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Kurnakovite

Pictures (6 Images total)

Kurnakovit
Views (File:
1261164654
): 1400
Kurnakovit
Größe: 60x40x40 mm; Fundort: Inder See, Atyrau, Atyrau oblysy, Kasachstan
Copyright: Pavel M. Kartashov; Contribution: Philip Blümner
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: Philip Blümner 2009-12-18
Locality: Inder B-Lagerstätte und Salzdom / Atyrau (Gur'yev) / Atyrau oblysy / Kasachstan
Schneeweißer Kurnakovit, z.T. in Ulexit
Views (File:
1110613318
): 1246
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
): 940
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: Philip Blümner
Collection: Rock Currier
Location: USA/Kalifornien (California)/Kern County/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: Philip Blümner 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 County / Kalifornien (California) / USA
Kurnakovit
Views (File:
1312063821
): 755
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: Philip Blümner
Collection: Rock Currier
Location: USA/Kalifornien (California)/Kern County/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: Philip Blümner 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 County / Kalifornien (California) / USA
Kurnakovit
Views (File:
1312064240
): 885
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: Philip Blümner
Collection: Vince Morgan
Location: USA/Kalifornien (California)/Kern County/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: Philip Blümner 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 County / Kalifornien (California) / USA

You find additional specimen at the Geolitho Museum

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

Volume (ų)

499.485

Crystal structure

Bing Zhou, Vladimir K. Michaelis, Yuanming Pan, Yefeng Yao, Kimberly T. Tait, Brendt C. Hyde, John E.C. Wren, Barbara L. Sherriff, Scott Kroeker: Crystal structure refinements of borate dimorphs inderite and kurnakovite using 11B and 25Mg nuclear magnetic resonance and DFT calculations. American Mineralogist Vol. 97, Nr. 11-12 (2012) S. 1858-1865.

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

(Co-)Type locality

(Co-)Type locality

Kasachstan/Atyrau oblysy/Atyrau (Gur'yev)/Inder B-Lagerstätte und Salzdom

Kasachstan/Atyrau oblysy/Atyrau (Gur'yev)/Inder B-Lagerstätte und Salzdom/Lagerstätte No. 33

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

IDs

GUSID (Global unique identifier short form) wlK-DeYcdkaKgk1WxYtOUw
GUID (Global unique identifier) 0DBE52C2-1CE6-4676-8A82-4D56C58B4E53
Database ID 2091