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Svyatoslavite

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 6
Crystal System orthorhombisch, P21212

Chemism

Chemical formula

CaAl2Si2O8

Chemical composition

Aluminium, Calcium, Silicium, Sauerstoff

Unit weight: 278.2079764 u; Number of atoms in the formula: 13

Info

Empirical formula:

CaAl2Si2O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

46.01

8

61.54

15.9994300

127.9954400

Aluminium

Al

19.40

2

15.38

26.9815382

53.9630764

Silicon

Si

20.19

2

15.38

28.0855300

56.1710600

Calcium

Ca

14.41

1

7.69

40.0784000

40.0784000

Analysis wt%

Ø SiO2 : 43.57, Al2O3 : 35.32, CaO : 19.24, Na2O : 0.43 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 89)

Strunz 9th edition incl. updates

9.FA.45

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
A: Gerüstsilikate (Tektosilicates) ohne weitere [Anionen]
45:Svyatoslavit-Gruppe

Lapis Classification

VIII/J.07-080

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
7: Ohne tetraederfremde Anionen; Feldspat-Gruppe

Classification by Hölzel

9.FC.220

9: SILICATES
F: Tektosilicates
C: Feldspar-Group

Dana 8th edition

76.01.06.04

76: Tektosilicates Tectosilicate Al-Si Framework
01: Tektosilicates Tectosilicate Al-Si Framework with Al-Si frameworks
06: Banalsite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Feldspar group

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.029

Birefringence chart\! Svyatoslavite title=Birefringence chart Svyatoslavite

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

1.552

RI value β

1.578

RI value γ / ε

1.581

Ri mean

1.570

2V angle

Biaxial (-) 37°

Optical Data Luminescence

Color LW-UV (365nm)

 

gelblich

LW-UV Intensity

schwach

Color SW-UV (254nm)

 

gelblich

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

orthorhombisch

Class (H-M)

222

Space Group number

18

Space Group

P21212

Cell parameters a (Å)

8.220

Cell parameters b (Å)

8.951

Cell parameters c (Å)

4.828

Cell parameters a/b or c/a

0.918

Cell parameters c/b

0.539

Cell parameters α

90°

Cell parameters β

90.0

Cell parameters γ

90°

Z

2

Volumne (ų)

355.231

X-Ray Powder Diffraction

4.16(80),
3.75(60),
3.22(100),
2.94(60),
2.71(70),
2.09(80),
1.967(70),
1.670(70)

XRD chart Svyatoslavite

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)

6

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.695

2.601 ( ρ calc. Mineralienatlas )

Preface

Rareness

Sehr selten

Author (Name, Year)

Chesnokov & Lotova & Pavlyuchenko & Usova & Bushmakin & Nishanbayev, 1

Additional Information

Feldspat-Gruppe (Anorthoklas-Anorthit-Banalsit-Serie)

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 118 (2) (1989), 111

IMA group assignments


 
 
 
 
 

 
 
 
(Na,K)AlSi3O8
triklin
C1

 
 
 
(NH4)AlSi3O8·0.5 H2O
monoklin
P21, P21/m

 
 
 
BaAl2Si2O8
monoklin
I2/c

 
 
 
(K,Ba)Al(Si,Al)3O8
monoklin
C2/m

 
 
 
KAlSi3O8
triklin
C1

 
 
 
KAlSi3O8
monoklin
C2/m

 
 
 
(Rb,K)[AlSi3O8]
triklin
P1

 
 
 
(K,Na)(Si,Al)4O8
monoklin
C2/m

 
 
BaNa2Al4Si4O16
orthorhombisch
Iba2

 
 
CaAl2Si2O8
hexagonal
P6/mmm

 
 
K[(Al,Zn)2(As,Si)2O8]
monoklin
I2/c

 
 
KAlSi3O8
hexagonal
P6/mmm

 
 
(Na,Ca)AlSi3O8
tetragonal
I4/m

 
 
BaAl2Si2O8
monoklin
P21/a

 
 
 
 
 

 
 
 
NaAlSi3O8
triklin
C1

 
 
 
(Na,Ca)(Si,Al)4O8
triklin
P1

 
 
 
CaAl2Si2O8
triklin
P1

 
 
 
(Ca,Na)(Si,Al)4O8
triklin
I1

 
 
 
(Ca,Na)(Si,Al)4O8
triklin
C1

 
 
 
(Na,Ca)(Si,Al)4O8
triklin
C1

 
 
NaBSi3O8
triklin
C1

 
 
(Sr,Ca)Al2Si2O8
monoklin
P21/a

 
 
SrNa2Al4Si4O16
orthorhombisch
Iba2

 
 
CaAl2Si2O8
orthorhombisch
P21212

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Actuality: 31. Jan 2023 - 12:53:38

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French

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Russian

Святославит

CNMNC (IMA)-Number

IMA 1988-012

CNMNC symbol

Symbol

Svy

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