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Phosphammite (Phosphammit)

Pictures (1 Images total)

Phosphammit
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Phosphammit
Bräunliche Phosphammit-xx, ohne Maßstab, FO: Guañape Islands, Virù Province, Libertad Department, Peru. Ex Van den Broucke Sammlung (sh.: https://www.mindat.org/mesg-560223.html).
Copyright: Wikipedia-user: David Hospital; Contribution: oliverOliver
Location: Peru/La Libertad, Region/Trujillo, Provinz/Virù/Guañape Island
Mineral: Phosphammite
Image: 1702052819
License: Creative Commons - Attribution-ShareAlike 4.0 International  (CC BY-SA) V.4.0
Phosphammit

Bräunliche Phosphammit-xx, ohne Maßstab, FO: Guañape Islands, Virù Province, Libertad Department, Peru. Ex Van den Broucke Sammlung (sh.: https://www.mindat.org/mesg-560223.html).

Copyright: Wikipedia-user: David Hospital
Contribution: oliverOliver 2023-12-08
Locality: Guañape Island / Virù / Trujillo, Provinz / La Libertad, Region / Peru

Collectors Summary

Color farblos
Streak color weiß
Solubility +++ H2O
Crystal System monoklin, P21/a

Chemism

Chemical formula

(NH4)2HPO4

Chemical composition

Phosphor, Sauerstoff, Stickstoff, Wasserstoff

Unit weight: 132.0564442 u; Number of atoms in the formula: 16

Info

Empirical formula:

(NH4)2HPO4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

6.87

9

56.25

1.0079470

9.0715230

Nitrogen

N

21.21

2

12.50

14.0067200

28.0134400

Oxygen

O

48.46

4

25.00

15.9994300

63.9977200

Phosphorus

P

23.45

1

6.25

30.9737612

30.9737612

Strunz 9th edition incl. updates

8.AD.20

8: Phosphate, Arsenate, Vanadate
A: Phosphate, etc., ohne weitere Anionen, ohne H2O
D: Mit ausschließlich großen [Kationen]
20:Phosphammit-Gruppe

Lapis Classification

VII/A.12-030

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
A: Wasserfreie Phosphate [PO4] 3-, ohne fremde Anionen
12: Sehr große Kationen: Ca-Na-K, SE, Bi u.a.

Classification by Hölzel

8.AD.420

8: PHOSPHATES ARSENATES VANADATES
A: Phosphates (-anions -water)
D: Phosphates, C large

Dana 8th edition

37.01.03.01

37: Phosphate Minerals
01: Anhydrous Acid Phosphates, etc with miscellaneous formulae

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

0.022

Birefringence chart\! Phosphammite title=Birefringence chart Phosphammite

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

1.508

RI value β

1.518

RI value γ / ε

1.530

Ri mean

1.519

2V angle

Biaxial (+) 83°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell parameters a (Å)

10.72

Cell parameters b (Å)

6.68

Cell parameters c (Å)

8.03

Cell parameters a/b or c/a

1.605

Cell parameters c/b

1.202

Cell parameters α

90°

Cell parameters β

109.68

Cell parameters γ

90°

Z

4

Volume (ų)

541.437

X-Ray Powder Diffraction

5.57(70),
5.05(100),
4.94(60),
4.13(40),
3.78(50),
3.22(60),
3.14(40),
3.06(40)

XRD chart Phosphammite

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

1.33

1.62 ( ρ calc. Mineralienatlas )

Instability

+++ H2O

Preface

Author (Name, Year)

Shepard, 1870

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 456

Other languages

Spanish

Fosfamita

German

Phosphammit

French

Phosphammite

English

Phosphammite

Russian

Фосфаммит

https://catalogmineralov.ru/mineral/phosphammite.html

Alternative Name

Italian

Fosfammite

German

Phosphammonit

Phosphammonite

CNMNC symbol

Symbol

Pam

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 3A-2jOfv8UeEY4K7Zesz5Q
GUID (Global unique identifier) 8CB60FDC-EFE7-47F1-8463-82BB65EB33E5
Database ID 3035