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Phosphorrösslerite

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Raton area, Colfax Co., New Mexico, USA
© 2007, JGW

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Formula:
Mg(HPO
 
4
) · 7H
 
2
O
System:MonoclinicColour:Colorless, white, pale ...
Hardness:2½
Name:Named by Friedrich Robitsch in 1939 for its chemical relationship to rösslerite, containing PHOSPHORus.
Isostructural with:Rösslerite


The phosphate analogue of Rösslerite.

Classification of Phosphorrösslerite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/C.15-20
Nickel-Strunz 10th (pending) edition ID:8.CE.20

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
Dana 8th edition ID:39.1.9.2

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
Hey's CIM Ref.:19.3.18

19 : Phosphates
3 : Phosphates of Be and Mg
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Type Occurrence of Phosphorrösslerite

Type Locality:Stüblbau Mine, Gold mines, Schellgaden, Murwinkel, Lungau, Salzburg, Austria
Year of Discovery:1939
Geological Setting of type material:Post-mine. Found in cold (10° C), wet muck in abandoned mine workings.

Physical Properties of Phosphorrösslerite

Lustre:Vitreous, Waxy, Dull
Diaphaneity (Transparency):Translucent
Comment:Turns dull upon dehydration.
Colour:Colorless, white, pale yellow due to staining; colorless in transmitted light.
Streak:White
Hardness (Mohs):2½
Tenacity:Brittle
Cleavage:None Observed
Fracture:Conchoidal, Sub-Conchoidal
Density (measured):1.721 - 1.729 g/cm3
Density (calculated):1.717 g/cm3
Comment:1.728 (artificial material). Calculated D ranges 1.68-1.741

Crystallography of Phosphorrösslerite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P2/b {P1 1 2/b} {P2/c} {P1 2/c 1}{P2/a}
Space Group Setting:P2/c
Cell Parameters:a = 11.61Å, b = 25.40Å, c = 6.63Å
β = 94.77°
Ratio:a:b:c = 0.457 : 1 : 0.261
Unit Cell Volume:V 1,948.38 ų (Calculated from Unit Cell)
Z:8
Morphology:Crystals equi-dimentional or short prismatic [100]; also skeletal or crusted. Easily dehydrates to a pseudomorph of newberyite after phosphorrösslerite.
Comment:ZK 137:246 (1973) structure; also ICDD 19-761 (synthetic)
X-Ray Powder Diffraction:
d-spacingIntensity
4.55 (90)
4.42 (90)
4.13 (90)
3.29 (100)
2.82 (100)
2.70 (90)
2.63 (90)
1.991 (90)
Comments:ICDD 19-761 (synthetic).

Optical Data of Phosphorrösslerite

Type:Biaxial (-)
RI values: nα = 1.477 nβ = 1.485 nγ = 1.486
2V:Measured: 38° , Calculated: 38°
Birefringence:0.009
Maximum Birefringence:δ = 0.009

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v
Optical Extinction:Z ^ c = 6.5°; OAP perpendicular {010}
Pleochroism:Non-pleochroic

Chemical Properties of Phosphorrösslerite

Formula:
Mg(HPO
 
4
) · 7H
 
2
O
Essential elements:H, Mg, O, P
All elements listed in formula:H, Mg, O, P

Relationship of Phosphorrösslerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CE.05Chudobaite
(Mg,Zn)
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.05Geigerite
Mn
2+
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.10Newberyite
Mg(HPO
 
4
) · 3H
 
2
O
8.CE.15Brassite
Mg(HAsO
 
4
) · 4H
 
2
O
8.CE.20Rösslerite
Mg(HAsO
 
4
) · 7H
 
2
O
8.CE.25Metaswitzerite
Mn
 
3
(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.25Switzerite
(Mn,Fe)
 
3
(PO
 
4
)
 
2
 · 7H
 
2
O
8.CE.30Lindackerite
CuCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 8-9H
 
2
O
8.CE.30Ondrušite
CaCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
8.CE.30Veselovskýite
ZnCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
8.CE.30Pradetite
CoCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9H
 
2
O
8.CE.30Klajite
MnCu
 
4
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 9-10H
 
2
O
8.CE.35Bobierrite
Mg
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Annabergite
Ni
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Arupite
Ni
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Erythrite
Co
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Ferrisymplesite
Fe
3+
3
(AsO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.CE.40Hörnesite
Mg
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Köttigite
Zn
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Manganohörnesite
(Mn,Mg)
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Parasymplesite
Fe
2+
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Vivianite
Fe
2+
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.40Pakhomovskyite
Co
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
8.CE.45Symplesite
Fe
2+
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
8.CE.50Cattiite
Mg
 
3
(PO
 
4
)
 
2
 · 22H
 
2
O
8.CE.55Koninckite
Fe
3+
 
PO
 
4
 · 3H
 
2
O
8.CE.60Kaňkite
FeAsO
 
4
 · 3.5H
 
2
O
8.CE.65Steigerite
Al(VO
 
4
) · 3H
 
2
O
8.CE.70Metaschoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 6H
 
2
O
8.CE.70Schoderite
Al
 
2
(PO
 
4
)(VO
 
4
) · 8H
 
2
O
8.CE.75Malhmoodite
FeZr(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.75Zigrasite
MgZr(PO
 
4
)
 
2
 · 4H
 
2
O
8.CE.75Unnamed (Ca-analogue of Zigrasite)
CaZr[PO
 
4
]
 
2
 · 4H
 
2
O
8.CE.80Santabarbaraite
Fe
3+
3
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.CE.85Metaköttigite
(Zn,Fe,Fe)
 
3
(AsO
 
4
)
 
2
 · 8(H
 
2
O,OH)
8.CE.85Metavivianite
Fe
2+
3-x
Fe
3+
x
(PO
 
4
)
 
2
(OH)x · (8-x)H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
19.3.1Moraesite
Be
 
2
(PO
 
4
)(OH) · 4H
 
2
O
19.3.2Beryllonite
NaBePO
 
4
19.3.3Hurlbutite
CaBe
 
2
(PO
 
4
)
 
2
19.3.4Hydroxylherderite
CaBe(PO
 
4
)(OH,F)
19.3.5Glucine
CaBe
 
4
(PO
 
4
)
 
2
(OH)
 
4
 · 0.5H
 
2
O
19.3.6Fransoletite
Ca
 
3
Be
 
2
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
 · 4H
 
2
O
19.3.7Uralolite
Ca
 
2
Be
 
4
(PO
 
4
)
 
3
(OH)
 
3
 · 5H
 
2
O
19.3.9Pahasapaite
Li
 
8
(Ca,Li,K)
 
10.5
Be
 
24
(PO
 
4
)
 
24
 · 38H
 
2
O
19.3.10Tiptopite
K
 
2
(Na,Ca)
 
2
Li
 
3
Be
 
6
(PO
 
4
)
 
6
(OH)
 
2
 · H
 
2
O
19.3.11Gainesite
Na(Na,K)(Be,Li)Zr
 
2
(PO
 
4
)
 
4
 · 1.5-2H
 
2
O
19.3.12Roscherite
Ca
 
2
Mn
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
 · 6H
 
2
O
19.3.13Faheyite
(Mn,Mg,Na)Be
 
2
Fe
 
2
(PO
 
4
)
 
4
 · 6H
 
2
O
19.3.14Farringtonite
Mg
 
3
(PO
 
4
)
 
2
19.3.15Holtedahlite
Mg
 
2
(PO
 
4
)(OH)
19.3.16Althausite
Mg
 
2
(PO
 
4
)(OH,F)
19.3.17Newberyite
Mg(HPO
 
4
) · 3H
 
2
O
19.3.19Bobierrite
Mg
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
19.3.20Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
 · 8H
 
2
O
19.3.21Panethite
(Na,Ca)
 
2
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)
 
2
19.3.22Dittmarite
(NH
 
4
)Mg(PO
 
4
) · H
 
2
O
19.3.23Struvite
(NH
 
4
)Mg(PO
 
4
) · 6H
 
2
O
19.3.24Hannayite
(NH
 
4
)
 
2
Mg
 
3
H
 
4
(PO
 
4
)
 
4
 · 8H
 
2
O

Other Names for Phosphorrösslerite

Synonyms:
Phosphor-roesslerite
Other Languages:
German:Phosphorrösslerit

Other Information

Fluorescence in UV light:Not fluorescent
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Phosphorrösslerite

Reference List:

- +
Friedrich and Robitsch (1939) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 142.

Hägele and Machatschki (1939) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 297.

American Mineralogist (1940): 25: 313.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 713-714.

Zeitschrift für Kristallographie (1973): 137: 246.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1980): 109: 344.

Internet Links for Phosphorrösslerite

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    • Localities for Phosphorrösslerite

    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Austria
     
    • Salzburg
      • Lungau
        • Murwinkel
          • Schellgaden
            • Gold mines
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 714; Auer, C. (1995) Lapis: 20(11): 11-20.
    • Styria
      • Schladming
        • Schladminger Tauern Mts
          • Obertalbach valley
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    Laskovic, F. & Weninger, H. (1967): Phosphorrößlerit MgH(PO4).7H2O und Newberyit MgH(PO4).3H2O aus dem Revier Roßblei der Eschachbaue im Obertal bei Schladming. Archiv für Lagerstättenforschung in den Ostalpen, 5, 132-139.
    USA
     
    • New Mexico
      • Colfax Co.
    		Minerals of New Mexico 3rd ed.
    Mineral and/or Locality
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