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Portlandite (Portlandit)

Pictures (11 Images total)

Portlandit
Views (File:
1249805527
): 4166
Portlandit
Bildbreite: 8 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried; Contribution: slugslayer
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Mayen/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Portlandite
Image: 1249805527
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Portlandit

Bildbreite: 8 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried
Contribution: slugslayer 2009-08-09
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Portlandit
Views (File:
1254603495
): 3383
Portlandit
Bildbreite: 2 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Mayen/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Portlandite
Image: 1254603495
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Portlandit

Bildbreite: 2 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Deutschland
Copyright: Stephan Wolfsried
Contribution: Hg 2009-10-03
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Portlandit
Views (File:
1174919576
): 4420, Rating: 7.75
Portlandit
Bildbreite: 8 mm; Fundort Stbr. Caspar, Ettringer Bellerberg, Ettringen, Mayen, Eifel
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Mayen/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Portlandite
Image: 1174919576
Rating: 7.75 (votes: 4)
License: Usage for Mineralienatlas project only
Portlandit

Bildbreite: 8 mm; Fundort Stbr. Caspar, Ettringer Bellerberg, Ettringen, Mayen, Eifel
Copyright: Stephan Wolfsried
Contribution: Hg 2007-03-26
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Portlandit
Views (File:
1416946005
): 2447
Portlandit
Tafelige weiße Kristalle mit Ettringit, BB = 5,2 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Rheinland-Pfalz, Deutschland.
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A004306, Donator: Dorothea Kulicke
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Mayen/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Portlandite
Image: 1416946005
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Portlandit (SNr: A004306)

Tafelige weiße Kristalle mit Ettringit, BB = 5,2 mm; Fundort: Stbr. Caspar, Ettringer Bellerberg, Ettringen, Eifel, Rheinland-Pfalz, Deutschland.
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2014-11-25
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Portlandit
Views (File:
1163267338
): 3070
Portlandit
Bildbreite: 4 mm; Fundort Bellerberg, Ettringen, Eifel
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Mayen/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Portlandite
Image: 1163267338
Rating: 6 (votes: 2)
License: Usage for Mineralienatlas project only
Portlandit

Bildbreite: 4 mm; Fundort Bellerberg, Ettringen, Eifel
Copyright: Stephan Wolfsried
Contribution: Hg 2006-11-11
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Portlandit
Views (File:
1286460214
): 1371
Portlandit
Bildbreite: 2 mm, Fundort: Carpenara, Val Varenna, Genova, Ligurien, Italien
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Italien/Ligurien (Liguria), Region/Genua (Genova), Metropolitanstadt/Val Varenna/Carpenara/Carpenara Schlacken-Lokalität
Mineral: Portlandite
Image: 1286460214
Rating: 5.5 (votes: 2)
License: Usage for Mineralienatlas project only
Portlandit

Bildbreite: 2 mm, Fundort: Carpenara, Val Varenna, Genova, Ligurien, Italien
Copyright: Luigi Chiappino
Contribution: thdun5 2010-10-07
Locality: Carpenara Schlacken-Lokalität / Carpenara / Val Varenna / Genua (Genova), Metropolitanstadt / Ligurien (Liguria), Region / Italien

You find additional Portlandit specimen at the Geolitho Museum

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 2
Solubility +++ H2O, Säuren
Crystal System trigonal, P3m1

Chemism

Chemical formula

Ca(OH)2

Chemical composition

Calcium, Sauerstoff, Wasserstoff

Unit weight: 74.093154 u; Number of atoms in the formula: 5

Info

Empirical formula:

Ca(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.72

2

40.00

1.0079470

2.0158940
Oxygen

O

43.19

2

40.00

15.9994300

31.9988600
Calcium

Ca

54.09

1

20.00

40.0784000

40.0784000

Analysis wt%

CaO : 75.64, H2O : 34.31 (Ref: berechnet)

Strunz 9th edition incl. updates

4.FE.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
F: Hydroxide (ohne V oder U)
E: Hydroxide mit OH, ohne H2O; Lagen kantenverknüpfter Oktaeder
05:Brucit-Gruppe

Lapis Classification

IV/F.03-100

IV: OXIDE
F: Hydroxide und oxidische Hydrate (wasserhaltige Oxide mit Schichtstruktur)
3: Brucit-Reihe

Classification by Hölzel

4.FA.170

4: OXIDES
F: Hydroxides and Hydrates (without V and U)
A: Dihydroxides Me(OH)2
1: Brucite-Group

Dana 8th edition

06.02.01.04

06: Hydroxides and Oxides Containing Hydroxyl
02: Hydroxides and Oxides Containing Hydroxyl where X++ (OH)2
01: Brucite group (Rhombohedral: P-3m1)

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.027
Birefringence chart\! Portlandite title=Birefringence chart Portlandite

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

1.574

RI value γ / ε

1.547

Ri mean

1.565

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

164

Space Group

P3m1

Cell parameters a (Å)

3.593

Cell parameters b (Å)

-

Cell parameters c (Å)

4.909

Cell parameters a/b or c/a

1.366

Cell parameters c/b

-

Z

1

Volumne (ų)

54.883

X-Ray Powder Diffraction

4.9(70),
3.112(20),
2.628(100),
1.927(40),
1.796(40),
1.687(20),
1.484(10),
1.449(10)
XRD chart Portlandite

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)

2

VHN (Hardness Vickers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.23

2.242 ( ρ calc. Mineralienatlas )

Instability

+++ H2O, Säuren

(Co-)Type locality

(Co-)Type locality

UK/Nordirland/Antrim Co./Larne/Scawt Hill

Preface

Author (Name, Year)

Tilley, 1933

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 447

Other languages

German

Portlandit

Spanish

Portlandita

English

Portlandite

French

Portlandite

Russian

Портландит

Simplified Chinese

氢氧钙石

Traditional Chinese

氫氧鈣石

Alternative Name

Simplified Chinese

羟钙石

Traditional Chinese

羥鈣石

CNMNC symbol

Symbol

Por

Locations with GPS information