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Hancockite

Pictures (3 Images total)

Klinoedrit (rosa) und Epidot-(Pb) (orange)
Views (File:
1284059378
): 2009
Klinoedrit (rosa) und Epidot-(Pb) (orange)
Größe: 44x28 mm; Fundort: Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
Copyright: Rock Currier; Contribution: slugslayer
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Franklin
Mineral: Clinohedrite, Hancockite
Image: 1284059378
License: Usage for Mineralienatlas project only
Klinoedrit (rosa) und Epidot-(Pb) (orange)

Größe: 44x28 mm; Fundort: Franklin, Franklin Mining District, Sussex Co., New Jersey, USA

Copyright: Rock Currier
Contribution: slugslayer 2010-09-09
Locality: Franklin / Franklin Mining District / Sussex Co. / New Jersey / USA
Hancockit
Views (File:
1360945734
): 1002
Hancockit
Franklin Furnace,Sussex Co./New Jersey USA; Größe 4 x 3cm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Franklin/Franklin Marble/Furnace Quarry
Mineral: Hancockite
Image: 1360945734
License: Usage for Mineralienatlas project only
Hancockit

Franklin Furnace,Sussex Co./New Jersey USA; Größe 4 x 3cm

Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2013-02-15
Locality: Furnace Quarry / Franklin Marble / Franklin / Franklin Mining District / Sussex Co. / New Jersey / USA
prismatisch-blockige braunrote Hancockit-Kristalle
Views (File:
1507128228
): 459
prismatisch-blockige braunrote Hancockit-Kristalle
von Franklin im Sussex Co., New Jersey, USA; BB = 2,0 mm
Copyright: Bebo; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A004001, Donator: Manfred Seitz
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Franklin
Mineral: Hancockite
Image: 1507128228
License: Usage for Mineralienatlas project only
prismatisch-blockige braunrote Hancockit-Kristalle (SNr: A004001)

von Franklin im Sussex Co., New Jersey, USA; BB = 2,0 mm

Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2017-10-04
Locality: Franklin / Franklin Mining District / Sussex Co. / New Jersey / USA

Collectors Summary

Color braun, backsteinrot, bräunlich rot, kastanienbraun
Streak color bräunlich weiß
Hardness (Mohs) 6.5
Solubility - HCl
Crystal System monoklin, P21/m

Chemism

Chemical formula

CaPb(Al2Fe3+)[Si2O7][SiO4]O(OH)

Chemical composition

Aluminium, Blei, Calcium, Eisen, Silicium, Sauerstoff, Wasserstoff

Unit weight: 650.3538034 u; Number of atoms in the formula: 22

Info

Empirical formula:

CaPb(Al2Fe)[Si2O7][SiO4]O(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.15

1

4.55

1.0079470

1.0079470

Oxygen

O

31.98

13

59.09

15.9994300

207.9925900

Aluminium

Al

8.30

2

9.09

26.9815382

53.9630764

Silicon

Si

12.96

3

13.64

28.0855300

84.2565900

Calcium

Ca

6.16

1

4.55

40.0784000

40.0784000

Iron

Fe

8.59

1

4.55

55.8452000

55.8452000

Lead

Pb

31.86

1

4.55

207.2100000

207.2100000

Analysis wt%

SiO2 : 30.99, Al2O3 : 17.89, Mn2O3 : 1.38, Fe2O3 : 12.33, MnO : 2.12, MgO : 0.52, PbO : 18.53, CaO : 11.50, SrO : 3.89, H2O : 1.62 (Ref: USGS 35)

Strunz 9th edition incl. updates

9.BG.05

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
G: Gruppen(Soro)-Silikate mit gemischten SiO4 und Si2O7 Gruppen; Kationen in oktahedraler [6] und größerer Koordination
05:Epidot-Gruppe

Lapis Classification

VIII/C.23-025

VIII: SILIKATE
C: Gruppensilikate
23: Mischstrukturen mit [SiO4] 4--Inseln und [Si2O7] 6--Gruppen; Epidot-Gruppe

Classification by Hölzel

9.BN.115

9: SILICATES
B: Sorosilicates
N: With SiO4 + Si2O7
1: Clinozoisite-Group

IMA status

anerkannt, von einer IMA Subkomission umbenant von Hancockit auf Epidot-(Pb)

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Epidote supergroup  ⇒ Epidote group

Optical Properties

Color

braun, backsteinrot, bräunlich rot, kastanienbraun

Streak color

bräunlich weiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.042

Birefringence chart\! Hancockite title=Birefringence chart Hancockite

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

1.788

RI value β

1.81

RI value γ / ε

1.830

Ri mean

1.809

2V angle

Biaxial (-) 50°

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

9.03

Cell parameters b (Å)

5.62

Cell parameters c (Å)

10.29

Cell parameters a/b or c/a

1.607

Cell parameters c/b

1.831

Cell parameters α

90°

Cell parameters β

115.93

Cell parameters γ

90°

Z

2

Volumne (ų)

469.632

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6.5

VHN (Hardness Vickers)

960 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.327 (berechnet) 4 (gemessen)

4.599 ( ρ calc. Mineralienatlas )

Instability

- HCl

References

Nomenclature of epidotes A proposal concerning nomeclature within the epidote supergroup is accepted, and the names hancockite, niigataite and tweddillite are reinstated instead of epidote-(Pb), clinozoisite-(Sr)and manganipiemontite-(Sr), respectively. CNMNC Newsletter No. 26, August 2015, page 947; Mineralogical Magazine, 79, 941 - 947.

IMA group assignments

Other languages

Spanish

Epidota-(Pb)

German

Hancockit

English

Hancockite

French

Hancockite

Russian

Ханкокит

Russian

Эпидот-(Pb)

Simplified Chinese

锶帘石

old name

German

Epidot-(Pb)

English

Epidote-(Pb)

Alternative Name

Spanish

Hancockita

Hancockite

CNMNC symbol

Symbol

Hnc

Locations with GPS information