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Thorasphite (Thorasphit)

Collectors Summary

Color bräunlich rosa bis lachsrosa
Streak color weiß
Lustre Glasglanz
Crystal System orthorhombisch, Pbcn
Morphology prismatische bis nadelförmige Kristalle von bis zu 0,08 mm Länge und 0,002 mm Durchmesser [Typmaterial]

Chemism

Chemical formula

Th2H(PO4,AsO4)3·6H2O

Empirical formula (analysis)

Th1.72Fe2+0.11Al0.06Na0.05K0.04Ce0.01As1.51P1.53Si0.01O17.95Cl0.05H13.31

Chemical composition

Arsen, Thorium, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 874.162527428 u; Number of atoms in the formula: 36.35

Info

Empirical formula:

Th1.72Fe0.11Al0.06Na0.05K0.04Ce0.01As1.51P1.53Si0.01O17.95Cl0.05H13.31

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.53

13.31

36.62

1.0079470

13.4157746

Oxygen

O

32.85

17.95

49.38

15.9994300

287.1897685

Sodium

Na

0.13

0.05

0.14

22.9897702

1.1494885

Aluminium

Al

0.19

0.06

0.17

26.9815382

1.6188923

Silicon

Si

0.03

0.01

0.03

28.0855300

0.2808553

Phosphorus

P

5.42

1.53

4.21

30.9737612

47.3898546

Chlorine

Cl

0.20

0.05

0.14

35.4532000

1.7726600

Potassium

K

0.18

0.04

0.11

39.0983100

1.5639324

Iron

Fe

0.70

0.11

0.30

55.8452000

6.1429720

Arsenic

As

12.94

1.51

4.15

74.9216020

113.1316190

Cerium

Ce

0.16

0.01

0.03

140.1161000

1.4011610

Thorium

Th

45.66

1.72

4.73

232.0381100

399.1055492

Analysis wt%

ThO2 51.35,
Na2O 0.17,
K2O 0.20,
Al2O3 0.35,
FeO 0.90,
Ce2O3 0.27,
As2O5 19.65,
P2O5 12.27,
SiO2 0.08,
Cl 0.20,
H2O(calc) 13.58,
O=Cl –0.05,
Total 98.97 wt.%

Strunz 9th edition incl. updates

8

8: Phosphate, Arsenate, Vanadate
8:
8:

IMA status

anerkannt CNMNC Newsletter 41; Dezember 2017

Mineral status

anerkanntes Mineral

Optical Properties

Color

bräunlich rosa bis lachsrosa

Streak color

weiß

Lustre

Glasglanz

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

60

Space Group

Pbcn

Cell parameters a (Å)

13.673(3)

Cell parameters b (Å)

9.925(2)

Cell parameters c (Å)

10.222(2)

Cell parameters a/b or c/a

1.378

Cell parameters c/b

1.03

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

1387.172

Crystal structure

Neuer Strukturtyp; Struktur bestimmt

X-Ray Powder Diffraction

8.007(100), 5.127(57), 4.934(71), 4.320(24), 4.251(38), 3.225(22), 3.189(27), 2.926(27)

XRD chart Thorasphite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Morphology

prismatische bis nadelförmige Kristalle von bis zu 0,08 mm Länge und 0,002 mm Durchmesser [Typmaterial]

Physical Properties

Density (g/cm³)

4.185 (berechnet)

4.185 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Australien/New South Wales/Gough Co./Elsmore Hill/Anderson/Elsmore Tin Lodes

Type material

Typisches Material ist in den mineralogischen Sammlungen des South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australien, Registrierungsnummer G34702 hinterlegt.

Paragenesis of type material

Jarosit, in Matrix von Quarz und Muskowit

Preface

Name from

nach der Zusammensetzung, Thorium-Arsen-Phosphat.

Author (Name, Year)

Peter Elliot (2022)

References

Elliott, P. (2018) Thorasphite, IMA 2017-085. CNMNC Newsletter No. 41, February 2018, page xxx; Mineralogical Magazine, 82, xxx-xxx.

Peter Elliott - Thorasphite, Th2H(AsO4)2(PO4)·6H2O, a New Mineral from Elsmore, New South Wales, Australia - The Canadian Mineralogist (2022) 60 (4): 719–727.

Aaron J. Celestian: New Mineral Names: Arsenic and Lead. American Mineralogist Vol. 108, Nr. 3 (2023) S. 634–636.

Other languages

German

Thorasphit

English

Thorasphite

CNMNC (IMA)-Number

IMA 2017-085

CNMNC symbol

Symbol

Tp

Locations with GPS information

IDs

GUSID (Global unique identifier short form) a7QAA0xSJ0qTgJ04q8d9oQ
GUID (Global unique identifier) 0300B46B-524C-4A27-9380-9D38ABC77DA1
Database ID 8477