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Altisite (Altisit)

Additional Functions

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 6
Cleavages keine
Fracture muschelig
Solubility - 10% HCl, HNO3
Crystal System monoklin, C2/m

Chemism

Chemical formula

(K,Na)6Na3Ti2[Cl3|Al2Si8O26]

Chemical composition

Aluminium, Chlor, Natrium, Silicium, Titan, Kalium, Sauerstoff

Unit weight: 1176.1226573 u; Number of atoms in the formula: 50

Info

Empirical formula:

(K0.75Na0.25)6Na3Ti2[Cl3Al2Si8O26]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

35.37

26

52.00

15.9994300

415.9851800
Sodium

Na

8.80

4.5

9.00

22.9897702

103.4539659
Aluminium

Al

4.59

2

4.00

26.9815382

53.9630764
Silicon

Si

19.10

8

16.00

28.0855300

224.6842400
Chlorine

Cl

9.04

3

6.00

35.4532000

106.3596000
Potassium

K

14.96

4.5

9.00

39.0983100

175.9423950
Titanium

Ti

8.14

2

4.00

47.8671000

95.7342000

Analysis wt%

SiO2 : 40.30, Nb2O5 : 0.50, TiO2 : 13.10, Al2O3 : 8.70, BaO : 1.00, Na2O : 9.30, K2O : 20.70, Cl : 8.60 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 94)

Strunz 9th edition incl. updates

9.DP.40

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
P: Übergangsstrukturen: Ketten- und Bandsilikate - Schichtsilikat
40:Altisit-Gruppe

Lapis Classification

VIII/G.09-005

VIII: SILIKATE
G: Übergangsstrukturen zwischen Ketten- und Schichtsilikaten

Classification by Hölzel

9.DS.250

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
S: ~[Si8O20]8--.. or ~[Si8O22]12--... Cylinder-Chains Narsarsukite-Group

Dana 8th edition

74.03.03.01

74: Phyllosilicates Phyllosilicate Modulated Layers
03: Phyllosilicates Phyllosilicate Modulated Layers with joined strips
03: Altisite/lemoynite

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefringence

0.053
Birefringence chart\! Altisite title=Birefringence chart Altisite

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

1.601

RI value β

1.625

RI value γ / ε

1.654

Ri mean

1.627

2V angle

Biaxial (+) 85°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

10.363

Cell parameters b (Å)

16.310

Cell parameters c (Å)

9.132

Cell parameters a/b or c/a

0.635

Cell parameters c/b

0.56

Cell parameters α

90°

Cell parameters β

105.33

Cell parameters γ

90°

Z

2

Volumne (ų)

1488.577

X-Ray Powder Diffraction

8.22(70),
3.50(40),
3.157(30),
3.049(100),
2.900(70),
2.835(80),
1.996(30),
1.967(30)
XRD chart Altisite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.64 (gemessen)

2.624 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

muschelig

Tenacity

spröde

Instability

- 10% HCl, HNO3

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Olenii (Oleny) Ruchei

Preface

Author (Name, Year)

Khomyakov & Nechelyustov & Ferraris & Ival'di, 1994

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 123 (1994) (6), 82

Other languages

German

Altisit

Spanish

Altisita

French

Altisite

English

Altisite

Russian

Алтисит

CNMNC (IMA)-Number

IMA 1993-055

CNMNC symbol

Symbol

Ati