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Ishikawaite (Ishikawait)

Pictures (2 Images total)

Ishikawait
Views (File:
1605608573
): 291
Ishikawait
Ishikawait; Little Patsy Pegmatit,Colorado; BB: 5 mm
Copyright: Rockhounder; Contribution: Rockhounder
Collection: Rockhounder
Location: USA/Colorado/Jefferson Co./South Platte District/Little Patsy Pegmatite
Mineral: Ishikawaite
Image: 1605608573
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Ishikawait

Ishikawait; Little Patsy Pegmatit,Colorado; BB: 5 mm

Collection: Rockhounder
Copyright: Rockhounder
Contribution: Rockhounder 2020-11-17
Locality: Little Patsy Pegmatite / South Platte District / Jefferson Co. / Colorado / USA
Ishikiwait-Kristall epitaktisch auf Ferrocolumbit
Views (File:
1243762194
): 1485
Ishikiwait-Kristall epitaktisch auf Ferrocolumbit
Bildbreite: 30 mm; Fundort: Grube Nr. 298, Naturschutzgebiet Ilmen, Ilmen-Gebirge, Tscheljabinsk, Ural, Russland
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Russland/Ural, Föderationskreis/Tscheljabinsk, Oblast/Ilmen-Gebirge/Naturschutzgebiet Ilmen/Grube Nr. 298
Mineral: Ishikawaite
Image: 1243762194
License: Usage for Mineralienatlas project only
Ishikiwait-Kristall epitaktisch auf Ferrocolumbit

Bildbreite: 30 mm; Fundort: Grube Nr. 298, Naturschutzgebiet Ilmen, Ilmen-Gebirge, Tscheljabinsk, Ural, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-05-31
Locality: Grube Nr. 298 / Naturschutzgebiet Ilmen / Ilmen-Gebirge / Tscheljabinsk, Oblast / Ural, Föderationskreis / Russland

Collectors Summary

Color schwarz
Streak color dunkelbraun
Hardness (Mohs) 5.5
Crystal System monoklin,

Chemism

Chemical formula

(U,Fe,Y)NbO4

Chemical composition

Eisen, Niob, Yttrium, Sauerstoff, Uran

Unit weight: 325.365595 u; Number of atoms in the formula: 6

Info

Empirical formula:

(U0.6Fe0.3Y0.1)NbO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

19.67

4

66.67

15.9994300

63.9977200

Iron

Fe

5.15

0.3

5.00

55.8452000

16.7535600

Yttrium

Y

2.73

0.1

1.67

88.9058520

8.8905852

Niobium

Nb

28.55

1

16.67

92.9063820

92.9063820

Uranium

U

43.89

0.6

10.00

238.0289130

142.8173478

Strunz 9th edition incl. updates

4.DB.25

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
B: Mit mittelgroßen [Kationen]: Ketten kantenverknüpfter Oktaeder
25:Samarskit-Gruppe

Lapis Classification

IV/D.19-070

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

Classification by Hölzel

4.DH.170

4: OXIDES
D: Dioxides
H: Wolframite-Group

Dana 8th edition

08.01.04.01

08: Multiple Oxides with Nb, Ta, and Ti
01: Multiple Oxides with Nb, Ta, and Ti where A BO4

IMA status

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Columbite supergroup  ⇒ Samarskite group

Optical Properties

Color

schwarz

Streak color

dunkelbraun

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

monoklin

Cell parameters a (Å)

5.652

Cell parameters b (Å)

9.934

Cell parameters c (Å)

5.243

Cell parameters a/b or c/a

0.569

Cell parameters c/b

0.528

Cell parameters α

90°

Cell parameters β

93.95

Cell parameters γ

90°

Z

4

Volumne (ų)

293.679

X-Ray Powder Diffraction

3.73(40),
3.64(20),
3.114(100),
2.968(100),
2.826(30),
2.615(30),
2.479(30),
1.856(30)

XRD chart Ishikawaite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

6.3 (gemessen)

7.358 ( ρ calc. Mineralienatlas )

Radioactivity

ja

Preface

Name from

der Fundstelle Ishikawa

Author (Name, Year)

Kimura, 1922

Safety Instructions

Industrial chemicals are often present in powder form and therefore often contain much higher dangers than natural, crystalline substances. These hazard statements refer to the classification of industrially used chemical compounds that may also occur in this natural mineral. The hazard classification makes no claim to completeness.




Safety classes: Ionizing radiation: Radioaktiv

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 271

IMA group assignments

Other languages

German

Ishikawait

French

Ishikawaite

English

Ishikawaite

Spanish

Ishikawaíta

Russian

Ишикаваит

Alternative Name

Japanese

石川石

CNMNC symbol

Symbol

Ikw

Locations with GPS information