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Hemihedrite (Hemihedrit)

Pictures (2 Images total)

Hemihedrit xx
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Hemihedrit xx
Florence Mine,Pinal Co./Arizona USA; Bildbreite ca.2mm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: USA/Arizona/Pinal Co./Tortilla Mts./Florence Mine
Mineral: Hemihedrite
Image: 1390924108
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Hemihedrit xx

Florence Mine,Pinal Co./Arizona USA; Bildbreite ca.2mm
Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2014-01-28
Locality: Florence Mine / Tortilla Mts. / Pinal Co. / Arizona / USA
Hemihedrit
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1488012751
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Hemihedrit
vom Potter Cramer Claim, Wickenburg, Maricopa Co., Arizona, prismatische, orangefarbene Kristalle, in Mimetesit eingebettet; BB = 3,5 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A003385, Donator: Peter Köhlen
Location: USA/Arizona/Maricopa Co./Vulture Mts/Vulture District/Potter Cramer Claim
Mineral: Hemihedrite
Image: 1488012751
License: Usage for Mineralienatlas project only
Hemihedrit (SNr: A003385)

vom Potter Cramer Claim, Wickenburg, Maricopa Co., Arizona, prismatische, orangefarbene Kristalle, in Mimetesit eingebettet; BB = 3,5 mm
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2017-02-25
Locality: Potter Cramer Claim / Vulture District / Vulture Mts / Maricopa Co. / Arizona / USA

You find additional Hemihedrit specimen at the Geolitho Museum

Collectors Summary

Color orangebraun
Hardness (Mohs) 3
Solubility +++ HNO3, ++ HCl, + KOH, - NH4OH
Crystal System triklin, P1, P1

Chemism

Chemical formula

ZnPb10(CrO4)6(SiO4)2(OH)2

Empirical formula (analysis)

Pb10.05(Zn0.91Mg0.02)Σ0.93 (Cr5.98S0.01P0.01)Σ6.00 Si1.97O34H2.16

Chemical composition

Blei, Chrom, Silicium, Zink, Sauerstoff, Wasserstoff

Unit weight: 3055.522864232 u; Number of atoms in the formula: 55.11

Info

Empirical formula:

Pb10.05(Zn0.91Mg0.02)(Cr5.98S0.01P0.01)Si1.97O34H2.16

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.07

2.16

3.92

1.0079470

2.1771655
Oxygen

O

17.80

34

61.69

15.9994300

543.9806200
Magnesium

Mg

0.02

0.02

0.04

24.3050600

0.4861012
Silicon

Si

1.81

1.97

3.57

28.0855300

55.3284941
Phosphorus

P

0.01

0.01

0.02

30.9737612

0.3097376
Sulfur

S

0.01

0.01

0.02

32.0655000

0.3206550
Chromium

Cr

10.18

5.98

10.85

51.9961600

310.9370368
Zinc

Zn

1.95

0.91

1.65

65.4094000

59.5225540
Lead

Pb

68.15

10.05

18.24

207.2100000

2,082.4605000

Strunz 9th edition incl. updates

7.FC.15

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
F: Chromate
C: Mit PO4, AsO4, SiO4
15:Iranit-Gruppe

Lapis Classification

VIII/B.28-020

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
28: Kationen mit Koordinationszahlen zwischen [8] und [12]; Inselsilikate mit [SO4] 2--, [CrO4] 2- und [PO4] 3--Gruppen

Classification by Hölzel

7.FB.260

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
F: Chromates
B: Chromates (+Anions -Water)

Dana 8th edition

36.01.01.02

36: Compound Chromates
01: Compound Chromates with miscellaneous formulae

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Iranite group

Optical Properties

Color

orangebraun

max. Birefringence

0.545

RI value α / ω / n

2.105

RI value β

2.32

RI value γ / ε

2.65

Ri mean

2.358

2V angle

Biaxial (+) 88°

Crystallography

Crystal System

triklin

Class (H-M)

1, 1

Space Group number

1, 2

Space Group

P1, P1

Cell parameters a (Å)

9.497

Cell parameters b (Å)

11.443

Cell parameters c (Å)

10.841

Cell parameters a/b or c/a

0.830

Cell parameters c/b

0.947

Cell parameters α

120.50

Cell parameters β

92.10

Cell parameters γ

55.83

Z

1

Volumne (ų)

787.241

X-Ray Powder Diffraction

4.889(50),
3.304(100),
3.177(40),
3.166(60),
3.115(70),
2.935(50),
2.856(40),
2.784(40)
XRD chart Hemihedrite

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)

6.42 (gemessen)

6.445 ( ρ calc. Mineralienatlas )

Instability

+++ HNO3, ++ HCl, + KOH, - NH4OH

(Co-)Type locality

(Co-)Type locality

USA/Arizona/Pinal Co./Tortilla Mts./Florence Mine

Preface

Author (Name, Year)

Williams & Anthony, 1970

References

Williams S A, Anthony J W (1970) Hemihedrite, a new mineral from Arizona, American Mineralogist 55, 1088-1102

Lafuente, B.; Downs, R. T.; Origlieri, M. T.; Domanik, K. J.; Gibbs, R. B.; Rumsey, M. S. - New data on hemihedrite from Arizona - Mineralogical Magazine, Appeared or available online: 26. September 2016 [neue Formel (OH) anstelle von F]

IMA group assignments

Other languages

Spanish

Hemiedrita

German

Hemihedrit

French

Hemihedrite

English

Hemihedrite

Russian

Гемиэдрит

Alternative Name

Spanish

Hemihedrita

CNMNC (IMA)-Number

IMA 1967-011

CNMNC symbol

Symbol

Hhe

Locations with GPS information