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Mineevite-(Y) (Mineevit-(Y))

Collectors Summary

Color grün, gelblich grün, farblos
Streak color weiß
Hardness (Mohs) 4
Cleavages vollkommen {001}
Fracture treppenartig
Solubility +++ Säuren
Crystal System hexagonal, P63/m

Chemism

Chemical formula

Na25Ba(Y,Gd,Dy)2[Cl|F2|(SO4)2|(HCO3)4|(CO3)11]

Chemical composition

Barium, Chlor, Dysprosium, Gadolinium, Natrium, Yttrium, Fluor, Kohlenstoff, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 2115.3550819 u; Number of atoms in the formula: 105

Info

Empirical formula:

Na25Ba(Y0.6Gd0.3Dy0.1)2[ClF2(SO4)2(HCO3)4(CO3)11]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.19

4

3.81

1.0079470

4.0317880
Carbon

C

8.52

15

14.29

12.0107800

180.1617000
Oxygen

O

40.09

53

50.48

15.9994300

847.9697900
Fluorine

F

1.80

2

1.90

18.9984033

37.9968065
Sodium

Na

27.17

25

23.81

22.9897702

574.7442550
Sulfur

S

3.03

2

1.90

32.0655000

64.1310000
Chlorine

Cl

1.68

1

0.95

35.4532000

35.4532000
Yttrium

Y

5.04

1.2

1.14

88.9058520

106.6870224
Barium

Ba

6.49

1

0.95

137.3277000

137.3277000
Gadolinium

Gd

4.46

0.6

0.57

157.2530000

94.3518000
Dysprosium

Dy

1.54

0.2

0.19

162.5001000

32.5000200

Analysis wt%

Ø Na2O : 36.87, BaO : 7.33, Y2O3 : 5.90, Ce2O3 : 0.58, Nd2O3 : 0.50, Sm2O3 : 0.95, Gd2O3 : 2.33, Dy2O3 : 1.80, Er2O3 : 0.51, SO3 : 7.63, CO2 : 30.83, F : 1.80, Cl : 1.70, H2O : 1.65, Ln2O3 : 13.32 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 92)

Strunz 9th edition incl. updates

5.BF.25

5: Carbonate (Carbonate, Nitrate)
B: Carbonate mit weitere Anionen, ohne H2O
F: Mit [Cl], SO4, P04
25:Mineevit

Lapis Classification

V/C.07-190

V: NITRATE, CARBONATE UND BORATE
C: Wasserfreie Carbonate, mit fremden Anionen
7: Bastnäsit-Gruppe

Classification by Hölzel

5.BD.800

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
B: Carbonates (+Anions -Water)
D: Carbonates with Rare Earth Elements
8: With other complex anions

Dana 8th edition

17.01.14.01

17: Compound Carbonates
01: Compound Carbonates with miscellaneous formulae

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

grün, gelblich grün, farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.026
Birefringence chart\! Mineevite-(Y) title=Birefringence chart Mineevite-(Y)

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

1.536

RI value γ / ε

1.510

Ri mean

1.527

2V angle

Uniaxial (-)

Optical Data Luminescence

Luminescence

fluoreszierend

Color LW-UV (365nm)

  

grün

LW-UV Intensity

schwach

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

hexagonal

Class (H-M)

6/m

Space Group number

176

Space Group

P63/m

Cell parameters a (Å)

8.811

Cell parameters b (Å)

-

Cell parameters c (Å)

37.03

Cell parameters a/b or c/a

4.203

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volumne (ų)

2489.63

X-Ray Powder Diffraction

7.61(40),
4.79(40),
4.39(40),
3.32(40),
2.829(100),
2.659(50),
2.531(70),
2.270(90)
XRD chart Mineevite-(Y)

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)

4

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.85

2.822 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

treppenartig

Tenacity

spröde

Radioactivity

radioaktiv

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Alluaiv

Preface

Author (Name, Year)

Khomyakov & Polezhaeva & Yamnova & Pushcharovskiy, 1992

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 121 (1992) (6), 138

Other languages

German

Mineevit-(Y)

Spanish

Mineevita-(Y)

French

Mineevite-(Y)

English

Mineevite-(Y)

Russian

Минеевит-(Y)

CNMNC (IMA)-Number

IMA 1991-048

CNMNC symbol

Symbol

Mev-Y

Locations with GPS information