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Tsepinite-Sr

Pictures (1 Images total)

Tsepinit-Sr
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1577197393
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Tsepinit-Sr
weiße/farblose Aggreagte von Tsepinit-Sr, Eveslogchorr, Chibiny, Kola-Halbinsel, Russland; BB ~ 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Eweslogchorr (Eveslogchorr)
Mineral: Tsepinite-Sr
Image: 1577197393
License: Usage for Mineralienatlas project only
Tsepinit-Sr

weiße/farblose Aggreagte von Tsepinit-Sr, Eveslogchorr, Chibiny, Kola-Halbinsel, Russland; BB 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2019-12-24
Locality: Eweslogchorr (Eveslogchorr) / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color farblos, weiß
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 5
Cleavages keine
Fracture uneben
Crystal System monoklin, Cm

Chemism

Chemical formula

(Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2·3H2O

Additional chem. information

Labuntsovit-Supergruppe Gruppe

Chemical composition

Barium, Niob, Silicium, Strontium, Titan, Kalium, Sauerstoff, Wasserstoff

Unit weight: 607.8266145 u; Number of atoms in the formula: 31.5

Info

Empirical formula:

(Sr0.6Ba0.3K0.1)(Ti0.75Nb0.25)2(Si4O12)((OH)0.75O0.25)2·3H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.24

7.5

23.81

1.0079470

7.5596025
Oxygen

O

44.75

17

53.97

15.9994300

271.9903100
Silicon

Si

18.48

4

12.70

28.0855300

112.3421200
Potassium

K

0.64

0.1

0.32

39.0983100

3.9098310
Titanium

Ti

11.81

1.5

4.76

47.8671000

71.8006500
Strontium

Sr

8.65

0.6

1.90

87.6210000

52.5726000
Niobium

Nb

7.64

0.5

1.59

92.9063820

46.4531910
Barium

Ba

6.78

0.3

0.95

137.3277000

41.1983100

Analysis wt%

SiO2 : 41.89, Nb2O5 : 16.07, TiO2 : 18.49, CaO : 0.92, SrO : 5.12, BaO : 4.27, K2O : 1.30, Na2O : 0.61, H2O : 11.14 (Ref: New Data on Minerals, (Monatshefte) 2005)

Strunz 9th edition incl. updates

9.CE.30

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
E: [Si4O12]8- vierer-Einfachringe, ohne inselartige komplexe [Anionen]
30:Labuntsovit-Gruppe

Lapis Classification

VIII/E.07-034

VIII: SILIKATE
E: Ringsilikate
7: Viererringe [Si4O12] 8-; Labuntsovit-Gruppe

Classification by Hölzel

9.CB.508

9: SILICATES
C: Cyclosilicates
B: ~[Si4O12]8-, ~[Si4O10]4--Rings
5: Labuntsovite-Subgroup - Monoclinic, c=~~8

Dana 8th edition

60.01.03.02

60: Cyclosilicates Cyclosilicate Four-Membered Rings
01: Cyclosilicates Cyclosilicate Four-Membered Rings as Titanosilicates

IMA status

anerkannt 2004

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Labuntsovite supergroup  ⇒ Vuoriyarvit-Gruppe

Optical Properties

Color

farblos, weiß

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

max. Birefringence

0.121
Birefringence chart\! Tsepinite-Sr title=Birefringence chart Tsepinite-Sr

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

1.649

RI value β

1.651

RI value γ / ε

1.770

Ri mean

1.690

2V angle

Biaxial (+) 20°

Orientation

Y = b

Dispersion

sehr schwach

Pleochroism

keiner

Optical Data Luminescence

Color LW-UV (365nm)

keine

MW-UV (320nm)

keine

Color SW-UV (254nm)

keine

Crystallography

Crystal System

monoklin

Class (H-M)

m

Space Group number

8

Space Group

Cm

Cell parameters a (Å)

14.490

Cell parameters b (Å)

14.23

Cell parameters c (Å)

7.881

Cell parameters a/b or c/a

1.018

Cell parameters c/b

0.554

Cell parameters α

90°

Cell parameters β

117.28

Cell parameters γ

90°

Z

4

Volume (ų)

1444.267

X-Ray Powder Diffraction

7.10(90), 6.45(50), 5.01(40), 3.230(100), 3.135(80), 2.510(80), 1.728(50), 1.570(45)
XRD chart Tsepinite-Sr

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.67 (gemessen)

2.795 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Eweslogchorr (Eveslogchorr)

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Eweslogchorr (Eveslogchorr)/Vuonnemijok-Fluss/Pegmatit

Type material

Fersman-Museum, Moskau

Collection number of type material

3169/1

Preface

Associations

Mikroklin, Albit, Natrolith, Analcim, Ägirin, Eudialyt, Leifit, Vuoriyarvit-K, Tsepinit-Ca, Kuzmenkoit-Zn, Paratsepinit-Ba, Takanelit

Name from

Benannt nach Anatoliy Iwanowitsch Tsepin (geb. 1946), Physiker des Instituts für Geologie der Erzlagerstätten, Petrographie, Mineralogie und Geochemie der Russischen Akademie der Wissenschaften (IGEM); Spezialist in der X-ray-Spektroskopie und der Elektronen-Mikrosonden-Analyse von Mineralien. In den 1970er Jahren initiierte er eine Elektron-Mikrosonden-Untersuchung der Labuntsovit-Gruppe Mineralien. Zudem für den dominierenden Sr-Anteil des Minerals.

Author (Name, Year)

Pekov & Chukanov & Zadov & Rozenberg & Rastsvetaeva, 2005

References

New Data on Minerals 40 (2005), 11

IMA group assignments

Other languages

German

Tsepinit-Sr

English

Tsepinite-Sr

Russian

Цепинит-Sr

Traditional Chinese

水矽鈮鈦鍶石

Simplified Chinese

水硅铌钛锶石

CNMNC (IMA)-Number

IMA 2004-008

CNMNC symbol

Symbol

Tsp-Sr

Locations with GPS information

IDs

GUSID (Global unique identifier short form) pNXz3XFqMkayNafsR1TUZQ
GUID (Global unique identifier) DDF3D5A4-6A71-4632-B235-A7EC4754D465
Database ID 4448