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Fluoro-pedrizite

Collectors Summary

Color blass-blau
Streak color weiß
Hardness (Mohs) 5.5
Cleavages vollkommen (110), teilbat (100)(001)
Crystal System monoklin, C2/m

Additional information / Summary

Fluor-Pedrizit wurde ursprünglich aus dem Material des Holotypus von Klino-Holmquistit durch Oberti et. al 2005 (IMA 2004-002) beschrieben als Fluoro-sodicpedrizite.

Eingehende Analysen zeigten, dass die Probe aus einer Mischung von zwei verschiedenen Zusammensetzungen von Amphibol, Tremolite und einem neuen Amphibol-Endglied dem Fluor-Natrium-Pedrizit bestand.

Chemism

Chem­ical formula

NaLi2(Mg2Al2Li)Si8O22F2

Addi­tional chem. informa­tion

Amphibol-Gruppe

Chem­ical com­po­si­tion

Aluminium, Lithium, Magnesium, Natrium, Silicium, Fluor, Sauerstoff

Unit weight: 761.0550731 u; Number of atoms in the formula: 40

Info

Empirical formula:

NaLi2(Mg2Al2Li)Si8O22F2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Lithium

Li

2.74

3

7.50

6.9412000

20.8236000

Oxygen

O

46.25

22

55.00

15.9994300

351.9874600

Fluorine

F

4.99

2

5.00

18.9984033

37.9968065

Sodium

Na

3.02

1

2.50

22.9897702

22.9897702

Magnesium

Mg

6.39

2

5.00

24.3050600

48.6101200

Aluminium

Al

7.09

2

5.00

26.9815382

53.9630764

Silicon

Si

29.52

8

20.00

28.0855300

224.6842400

Strunz 9th edi­tion incl. updates

9.DE.25

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
E: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Klinoamphibole
25:Amphibole: Alkali

Lapis Clas­sifica­tion

VIII/F.08-085

VIII: SILIKATE
F: Ketten- und Bandsilikate
8: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Alkali-Amphibole

Clas­sifica­tion by Hölzel

9.DF.450

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
F: Amphiboles; Orthorhombic Amphiboles
4: Pedrizite-Group

IMA sta­tus

anerkannt 2004, umbenannt anerkannt 2012

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Lithium amphiboles  ⇒ Pedrizite (Ped) amphiboles

Optical Properties

Color

blass-blau

Streak color

weiß

max. Birefrin­gence

0.023

Birefringence chart\! Fluoro-pedrizite title=Birefringence chart Fluoro-pedrizite

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

1.610

RI value β

1.627

RI value γ / ε

1.633

Ri mean

1.623

2V angle

Biaxial (-) 58° (gemessen) 61° (berechnet)

Pleochro­ism

schwach, farblos zu hellbraun

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

9.368

Cell param­e­ters b (Å)

17.616

Cell param­e­ters c (Å)

5.271

Cell param­e­ters a/b or c/a

0.532

Cell param­e­ters c/b

0.299

Cell param­e­ters α

90°

Cell param­e­ters β

102.38

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

849.629

X-Ray Pow­der Diffrac­tion

8.12(70), 4.404(70), 3.375(50), 3.005(80), 2.873(30), 2.679(100), 2.483(50), 2.133(30)

XRD chart Fluoro-pedrizite

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)

5.5

VHN (Hard­ness Vick­ers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3 (gemessen) 3.05 (berechnet)

2.975 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen (110), teilbat (100)(001)

Tenac­ity

spröde

Preface

Name from

als Mitglied der Predrizit-Gruppe

References

American Mineralogist 90 (2005), 732

Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch (2012): Nomenclature of the amphibole supergroup, American Mineralogist, Volume 97, pages 2031–2048

IMA group assignments

Other languages

German

Fluoro-Pedrizit

English

Fluoro-pedrizite

Russian

Фторнатропедрисит

Russian

Фторпедрицит

old name

German

Fluor-Natriumpedrizit (2005)

English

Fluoro-sodicpedrizite (2005)

Alternative Name

German

Fluoronatriumpedrizit

German

Fluoropedrizit

Lapis-Mineralienverzeichnis

CNMNC (IMA)-Number

IMA 2004-002

CNMNC symbol

Symbol

Flpd

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Фторнатропедрисит

Mineral Dealer

German pages

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

Locations with GPS information