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Larnite (Larnit)

Pictures (2 Images total)

Larnit
Views (Image: 1407231432): 3293
Larnit

Steinbruch Bellerberg, Ettringen, Eifel, Rheinland-Pfalz, Deutschland. Bildbreite 1 mm
Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2014-08-05
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Larnit
Views (Image: 1417209394): 2912
Larnit (SNr: A018307)

Auf der Stufe sind neben verschiedenen weißen Partien grünliche Einschlüsse von Larnit zu sehen. Die braunen Einschlüsse sind uns nicht bekannt, BB = 6,1 mm; Fundort: Stbr. Caspar, Ettringer Beller...
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2014-11-28
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Collectors Summary

Color farblos, grau
Streak color weiß
Hardness (Mohs) 6
Solubility +++ Säuren, + H2O
Crystal System monoklin, P21/n

Chemism

Chem­ical formula

Ca2SiO4

Chem­ical com­po­si­tion

Calcium, Silicium, Sauerstoff

Unit weight: 172.24005 u; Number of atoms in the formula: 7

Info

Empirical formula:

Ca2SiO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

37.16

4

57.14

15.9994300

63.9977200
Silicon

Si

16.31

1

14.29

28.0855300

28.0855300
Calcium

Ca

46.54

2

28.57

40.0784000

80.1568000

Strunz 9th edi­tion incl. updates

9.AD.05

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
D: Insel(Neso)silikate ohne weitere Anionen; Kationen in oktahedraler [6] und gewöhnlich größerer Koordination
05:Larnit-Gruppe

Lapis Clas­sifica­tion

VIII/A.07-030

VIII: SILIKATE
A: Inselsilikate mit [SiO4] 4--Baugruppen
7: Kationen in oktaedrischer Koordination [6]

Clas­sifica­tion by Hölzel

9.AB.400

9: SILICATES
A: Nesosilicates
B: Olivine-Group

Dana 8th edi­tion

51.05.01.01

51: Nesosilicate Minerals
05: Nesosilicates Nesosilicate Insular SiO4 Groups Only with cations in >[6] coordination

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos, grau

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent bis durchscheinend

max. Birefrin­gence

0.023
Birefringence chart\! Larnite title=Birefringence chart Larnite

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

1.707

RI value β

1.715

RI value γ / ε

1.730

Ri mean

1.717

2V angle

Biaxial (+) 63°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell param­e­ters a (Å)

5.48

Cell param­e­ters b (Å)

6.76

Cell param­e­ters c (Å)

9.28

Cell param­e­ters a/b or c/a

0.811

Cell param­e­ters c/b

1.373

Cell param­e­ters α

90°

Cell param­e­ters β

94.55

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

342.692

X-Ray Pow­der Diffrac­tion

3.04(30),
2.756(100),
2.708(100),
2.67(30),
2.45(30),
2.25(30),
2.175(50),
1.973(50)
XRD chart Larnite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

6

VHN (Hard­ness Vick­ers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.28

3.338 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Säuren, + H2O

(Co-)Type locality

(Co-)Type locality

UK/Nordirland/Antrim Co./Larne/Scawt Hill

Preface

Author (Name, Year)

Tilley, 1929

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 449

Other languages

German

Larnit

Spanish

Larnita

English

Larnite

French

Larnite

Russian

Ларнит

Traditional Chinese

斜矽鈣石

Simplified Chinese

斜硅钙石

Alternative Name

Belit

Belita

Belite

Belith

Felit

Felita

Felite

β-C2S

CNMNC symbol

Symbol

Lrn

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

German pages

 DeWikiPedia - search for: Larnit
Google-Bilder-Suche - search for: Larnit
Mineralienatlas.de (Forum) - search for: Larnit

English pages

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

Russian pages

 Webmineral.ru - search for: Ларнит

Mineral Dealer

German pages

 hausen - Mineralgroßhandel - search for: Larnit
Crystal-Treasure.com - search for: Larnit
Bosse - search for: Larnit
Edelsteine Neuburg - Gundolf Fischer - search for: Larnit

Locations with GPS information