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Kurnakovite

Pictures (5 Images total)

Kurnakovit
Views (File:
1261164654
): 1145
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
): 1153
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
): 837
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
): 687
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
): 828
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

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Kurnakovit
Google-Bilder-Suche - search for: Kurnakovit
Mineralienatlas.de (Forum) - search for: Kurnakovit

English pages

Mindat - search for: Kurnakovite
Webmineral - search for:Kurnakovite
Handbook-of-Mineralogy - search for: Kurnakovite
RRUFF - Raman, XRD and other mineral data - search for: Kurnakovite
RRUFF - References and PDF downloads - search for: Kurnakovite
American-Mineralogist-Crystal-Structure-Database - search for: Kurnakovite
Strahlen.org - search for: Kurnakovite

Russian pages

Webmineral.ru - search for: Курнаковит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Kurnakovit
Crystal-Treasure.com - search for: Kurnakovit
Bosse - search for: Kurnakovit
Edelsteine Neuburg - Gundolf Fischer - search for: Kurnakovit
Geolitho marketplace, by and for collectors - search for: Kurnakovit

Locations with GPS information