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Jahnsite-(CaMnMn) (Jahnsit-(CaMnMn))

Pictures (4 Images total)

Phosphophyllite, Jahnsite-(CaMnMn), Schoonerite
Views (File:
1476881710
): 2410
Phosphophyllite, Jahnsite-(CaMnMn), Schoonerite
Two colorless phosphophyllite crystals with visible cleavage planes. Also in the picture groups of orange janhsite-(CaMnMn) and brown plates of schoonerite. All XRD and EDS analyzed. Note: Jahnsite-(CaMnMn) in this association tend to show significant Cd and Zn content, but not enough to be a new species for the Group; Shoonerite was originally identified by PXRD (mixed with phosphophyllite), then it was confirmed by EDS and assigned to the brown tabular aggregates. Though to be extremely rare at Sitio do Castelo Mine and it occur only in this particular assemblage (phosphophyllite, lun'okite, jansite-(CaMnMn) and nizamoffite); Locality: Sítio do Castelo Mine, Folgosinho, Gouveia, Guarda District, Portugal;
Copyright: Pedro Alves; Contribution: Stefan
Collection: Pedro Alves
Location: Portugal/Guarda, Distrikt/Gouveia/Folgosinho/Steinbruch Folgosinho (Sítio do Castelo Mine)
Mineral: Jahnsite-(CaMnMn), Phosphophyllite, Schoonerite
Image: 1476881710
Rating: 8 (votes: 2)
License: Usage for Mineralienatlas project only
Phosphophyllite, Jahnsite-(CaMnMn), Schoonerite

Two colorless phosphophyllite crystals with visible cleavage planes. Also in the picture groups of orange janhsite-(CaMnMn) and brown plates of schoonerite. All XRD and EDS analyzed. Note: Jahnsite...
Collection: Pedro Alves
Copyright: Pedro Alves
Contribution: Stefan 2016-10-19
Locality: Steinbruch Folgosinho (Sítio do Castelo Mine) / Folgosinho / Gouveia / Guarda, Distrikt / Portugal
Jahnsit-(CaMnMn)
Views (File:
1278093542
): 1034
Jahnsit-(CaMnMn)
Bildbreite: 4 mm, Fundort: Regada, Cubos-Mesquitela-Mangualde, Mangualde, Viseu, Portugal
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Portugal/Viseu, Distrikt/Mangualde/Cubos-Mesquitela-Mangualde/Regada
Mineral: Jahnsite-(CaMnMn)
Image: 1278093542
Rating: 3.67 (votes: 3)
License: Usage for Mineralienatlas project only
Jahnsit-(CaMnMn)

Bildbreite: 4 mm, Fundort: Regada, Cubos-Mesquitela-Mangualde, Mangualde, Viseu, Portugal
Copyright: Luigi Chiappino
Contribution: thdun5 2010-07-02
Locality: Regada / Cubos-Mesquitela-Mangualde / Mangualde / Viseu, Distrikt / Portugal
Jahnsit-(CaMnMn)
Views (File:
1622041919
): 257
Jahnsit-(CaMnMn)
Grube Cornelia, Hagendorf; Bb 2,7 mm; Ex-Sammlung Chr. Rewitzer.
Copyright: Guy Heinen; Contribution: guyhein
Collection: Guy Heinen
Location: Deutschland/Bayern/Oberpfalz, Bezirk/Neustadt an der Waldnaab, Landkreis/Waidhaus/Hagendorf/Hagendorf-Süd (Grube Cornelia)
Mineral: Jahnsite-(CaMnMn)
Image: 1622041919
License: Usage for Mineralienatlas project only
Jahnsit-(CaMnMn)

Grube Cornelia, Hagendorf; Bb 2,7 mm; Ex-Sammlung Chr. Rewitzer.
Collection: Guy Heinen
Copyright: Guy Heinen
Contribution: guyhein 2021-05-26
Locality: Hagendorf-Süd (Grube Cornelia) / Hagendorf / Waidhaus / Neustadt an der Waldnaab, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland
Jahnsit-(CaMnMn), Frondelit
Views (File:
1671097343
): 69
Jahnsit-(CaMnMn), Frondelit
Jahnsit-(CaMnMn) gelbe kugelige Aggregate. BB = 5,5 mm. Modified by CombineZP; Oberpfalz, Bezirk/Neustadt an der Waldnaab, Landkreis/Waidhaus/Silbergrube
Copyright: horst knoll; Contribution: horst knoll
Collection: Alfons Teuber
Location: Deutschland/Bayern/Oberpfalz, Bezirk/Neustadt an der Waldnaab, Landkreis/Waidhaus/Silbergrube
Mineral: Jahnsite-(CaMnMn)
Image: 1671097343
License: Usage for Mineralienatlas project only
Jahnsit-(CaMnMn), Frondelit

Jahnsit-(CaMnMn) gelbe kugelige Aggregate. BB = 5,5 mm. Modified by CombineZP; Oberpfalz, Bezirk/Neustadt an der Waldnaab, Landkreis/Waidhaus/Silbergrube
Collection: Alfons Teuber
Copyright: horst knoll
Contribution: horst knoll 2022-12-15
Locality: Silbergrube / Waidhaus / Neustadt an der Waldnaab, Landkreis / Oberpfalz, Bezirk / Bayern / Deutschland

You find additional specimen at the Geolitho Museum

Collectors Summary

Hardness (Mohs) 4
Cleavages keine wahrnehmbar
Fracture splittrig
Solubility +++ Säuren
Crystal System monoklin, Pa, P2/a

Chemism

Chemical formula

(Ca,Mn2+)Mn2+(Mn2+,Fe2+)2Fe3+2(PO4)4(OH)2·8H2O

Chemical composition

Calcium, Eisen, Mangan, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 878.774708025 u; Number of atoms in the formula: 54

Info

Empirical formula:

(Ca0.75Mn0.25)Mn(Mn0.75Fe0.25)2Fe2(PO4)4(OH)2·8H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.06

18

33.33

1.0079470

18.1430460
Oxygen

O

47.34

26

48.15

15.9994300

415.9851800
Phosphorus

P

14.10

4

7.41

30.9737612

123.8950448
Calcium

Ca

3.42

0.75

1.39

40.0784000

30.0588000
Manganese

Mn

17.19

2.75

5.09

54.9380499

151.0796372
Iron

Fe

15.89

2.5

4.63

55.8452000

139.6130000

Analysis wt%

Al2O3 : 0.70, Fe2O3 : 21.50, MgO : 0.50, CaO : 5.80, MnO : 20.20, P2O5 : 34.30, H2O : 18.50 (Ref: American Mineralogist 90)

Strunz 9th edition incl. updates

8.DH.15

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
H: Mit großen und mittelgroßen [Kationen], (OH, etc.):RO4 < 1:1
15:Whiteit-Jahnsit-Gruppe

Lapis Classification

VII/D.29-070

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
29: Mittelgroße und sehr große Kationen: Al-Mg und Ca-Na-K; Whiteit-Gruppe

Classification by Hölzel

8.DL.270

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
L: very large=2, very small-medium=2+3
2: Whiteite-Jahnsite-Group

Dana 8th edition

42.11.02.03

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
11: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (AB)4 (XO4)3 Zq · x(H2O)
02: Jahnsite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Jahnsite group  ⇒ Jahnsite subgroup

Optical Properties

max. Birefringence

0.028
Birefringence chart\! Jahnsite-(CaMnMn) title=Birefringence chart Jahnsite-(CaMnMn)

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

1.643

RI value β

1.659

RI value γ / ε

1.671

Ri mean

1.658

2V angle

Biaxial (-) 80°

Crystallography

Crystal System

monoklin

Class (H-M)

m, 2/m

Space Group number

7, 13

Space Group

Pa, P2/a

Cell parameters a (Å)

14.877

Cell parameters b (Å)

7.152

Cell parameters c (Å)

9.966

Cell parameters a/b or c/a

2.080

Cell parameters c/b

1.393

Cell parameters α

90°

Cell parameters β

109.77

Cell parameters γ

90°

Z

2

Volume (ų)

997.884

X-Ray Powder Diffraction

9.40(100),
5.74(20),
5.02(20),
4.704(30),
3.532(20),
3.463(20),
2.986(20),
2.870(80)
XRD chart Jahnsite-(CaMnMn)

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

4

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.78 (gemessen)

2.924 ( ρ calc. Mineralienatlas )

Cleavages

keine wahrnehmbar

Fracture

splittrig

Tenacity

spröde

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Portugal/Viseu, Distrikt/Mangualde/Cubos-Mesquitela-Mangualde

Preface

Name from
Richard Henry Jahns
Richard Henry Jahns
(10. März 1915 Los Angeles, Kalifornien, USA - 31. Dezember 1983 Palo Alto, Kalifornien, USA), Mineraloge und Pegmatitexperte, Stanford University, Palo Alto, Kalifornien, USA; Biografie: American Mineralogist, Volume 71, pages 652-654, 1986
Copyright: American Mineralogist; Contribution: Stefan
Image: 1546646637
License: Usage for Mineralienatlas project only

Der Wurzelname Jahnsit ehrt Richard Henry Jahns (10. März 1915 Los Angeles, Kalifornien, USA - 31. Dezember 1983 Palo Alto, Kalifornien, USA), Mineraloge und Pegmatitexperte, Stanford University, Palo Alto, Kalifornien, USA. Das Suffix kennzeichnet die Belegung von Metallatomen.

Author (Name, Year)

Grice & Dunn & Ramik, 1990

References

American Mineralogist 75 (1990), 401

IMA group assignments

 
Jahnsite group
 
 
 

 
 
Jahnsite subgroup
 
 
 

 
 
 
Jahnsite-(CaFeMg)
CaFe2+Mg2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Jahnsite-(CaMnFe)
CaMn2+Fe2+2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Jahnsite-(CaMnMg)
CaMn2+(Mg,Fe2+)2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Jahnsite-(CaMnMn)
(Ca,Mn2+)Mn2+(Mn2+,Fe2+)2Fe3+2(PO4)4(OH)2·8H2O
monoklin
Pa, P2/a

 
 
 
Jahnsite-(CaMnZn)
CaMn2+Zn2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Jahnsite-(MnMnFe)
Mn2+Mn2+Fe2+2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Jahnsite-(MnMnMg)
Mn2+Mn2+Mg2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Jahnsite-(MnMnMn)
Mn2+Mn2+Mn2+2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Jahnsite-(MnMnZn)
Mn2+Mn2+Zn2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Jahnsite-(NaFeMg)
NaFe3+Mg2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Jahnsite-(NaMnMg)
(Na,Ca)(Mn2+,Fe3+)(Mg,Fe3+)2Fe3+2(PO4)4(OH)2(H2O)8
monoklin
P2/a

 
 
 
Jahnsite-(NaMnMn)
NaMn2+(Mn2+Fe3+)Σ2Fe3+2(PO4)4(OH)2·8H2O
monoklin
P2/a

 
 
 
Keckite
CaMn(Fe3+,Mn)2Fe3+2(PO4)4(OH)3·7H2O
monoklin
P21/a

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Actuality: 17. May 2025 - 23:09:00

Other languages

German

Jahnsit-(CaMnMn)

Spanish

Jahnsita-(CaMnMn)

French

Jahnsite-(CaMnMn)

English

Jahnsite-(CaMnMn)

Russian

Джансит-(CaMnMn)

CNMNC (IMA)-Number

IMA 1987-020

IMA 1987-020a

CNMNC symbol

Symbol

Jah-CaMnMn

Locations with GPS information

IDs

GUSID (Global unique identifier short form) UEexM3FrrkO-cKyDJFtV4g
GUID (Global unique identifier) 33B14750-6B71-43AE-BE70-AC83245B55E2
Database ID 1764