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Tsepinite-Ca

Pictures (1 Images total)

Tsepinit-Ca
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Tsepinit-Ca
hellgelbliche Kristalle von Tsepinit-Ca, Hackman-Tal, Yukspor, Chibiny, Kola, Russland; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Yukspor/Hackman-Tal
Mineral: Tsepinite-Ca
Image: 1581009776
License: Usage for Mineralienatlas project only
Tsepinit-Ca

hellgelbliche Kristalle von Tsepinit-Ca, Hackman-Tal, Yukspor, Chibiny, Kola, Russland; BB < 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-02-06
Locality: Hackman-Tal / Yukspor / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color farblos bis weiß, blassbraun
Streak color weiß, auch blassbraun
Lustre Glasglanz
Hardness (Mohs) 5
Cleavages keine
Fracture uneben
Crystal System monoklin, C2/m

Chemism

Chemical formula

(Ca,K,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·4H2O

Chemical composition

Calcium, Natrium, Niob, Silicium, Titan, Kalium, Sauerstoff, Wasserstoff

Unit weight: 604.31221754 u; Number of atoms in the formula: 35.5

Info

Empirical formula:

(Ca0.6K0.3Na0.1)2(Ti0.75Nb0.25)2(Si4O12)((OH)0.75O0.25)2·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.58

9.5

26.76

1.0079470

9.5754965
Oxygen

O

47.66

18

50.70

15.9994300

287.9897400
Sodium

Na

0.76

0.2

0.56

22.9897702

4.5979540
Silicon

Si

18.59

4

11.27

28.0855300

112.3421200
Potassium

K

3.88

0.6

1.69

39.0983100

23.4589860
Calcium

Ca

7.96

1.2

3.38

40.0784000

48.0940800
Titanium

Ti

11.88

1.5

4.23

47.8671000

71.8006500
Niobium

Nb

7.69

0.5

1.41

92.9063820

46.4531910

Analysis wt%

SiO2 : 41.06, Nb2O5 : 9.08, TiO2 : 21.95, CaO : 5.29, SrO : 3.01, BaO : 3.52, Na2O : 1.32, K2O : 2.23, H2O : 13.30 (Ref: Neues Jahrbuch für Mineralogie, (Monatshefte) 2003)

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.07-033

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

Classification by Hölzel

9.CB.507

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

Dana 8th edition

60.01.03b.04

60: Cyclosilicates Cyclosilicate Four-Membered Rings
01: Cyclosilicates Cyclosilicate Four-Membered Rings as Titanosilicates
03b: Labuntsovite Group (Vuoriyarvite subgroup Monoclinic [Cm])

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Labuntsovite supergroup  ⇒ Vuoriyarvit-Gruppe

Optical Properties

Color

farblos bis weiß, blassbraun

Streak color

weiß, auch blassbraun

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.114
Birefringence chart\! Tsepinite-Ca title=Birefringence chart Tsepinite-Ca

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

1.666

RI value β

1.676

RI value γ / ε

1.780

Ri mean

1.707

2V angle

Biaxial (+) 30(10)° (gemessen) 36 (berechnet)

Orientation

Y = b

Dispersion

sehr schwach; r < v

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

14.484

Cell parameters b (Å)

14.191

Cell parameters c (Å)

7.907

Cell parameters a/b or c/a

1.021

Cell parameters c/b

0.557

Cell parameters α

90°

Cell parameters β

117.27

Cell parameters γ

90°

Z

4

Volume (ų)

1444.592

X-Ray Powder Diffraction

7.02(60),
6.38(40),
6.38(40),
3.53(40),
3.16(100),
2.62(40),
2.51(80),
1.718(50)
XRD chart Tsepinite-Ca

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)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.73 (gemessen) 2.72 (berechnet)

2.778 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Yukspor/Hackman-Tal/Lovchorrite Mine

Preface

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 Ca-Anteil des Minerals.

Author (Name, Year)

Pekov & Chukanov & Ferraris & Gula & Pushcharovsky & Zadov, 2003

References

Neues Jahrbuch für Mineralogie, Monatshefte (2003), 461

IMA group assignments

 
Labuntsovite supergroup
 
 
 

 
 
Vuoriyarvit-Gruppe
 
 
 

 
 
 
Tsepinite-Ca
(Ca,K,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·4H2O
monoklin
C2/m

 
 
 
Tsepinite-K
(K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3H2O
monoklin
Cm

 
 
 
Tsepinite-Na
(Na,H3O,K,Sr,Ba,☐)2(Ti,Nb)2(Si4O12)(OH,O)2·3H2O
monoklin
Cm

 
 
 
Tsepinite-Sr
(Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2·3H2O
monoklin
Cm

 
 
 
Vuoriyarvite-K
(K,Na,☐)12Nb8(Si4O12)4O8·12-16H2O
monoklin
Cm

Refresh list

Actuality: 14. May 2025 - 08:41:20

Other languages

German

Tsepinit-Ca

Spanish

Tsepinita-Ca

English

Tsepinite-Ca

French

Tsepinite-Ca

Russian

Цепинит-Ca

Traditional Chinese

水矽鈮鈦鈣石

Simplified Chinese

水硅铌钛钙石

CNMNC (IMA)-Number

IMA 2002-020

CNMNC symbol

Symbol

Tsp-Ca

Locations with GPS information

IDs

GUSID (Global unique identifier short form) Ntm_xcpi9UeH-isK8ps3Ew
GUID (Global unique identifier) C5BFD936-62CA-47F5-87FA-2B0AF29B3713
Database ID 3923