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Parafransoletite (Parafransoletit)

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Parafransoletit
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Parafransoletit
Parafransoletit (farblos) auf Montgomeryit (rot). Kristallgröße: 0,2 mm, Fundort: Tip Top Mine, Fourmile, Custer Distrikt, Custer Co., South Dakota, USA
Copyright: Jason B. Smith; Contribution: thdun5
Location: USA/South Dakota/Custer Co./Custer District/Fourmile/Tip Top Mine
Mineral: Parafransoletite
Image: 1275727011
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Parafransoletit

Parafransoletit (farblos) auf Montgomeryit (rot). Kristallgröße: 0,2 mm, Fundort: Tip Top Mine, Fourmile, Custer Distrikt, Custer Co., South Dakota, USA

Copyright: Jason B. Smith
Contribution: thdun5 2010-06-05
Locality: Tip Top Mine / Fourmile / Custer District / Custer Co. / South Dakota / USA

Collectors Summary

Color farblos, weiß
Streak color weiß
Hardness (Mohs) 2.5
Cleavages keine
Fracture eben
Solubility +++ HCl 1:1
Crystal System triklin, P1

Chemism

Chemical formula

Ca3Be2(PO4)2(PO3OH)2·4H2O

Chemical composition

Beryllium, Calcium, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 592.2226794 u; Number of atoms in the formula: 39

Info

Empirical formula:

Ca3Be2(PO4)2(PO3OH)2·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.70

10

25.64

1.0079470

10.0794700

Beryllium

Be

3.04

2

5.13

9.0121823

18.0243646

Oxygen

O

54.03

20

51.28

15.9994300

319.9886000

Phosphorus

P

20.92

4

10.26

30.9737612

123.8950448

Calcium

Ca

20.30

3

7.69

40.0784000

120.2352000

Analysis wt%

CaO : 28.20, BeO : 7.70, P2O5 : 47.90, H2O : 15.10 (Ref: American Mineralogist 92)

Strunz 9th edition incl. updates

8.CA.05

8: Phosphate, Arsenate, Vanadate
C: Phosphate ohne weitere Anionen, mit H2O
A: Mit kleinen und großen/mittelgroßen [Kationen]
05:Fransoletit-Gruppe

Lapis Classification

VII/C.03-015

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
C: Wasserhaltige Phosphate, ohne fremde Anionen
3: Kleine und mittelgroße Kationen: Be und Al-Mn-Fe-Cu-Zn-Mg

Classification by Hölzel

8.CA.410

8: PHOSPHATES ARSENATES VANADATES
C: Phosphates (-Anions +Water)
A: Phosphates, C small

Dana 8th edition

40.05.02.01

40: Hydrated Phosphates, etc
05: Hydrated Phosphates, etc with miscellaneous formulae

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, weiß

Streak color

weiß

max. Birefringence

0.026

Birefringence chart\! Parafransoletite title=Birefringence chart Parafransoletite

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

1.562

RI value β

1.564

RI value γ / ε

1.588

Ri mean

1.571

2V angle

Biaxial (+) 33°

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

7.327

Cell parameters b (Å)

7.696

Cell parameters c (Å)

7.061

Cell parameters a/b or c/a

0.952

Cell parameters c/b

0.917

Cell parameters α

94.90

Cell parameters β

96.82

Cell parameters γ

101.87

Z

1

Volumne (ų)

384.409

X-Ray Powder Diffraction

7.52(50),
3.619(80),
3.360(20),
3.032(100),
2.595(60),
2.485(20),
2.334(40),
1.870(20)

XRD chart Parafransoletite

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)

2.5

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.54 (gemessen)

2.558 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

eben

Tenacity

spröde

Instability

+++ HCl 1:1

Preface

Author (Name, Year)

Kampf & Dunn & Foord, 1992

References

American Mineralogist 77 (1992), 843

Other languages

German

Parafransoletit

Spanish

Parafransoletita

English

Parafransoletite

French

Parafransoletite

Russian

Парафрансолетит

Alternative Name

German

Parafransoleit

Spanish

Parafransoleita

Parafransoleite

CNMNC (IMA)-Number

IMA 1989-049

CNMNC symbol

Symbol

Pfsl

Locations with GPS information