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Titanoholtite (IMA 2012-069)

Collectors Summary

Crystal System orthorhombisch, Pnma

Chemism

Chemical formula

(Ti0.750.25)Al6BSi3O18

Additional chem. information

Dumortierit-Supergruppe

Chemical composition

Aluminium, Silicium, Titan, Bor, Sauerstoff, Vakanz

Unit weight: 580.8475842025 u; Number of atoms in the formula: 29

Info

Empirical formula:

(Ti0.75Vc0.25)Al6BSi3O18

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

0.25

0.86

0.0000000

0.0000000

Boron

B

1.86

1

3.45

10.8117000

10.8117000

Oxygen

O

49.58

18

62.07

15.9994300

287.9897400

Aluminium

Al

27.87

6

20.69

26.9815382

161.8892292

Silicon

Si

14.51

3

10.34

28.0855300

84.2565900

Titanium

Ti

6.18

0.75

2.59

47.8671000

35.9003250

Strunz 9th edition incl. updates

9.AJ.10

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
J: Insel(Neso)silikate mit BO3 Triangeln und /oder B[4], Be[4] Tetraedern, eckenteilend mit SiO4
10:Dumortierit-Gruppe

Lapis Classification

VIII/B.31-028

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
31: Kationen mit Koordinationszahlen zwischen [8] und [12]; Beryllium- und Bor-Inselsilikate

IMA status

anerkannt - Neue Mineralien Feb. 2013; CNMNC Newsletter No. 15

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Dumortierite supergroup  ⇒ Holtite group

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnma

Cell parameters a (Å)

4.7001

Cell parameters b (Å)

11.828

Cell parameters c (Å)

20.243

Cell parameters a/b or c/a

0.397

Cell parameters c/b

1.711

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Volume (ų)

1125.365

X-Ray Powder Diffraction

10.213(46), 5.914(47), 5.861(78), 3.458(63), 3.231(100), 3.068(53), 2.931(59), 2.895(65)

XRD chart Titanoholtite

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

(Co-)Type locality

(Co-)Type locality

Polen/Niederschlesien (Dolnoslaskie), Woiwodschaft/Frankenstein (Zabkowicki Slaskie), Powiat/Frankenstein (Zabkowice Sląskie)/Gläsendorf (Szklary)/Gläsendorf (Szklary) Pegmatit

Type material

Mineralogical Museum of the University of Wroclaw, Wroclaw, Poland;
Smithsonian Institution, Washington DC, USA

Collection number of type material

MMWr IV7617; Cotype MMWr IV7620 und MMWr IV7621 (Polen)
NMNH 175986, NMNH 175987 und NMNH 17598

Preface

Author (Name, Year)

Adam Pieczka, R. James Evans, Edward S. Grew, Lee A. Groat, Chi Ma und George R. Rossman (2013)

References

Pieczka, A., Evans, R.J., Grew, E.S., Groat, L.A., Ma, C. and Rossman, G.R. (2013) Titanoholtite, IMA 2012-069. CNMNC Newsletter No. 15, February 2013, page 7; Mineralogical Magazine, 77, 112.

IMA group assignments


 
 
 
 
 

 
 
 
(Ta0.60.4)Al6BSi3O18
orthorhombisch
Pnma

 
 
 
(Nb0.60.4)Al6BSi3O18
orthorhombisch
Pnma

 
 
 
(Ti0.750.25)Al6BSi3O18
orthorhombisch
Pnma

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Actuality: 23. Mar 2024 - 03:14:39

Other languages

German

Titanoholtit

English

Titanoholtite

CNMNC (IMA)-Number

IMA 2012-069

CNMNC symbol

Symbol

Thlt

Locations with GPS information

IDs

GUSID (Global unique identifier short form) KhJY2pz-tkuLMbOrgkPN3w
GUID (Global unique identifier) DA58122A-FE9C-4BB6-8B31-B3AB8243CDDF
Database ID 7529