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Milarite (Milarit)

Pictures (129 Images total)

Milarit
Views (File:
1167317128
): 6343, Rating: 9.4
Milarit
Bildbreite: 5 mm; Fundort: Schijenstock, Uri, Schweiz
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Schweiz/Uri, Kanton/Göschenen/Riental/Schijenstock (Schyenstock; Schirstock)
Mineral: Milarite
Image: 1167317128
Rating: 9.4 (votes: 10)
License: Usage for Mineralienatlas project only
Milarit

Bildbreite: 5 mm; Fundort: Schijenstock, Uri, Schweiz

Copyright: Stephan Wolfsried
Contribution: Hg 2006-12-28
Locality: Schijenstock (Schyenstock; Schirstock) / Riental / Göschenen / Uri, Kanton / Schweiz
Milarit
Views (File:
1246096927
): 3229, Rating: 8.86
Milarit
Bildbreite: 1,6 mm; Fundort: Cantera Venero 1, Cadaloso de los Vidrios, Madrid, Spanien
Copyright: Christian Rewitzer; Contribution: Hg
Location: Spanien/Comunidad de Madrid/Cadalso de los Vidrios/Cantera Venero 1
Mineral: Milarite
Image: 1246096927
Rating: 8.86 (votes: 7)
License: Usage for Mineralienatlas project only
Milarit

Bildbreite: 1,6 mm; Fundort: Cantera Venero 1, Cadaloso de los Vidrios, Madrid, Spanien

Copyright: Christian Rewitzer
Contribution: Hg 2009-06-27
Locality: Cantera Venero 1 / Cadalso de los Vidrios / Comunidad de Madrid / Spanien
Milarit
Views (File:
1165231930
): 3641, Rating: 9.25
Milarit
Bildbreite: 8 mm; Fundort Val Giuv, Tavetsch, Graubünden, Schweiz
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Schweiz/Graubünden, Kanton/Surselva, Region/Tujetsch (Tavetsch)/Sedrun/Val Giuv (Val Giuf)
Mineral: Milarite
Image: 1165231930
Rating: 9.25 (votes: 4)
License: Usage for Mineralienatlas project only
Milarit

Bildbreite: 8 mm; Fundort Val Giuv, Tavetsch, Graubünden, Schweiz

Copyright: Stephan Wolfsried
Contribution: Hg 2006-12-04
Locality: Val Giuv (Val Giuf) / Sedrun / Tujetsch (Tavetsch) / Surselva, Region / Graubünden, Kanton / Schweiz
Milarit
Views (File:
1269043092
): 1423
Milarit
Bildbreite: 2,5 mm; Fundort: Schijenstock (Schyenstock; Schirstock), Riental, Reusstal, Uri, Schweiz
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Schweiz/Uri, Kanton/Göschenen/Riental/Schijenstock (Schyenstock; Schirstock)
Mineral: Milarite
Image: 1269043092
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
Milarit

Bildbreite: 2,5 mm; Fundort: Schijenstock (Schyenstock; Schirstock), Riental, Reusstal, Uri, Schweiz

Copyright: Stephan Wolfsried
Contribution: Hg 2010-03-20
Locality: Schijenstock (Schyenstock; Schirstock) / Riental / Göschenen / Uri, Kanton / Schweiz
Milarit
Views (File:
1389346039
): 2236
Milarit
Bildbreite: 2,5 mm. Fundort Val Giuv, Sedrun, Tujetsch, Graubünden, Schweiz
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Schweiz/Graubünden, Kanton/Surselva, Region/Tujetsch (Tavetsch)/Sedrun/Val Giuv (Val Giuf)
Mineral: Milarite
Image: 1389346039
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Milarit

Bildbreite: 2,5 mm. Fundort Val Giuv, Sedrun, Tujetsch, Graubünden, Schweiz

Copyright: Stephan Wolfsried
Contribution: Hg 2014-01-10
Locality: Val Giuv (Val Giuf) / Sedrun / Tujetsch (Tavetsch) / Surselva, Region / Graubünden, Kanton / Schweiz
Milarit xx
Views (File:
1330162466
): 812
Milarit xx
Windtal,Ahrntal/Südtirol,Italien; Grösse ca. 5mm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Italien/Trentino-Südtirol (Trentino-Alto Adige), Region/Südtirol (Bozen), Provinz/Ahrntal/Windtal (Valle del Vento)
Mineral: Milarite
Image: 1330162466
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Milarit xx

Windtal,Ahrntal/Südtirol,Italien; Grösse ca. 5mm

Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2012-02-25
Locality: Windtal (Valle del Vento) / Ahrntal / Südtirol (Bozen), Provinz / Trentino-Südtirol (Trentino-Alto Adige), Region / Italien

You find additional Milarit specimen at the Geolitho Museum

Collectors Summary

Color farblos, weiß, grünlichweiß, gelblich weiß
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 5.75
Fracture muschelig, uneben
Solubility +++ HF, - HCl
Crystal System hexagonal, P6/mcc

Chemism

Chemical formula

KCa2(Be2AlSi12)O30·H2O

Chemical composition

Aluminium, Beryllium, Calcium, Silicium, Kalium, Sauerstoff, Wasserstoff

Unit weight: 999.2855968 u; Number of atoms in the formula: 51

Info

Empirical formula:

KCa2(Be2AlSi12)O30·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.20

2

3.92

1.0079470

2.0158940

Beryllium

Be

1.80

2

3.92

9.0121823

18.0243646

Oxygen

O

49.63

31

60.78

15.9994300

495.9823300

Aluminium

Al

2.70

1

1.96

26.9815382

26.9815382

Silicon

Si

33.73

12

23.53

28.0855300

337.0263600

Potassium

K

3.91

1

1.96

39.0983100

39.0983100

Calcium

Ca

8.02

2

3.92

40.0784000

80.1568000

Analysis wt%

SiO2 : 71.66, Al2O3 : 4.68, BeO : 5.24, CaO : 11.70, K2O : 4.91, Na2O : 0.46, H2O : 1.07 (Ref: American Mineralogist 31)

Strunz 9th edition incl. updates

9.CM.05

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
M: ~[Si6O18]12- sechser-Doppelringe
05:Milarit-Gruppe

Lapis Classification

VIII/E.22-015

VIII: SILIKATE
E: Ringsilikate
22: Doppelte Sechserringe [Si12O30] 12-; Milarit/Osumilith-Gruppe

Classification by Hölzel

9.CF.100

9: SILICATES
C: Cyclosilicates
F: ~[Si12O30]12--Rings Milarite-Group

Dana 8th edition

63.02.01a.12

63: Cyclosilicates Cyclosilicate Condensed Rings
02: Cyclosilicates Cyclosilicate Condensed Rings 6-membered rings
01a: Milarite - Osumilite group (Milarite - Osumilite subgroup)

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Osumilite Group

Optical Properties

Color

farblos, weiß, grünlichweiß, gelblich weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

Lustre

Glasglanz

max. Birefringence

0.003

Birefringence chart\! Milarite title=Birefringence chart Milarite

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

1.532

RI value γ / ε

1.529

Ri mean

1.531

2V angle

Uniaxial (-), abnormal auch Biaxial

Optical Data Luminescence

Luminescence

fluoreszierend

Color LW-UV (365nm)

 

bläulich weiß

LW-UV Intensity

schwach

MW-UV (320nm)

 

bläulich weiß

Color SW-UV (254nm)

 

bläulich weiß

SW-UV Intensity

schwach

LW-UV Other Colors

 

grün

SW-UV Other Colors

 

grün

Most Common Activator

Ce3+

Other Activators

Eu2+, Mn2+

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

hexagonal

Class (H-M)

6/mmm

Space Group number

192

Space Group

P6/mcc

Cell parameters a (Å)

10.45

Cell parameters b (Å)

-

Cell parameters c (Å)

13.88

Cell parameters a/b or c/a

1.328

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volumne (ų)

1312.661

X-Ray Powder Diffraction

5.22(40),
4.16(50),
3.777(20),
3.456(20),
3.316(100),
3.227(20),
2.882(70),
2.745(50)

XRD chart Milarite

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)

5.75

VHN (Hardness Vickers)

630 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.56 (gemessen) 2.565 (berechnet)

2.528 ( ρ calc. Mineralienatlas )

Fracture

muschelig, uneben

Tenacity

spröde

Instability

+++ HF, - HCl

Preface

Occurrences

in hydrothermalen, alpinen Niedertemperatur Adern, in Aplit-, Syenit- und Granit-Pegmatiten

Author (Name, Year)

Kenngott, 1870

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 541

IMA group assignments


 
 
YCaKBe3Si12O30·H2O
hexagonal
P6/mcc

 
 
(K,Na)(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30]
hexagonal
P6/mcc

 
 
KNa2Al2Li3Si12O30
hexagonal
P6/mcc

 
 
BaCa2Al6Si9O30·2 H2O
orthorhombisch
Pnc2

 
 
KLi3Ti2[Si12O30]
hexagonal
P6/mcc

 
 
KSn2Li3Si12O30
hexagonal
P6/mcc

 
 
KNa2Li(Mn,Zn)2ZrSi12O30
hexagonal
P6/mcc

 
 
K(K,Na)2(Zn,Li)3(Mn2+,Mn3+,Y,Zr)2[Si12O30]
hexagonal
P6/mcc

 
 
KNa3Mg4Si12O30
hexagonal
P6/mcc

 
 
K(☐Na)Mg2(Be2Mg)Si12O30
hexagonal
P6/mcc

 
 
KNaFe2Zn3[Si12O30]
hexagonal
P63/mmc

 
 
Mg2K(Be2Al)Si12O30
hexagonal
P6/mcc

 
 
(K,Na)2(Fe2+,Mg)5Si12O30
hexagonal
P6/mcc

 
 
KCa2(Be2AlSi12)O30·H2O
hexagonal
P6/mcc

 
 
(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30
hexagonal
P6/mcc

 
 
KMg2Al3(Al2Si10)O30
hexagonal
P6/mcc

 
 
KNa2B3Si12O30
hexagonal
P6/mcc

 
 
KNaMg2(Mg3Si12)O30
hexagonal
P62c

 
 
K<3(Ca,Mn,Na)2Zn3[Si12O30]
hexagonal
P6/mcc

 
 
(K,Na)2(Li,Fe3+,Al)3ZrSi12O30
hexagonal
P6/mcc

 
 
KNa2(Fe2+,Mn2+,Al)2Li3Si12O30
hexagonal
P6/mmc

 
 
(Fe,Mg)2(Mg,Fe)3(Si12O30)
hexagonal
P6/mcc

 
 
NaMg2(AlMg2Si12)O30
hexagonal
P6/mcc

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Actuality: 30. Mar 2023 - 17:51:48

Other languages

German

Milarit

Spanish

Milarita

French

Milarite

English

Milarite

Russian

Миларит

Simplified Chinese

整柱石

Traditional Chinese

鈹鈣大隅石

Simplified Chinese

铍钙大隅石

CNMNC symbol

Symbol

Mil

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