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Poudretteite (Poudretteit)

Pictures (1 Images total)

Poudretteit
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Poudretteit
Größe: 0,9 x 0,6 x 0,5 cm, Fundort: Mogok, Sagaing, Mandalay Division, Myanmar
Copyright: Rob Lavinsky; Contribution: thdun5
Location: Myanmar (Burma)/Mandalay-Division/Pyin-Oo-Lwin, Distrikt/Mogok Township
Mineral: Poudretteite
Image: 1303770818
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Poudretteit

Größe: 0,9 x 0,6 x 0,5 cm, Fundort: Mogok, Sagaing, Mandalay Division, Myanmar
Copyright: Rob Lavinsky
Contribution: thdun5 2011-04-26
Locality: Mogok Township / Pyin-Oo-Lwin, Distrikt / Mandalay-Division / Myanmar (Burma)

Collectors Summary

Color farblos, hellrosa
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 5
Crystal System hexagonal, P6/mcc

Chemism

Chemical formula

KNa2B3Si12O30

Chemical composition

Natrium, Silicium, Bor, Kalium, Sauerstoff

Unit weight: 934.5222104 u; Number of atoms in the formula: 48

Info

Empirical formula:

KNa2B3Si12O30

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Boron

B

3.47

3

6.25

10.8117000

32.4351000
Oxygen

O

51.36

30

62.50

15.9994300

479.9829000
Sodium

Na

4.92

2

4.17

22.9897702

45.9795404
Silicon

Si

36.06

12

25.00

28.0855300

337.0263600
Potassium

K

4.18

1

2.08

39.0983100

39.0983100

Analysis wt%

SiO2 : 77.70, B2O3 : 11.40, K2O : 5.20, Na2O : 6.20 (Ref: Canadian Mineralogist 87)

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.22-010

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

Classification by Hölzel

9.CF.360

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

Dana 8th edition

63.02.01a.08

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

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Osumilite Group

Optical Properties

Color

farblos, hellrosa

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.016
Birefringence chart\! Poudretteite title=Birefringence chart Poudretteite

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

1.516

RI value γ / ε

1.532

Ri mean

1.521

2V angle

Uniaxial (+)

Crystallography

Crystal System

hexagonal

Class (H-M)

6/mmm

Space Group number

192

Space Group

P6/mcc

Cell parameters a (Å)

10.239

Cell parameters b (Å)

-

Cell parameters c (Å)

13.485

Cell parameters a/b or c/a

1.317

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volumne (ų)

1224.325

X-Ray Powder Diffraction

6.74(30),
5.13(100),
4.07(30),
3.70(30),
3.253(100),
2.956(40),
2.815(60),
2.686(50)
XRD chart Poudretteite

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

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.51

2.535 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Kanada/Québec/Montérégie, Region/La Vallée-du-Richelieu RCM/Mont Saint-Hilaire/Poudrette Quarry (Demix Quarry; Uni-Mix Quarry; Desourdy Quarry)

Paragenesis of type material

Pektolith, Apophyllit, Aegirin

Preface

Rareness

Vom Poudrette-Steinbruch, Mont Saint-Hilaire wurden bisher nur 7 Kristalle (bis 5mm) gefunden.

Name from

Fam. Poudrette, welche den Steinbruch betreibt.

Author (Name, Year)

Grice & Ercit & Van Velthuizen & Dunn, 1987

References

Canadian Mineralogist 25 (1987), 763

IMA group assignments

Other languages

German

Poudretteit

English

Poudretteite

French

Poudretteite

Spanish

Poudretteíta

Russian

Пудреттит

Simplified Chinese

硼碱大隅石

CNMNC (IMA)-Number

IMA 1986-028

CNMNC symbol

Symbol

Pou

Locations with GPS information