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Merwinite

Pictures (1 Images total)

Merwinit
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Merwinit
Gelbbraune schlierige Einschlüsse umschließen weiße Körner, BB = 6,1 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Rheinland-Pfalz, Deutschland.
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A031686, Donator: Willi Schüller
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Mayen/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Merwinite
Image: 1417636084
License: Usage for Mineralienatlas project only
Merwinit (SNr: A031686)

Gelbbraune schlierige Einschlüsse umschließen weiße Körner, BB = 6,1 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Rheinland-Pfalz, Deutschland.

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2014-12-03
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Collectors Summary

Color farblos, blassgrün
Streak color weiß
Hardness (Mohs) 6
Solubility +++ HCl
Crystal System monoklin, P21/a

Chemism

Chem­ical formula

Ca3Mg(SiO4)2

Chem­ical com­po­si­tion

Calcium, Magnesium, Silicium, Sauerstoff

Unit weight: 328.70676 u; Number of atoms in the formula: 14

Info

Empirical formula:

Ca3Mg(SiO4)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

38.94

8

57.14

15.9994300

127.9954400

Magnesium

Mg

7.39

1

7.14

24.3050600

24.3050600

Silicon

Si

17.09

2

14.29

28.0855300

56.1710600

Calcium

Ca

36.58

3

21.43

40.0784000

120.2352000

Anal­y­sis wt%

SiO2 : 35.50, Al2O3 : 0.66, CaO : 49.96, MgO : 11.62, FeO : 1.22 (Ref: American Mineralogist 21)

Strunz 9th edi­tion incl. updates

9.AD.15

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

Lapis Clas­sifica­tion

VIII/A.07-010

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

Clas­sifica­tion by Hölzel

9.AB.440

9: SILICATES
A: Nesosilicates
B: Olivine-Group

Dana 8th edi­tion

51.04.02.01

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

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos, blassgrün

Streak color

weiß

max. Birefrin­gence

0.016

Birefringence chart\! Merwinite title=Birefringence chart Merwinite

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

1.706

RI value β

1.712

RI value γ / ε

1.724

Ri mean

1.714

2V angle

Biaxial (+) 71°

Optical Data Luminescence

Color LW-UV (365nm)

 

orange

Color SW-UV (254nm)

 

gelb

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell param­e­ters a (Å)

13.254

Cell param­e­ters b (Å)

5.293

Cell param­e­ters c (Å)

9.328

Cell param­e­ters a/b or c/a

2.504

Cell param­e­ters c/b

1.762

Cell param­e­ters α

90°

Cell param­e­ters β

91.90

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

654.031

X-Ray Pow­der Diffrac­tion

4.70(50),
2.752(40),
2.674(100),
2.652(50),
2.452(80),
2.211(40),
2.031(30),
1.909(30)

XRD chart Merwinite

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)

3.15 (gemessen)

3.338 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ HCl

Preface

Author (Name, Year)

Larsen & Foshag, 1921

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 537

Other languages

German

Merwinit

Spanish

Merwinita

French

Merwinite

English

Merwinite

Russian

Мервинит

Simplified Chinese

镁硅钙石

Alternative Name

Simplified Chinese

镁蔷薇辉石

CNMNC symbol

Symbol

Mw

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Мервинит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Merwinit
Crystal-Treasure.com - search for: Merwinit
Bosse - search for: Merwinit
Edelsteine Neuburg - Gundolf Fischer - search for: Merwinit
Geolitho marketplace, by and for collectors - search for: Merwinit

Locations with GPS information