)

Olsen & Fuchs, 1968

References

Science 161 (1968), 786

IMA group assignments

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Aenigmatite

Na2Fe2+5TiSi6O20

triklin : 1 : P1

9.DH.40

Dorrite

Ca4[Mg3Fe3+9]O4[Si3Al8Fe3+O36]

triklin : 1, 1 : P1, P1

9.DH.40

Høgtuvaite

(Ca,Na)2(Fe2+,Fe3+,Ti4+)6[O2|Be(Si,Al)5O18]

9.DH.40

Krinovite

Na4[Mg8Cr3+4]O4[Si12O36]

triklin : 1 : P1

9.DH.40

Kuratite

Ca2(Fe2+5Ti)O2[Si4Al2O18]

triklin : 1 : P1

9.DH.40

Rhönite

Ca2(Mg,Fe2+,Fe3+,Ti)6(Si,Al)6O20

triklin : 1 : P1

9.DH.40

Wilkinsonite

Na4[Fe2+8Fe3+4]O4[Si12O36]

triklin : 1, 1 : P1, P1

9.DH.40

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Krinovite

Na4[Mg8Cr3+4]O4[Si12O36]

triklin : 1 : P1

VIII/F.14-010

Aenigmatite

Na2Fe2+5TiSi6O20

triklin : 1 : P1

VIII/F.14-020

Wilkinsonite

Na4[Fe2+8Fe3+4]O4[Si12O36]

triklin : 1, 1 : P1, P1

VIII/F.14-030

Makarochkinite

(Ca,Na,Mn)2(Fe2+,Fe3+,Ti,Mg)6[O2|(Si,Be,Al)6O18]

triklin : 1 : P1

VIII/F.14-033

Høgtuvaite

(Ca,Na)2(Fe2+,Fe3+,Ti4+)6[O2|Be(Si,Al)5O18]

VIII/F.14-035

Dorrite

Ca4[Mg3Fe3+9]O4[Si3Al8Fe3+O36]

triklin : 1, 1 : P1, P1

VIII/F.14-040

Rhönite

Ca2(Mg,Fe2+,Fe3+,Ti)6(Si,Al)6O20

triklin : 1 : P1

VIII/F.14-050

Serendibite

Ca2(Mg,Al)6(Si,Al,B)6O20

triklin : 1 : P1

VIII/F.14-060

Welshite

Ca4[Mg9Sb5+3]O4[Si6Be3AlFe3+2O36]

triklin : 1 : P1

VIII/F.14-070

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Aenigmatite

Na2Fe2+5TiSi6O20

triklin : 1 : P1

9.DK.200

Wilkinsonite

Na4[Fe2+8Fe3+4]O4[Si12O36]

triklin : 1, 1 : P1, P1

9.DK.210

Krinovite

Na4[Mg8Cr3+4]O4[Si12O36]

triklin : 1 : P1

9.DK.220

Other languages

German

Krinovit

Spanish

Krinovita

English

Krinovite

French

Krinovite

Russian

Криновит

Simplified Chinese

硅铬镁石

Alternative Name

Simplified Chinese

铬镁硅石

IMA Number

IMA 1967-016

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Krinovit
Google-Bilder-Suche - search for: Krinovit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Krinovit

English pages

Mindat - search for: Krinovite
Webmineral - search for:Krinovite
Handbook-of-Mineralogy - search for: Krinovite
RRUFF - Raman, XRD and other mineral data - search for: Krinovite
RRUFF - References and PDF downloads - search for: Krinovite
American-Mineralogist-Crystal-Structure-Database - search for: Krinovite
Athena - search for: Krinovite

Russian pages

Webmineral.ru - search for: Криновит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Krinovit
Bosse - search for: Krinovit

Locations with GPS information




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