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Kurnakovite (Kurnakovit)

Pictures (5 Images total)

Kurnakovit
Views (File:
1261164654
): 1152
Kurnakovit
Größe: 60x40x40 mm; Fundort: Inder See, Atyrau, Atyrau oblysy, Kasachstan
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Kasachstan/Atyrau oblysy/Atyrau (Gur'yev)/Inder B-Lagerstätte und Salzdom
Mineral: Kurnakovite
Image: 1261164654
Rating: 4 (votes: 1)
License: Usage for Mineralienatlas project only
Kurnakovit

Größe: 60x40x40 mm; Fundort: Inder See, Atyrau, Atyrau oblysy, Kasachstan

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-12-18
Locality: Inder B-Lagerstätte und Salzdom / Atyrau (Gur'yev) / Atyrau oblysy / Kasachstan
Schneeweißer Kurnakovit, z.T. in Ulexit
Views (File:
1110613318
): 1157
Schneeweißer Kurnakovit, z.T. in Ulexit
Größe: 2,8 x 2,5 cm; Fundort: Inder See, Atyrau, Atyrau oblysy, Kasachstan
Copyright: McSchuerf; Contribution: Mineralienatlas
Location: Kasachstan/Atyrau oblysy/Atyrau (Gur'yev)/Inder B-Lagerstätte und Salzdom
Mineral: Kurnakovite
Image: 1110613318
License: Usage for Mineralienatlas project only
Schneeweißer Kurnakovit, z.T. in Ulexit

Größe: 2,8 x 2,5 cm; Fundort: Inder See, Atyrau, Atyrau oblysy, Kasachstan

Copyright: McSchuerf
Contribution: Mineralienatlas 2005-03-12
Locality: Inder B-Lagerstätte und Salzdom / Atyrau (Gur'yev) / Atyrau oblysy / Kasachstan
Kurnakovit
Views (File:
1312062086
): 840
Kurnakovit
Kurnakovitkristalle mit rundlichem Ulexit; Größe: 73x56 mm; Fundort: U. S. Borax Open Pit, U.S. Borax Mine, Boron, Kramer District, Kern Co., Kalifornien, USA
Copyright: Rock Currier; Contribution: slugslayer
Collection: Rock Currier
Location: USA/Kalifornien (California)/Kern Co./Kramer District/Boron/Kramer Boratlagerstätte/U.S. Borax Mine/U.S. Borax Open Pit (Boron Pit, Rio Tinto Borax Mine)
Mineral: Kurnakovite
Image: 1312062086
License: Usage for Mineralienatlas project only
Kurnakovit

Kurnakovitkristalle mit rundlichem Ulexit; Größe: 73x56 mm; Fundort: U. S. Borax Open Pit, U.S. Borax Mine, Boron, Kramer District, Kern Co., Kalifornien, USA

Collection: Rock Currier
Copyright: Rock Currier
Contribution: slugslayer 2011-07-30
Locality: U.S. Borax Open Pit (Boron Pit, Rio Tinto Borax Mine) / U.S. Borax Mine / Kramer Boratlagerstätte / Boron / Kramer District / Kern Co. / Kalifornien (California) / USA
Kurnakovit
Views (File:
1312063821
): 693
Kurnakovit
Größe: 10,7 x 6,5 cm; Fundort: U. S. Borax Open Pit, U.S. Borax Mine, Boron, Kramer District, Kern Co., Kalifornien, USA
Copyright: Rock Currier; Contribution: slugslayer
Collection: Rock Currier
Location: USA/Kalifornien (California)/Kern Co./Kramer District/Boron/Kramer Boratlagerstätte/U.S. Borax Mine/U.S. Borax Open Pit (Boron Pit, Rio Tinto Borax Mine)
Mineral: Kurnakovite
Image: 1312063821
License: Usage for Mineralienatlas project only
Kurnakovit

Größe: 10,7 x 6,5 cm; Fundort: U. S. Borax Open Pit, U.S. Borax Mine, Boron, Kramer District, Kern Co., Kalifornien, USA

Collection: Rock Currier
Copyright: Rock Currier
Contribution: slugslayer 2011-07-31
Locality: U.S. Borax Open Pit (Boron Pit, Rio Tinto Borax Mine) / U.S. Borax Mine / Kramer Boratlagerstätte / Boron / Kramer District / Kern Co. / Kalifornien (California) / USA
Kurnakovit
Views (File:
1312064240
): 833
Kurnakovit
Größe: 38 mm; Fundort: U. S. Borax Open Pit, U.S. Borax Mine, Boron, Kramer District, Kern Co., Kalifornien, USA
Copyright: Rock Currier; Contribution: slugslayer
Collection: Vince Morgan
Location: USA/Kalifornien (California)/Kern Co./Kramer District/Boron/Kramer Boratlagerstätte/U.S. Borax Mine/U.S. Borax Open Pit (Boron Pit, Rio Tinto Borax Mine)
Mineral: Kurnakovite
Image: 1312064240
License: Usage for Mineralienatlas project only
Kurnakovit

Größe: 38 mm; Fundort: U. S. Borax Open Pit, U.S. Borax Mine, Boron, Kramer District, Kern Co., Kalifornien, USA

Collection: Vince Morgan
Copyright: Rock Currier
Contribution: slugslayer 2011-07-31
Locality: U.S. Borax Open Pit (Boron Pit, Rio Tinto Borax Mine) / U.S. Borax Mine / Kramer Boratlagerstätte / Boron / Kramer District / Kern Co. / Kalifornien (California) / USA

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 3
Solubility +++ verdünnte HCl, - H2O
Crystal System triklin, P1

Chemism

Chemical formula

Mg[B3O3(OH)5]·5H2O

Chemical composition

Magnesium, Bor, Sauerstoff, Wasserstoff

Unit weight: 279.851955 u; Number of atoms in the formula: 32

Info

Empirical formula:

Mg[B3O3(OH)5]·5H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

5.40

15

46.88

1.0079470

15.1192050

Boron

B

11.59

3

9.38

10.8117000

32.4351000

Oxygen

O

74.32

13

40.63

15.9994300

207.9925900

Magnesium

Mg

8.68

1

3.13

24.3050600

24.3050600

Analysis wt%

MgO : 14.40, B2O3 : 37.32, H2O : 48.28 (Ref: berechnet)

Strunz 9th edition incl. updates

6.CA.20

6: Borate
C: Triborate
A: Insel (Neso)-Triborate
20:Kurnakovit-Gruppe

Lapis Classification

V/H.06-010

V: NITRATE, CARBONATE UND BORATE
H: Gruppenborate
6: Planare und tetraedrische Gruppen [B3O5] 1- bis [B6O10] 2-

Classification by Hölzel

6.CA.210

6: Borates
C: Triborates
A: Nesotriborates
2: Inderite-Group - 3(P+2T)

Dana 8th edition

26.03.03.01

26: Hydrated Borates Containing Hydroxyl or Halogen
03: Hydrated Borates Containing Hydroxyl or Halogen

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefringence

0.017

Birefringence chart\! Kurnakovite title=Birefringence chart Kurnakovite

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

1.488

RI value β

1.491

RI value γ / ε

1.505

Ri mean

1.495

2V angle

Biaxial (+) 37°

Optical Data Luminescence

Color LW-UV (365nm)

 

gelblich weiß

Color SW-UV (254nm)

 

gelblich weiß

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

8.344

Cell parameters b (Å)

10.590

Cell parameters c (Å)

6.433

Cell parameters a/b or c/a

0.788

Cell parameters c/b

0.607

Cell parameters α

99.0

Cell parameters β

108.90

Cell parameters γ

105.50

Z

2

Volumne (ų)

499.485

X-Ray Powder Diffraction

7.31(90),
5.95(50),
5.00(100),
3.965(40),
3.481(70),
3.177(80),
2.866(70),
2.475(60)

XRD chart Kurnakovite

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)

3

VHN (Hardness Vickers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

1.785 (gemessen)

1.861 ( ρ calc. Mineralienatlas )

Instability

+++ verdünnte HCl, - H2O

Preface

Name from

Benannt zu Ehren von Nikolaĭ Semenovich Kurnakov (Никола́й Семёнович Курнако́в, 6. Dezember 1860, Nolinsk, Russland - 19. März 1941, Barvikha, UdSSR), Mineraloge und Chemiker. Er war einer der Gründer der Platinindustrie in der UdSSR.

Author (Name, Year)

Godlevskiy, 1940

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 379

Other languages

German

Kurnakovit

Spanish

Kurnakovita

English

Kurnakovite

French

Kurnakovite

Russian

Курнаковит

Simplified Chinese

富水硼镁石

Alternative Name

German

Kurnakowit

CNMNC symbol

Symbol

Kko

Locations with GPS information