Phosphorrösslerite
This page is currently not sponsored. Click here to sponsor this page.
About Phosphorrösslerite
Formula:
Mg(HPO4) · 7H2O
Colour:
Colorless, white, pale yellow due to staining; colorless in transmitted light.
Lustre:
Vitreous, Waxy, Dull
Hardness:
2½
Specific Gravity:
1.721 - 1.729
Crystal System:
Monoclinic
Name:
Named by Friedrich Robitsch in 1939 for its chemical relationship to rösslerite, containing PHOSPHORus.
Isostructural with:
Classification of Phosphorrösslerite
Approved, 'Grandfathered' (first described prior to 1959)
7/C.15-20
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
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
39.1.9.2
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
19.3.18
19 : Phosphates
3 : Phosphates of Be and Mg
19 : Phosphates
3 : Phosphates of Be and Mg
Physical Properties of Phosphorrösslerite
Vitreous, Waxy, Dull
Transparency:
Translucent
Comment:
Turns dull upon dehydration.
Colour:
Colorless, white, pale yellow due to staining; colorless in transmitted light.
Streak:
White
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal, Sub-Conchoidal
Density:
1.721 - 1.729 g/cm3 (Measured) 1.717 g/cm3 (Calculated)
Comment:
1.728 (artificial material). Calculated D ranges 1.68-1.741
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
Max Birefringence:
δ = 0.009

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
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(HPO4) · 7H2O
IMA Formula:
Mg(PO3OH) · 7H2O
Elements listed:
Crystallography of Phosphorrösslerite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/b
Setting:
P2/c
Cell Parameters:
a = 11.61 Å, b = 25.40 Å, c = 6.63 Å
β = 94.77°
β = 94.77°
Ratio:
a:b:c = 0.457 : 1 : 0.261
Unit Cell 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
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
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).
Type Occurrence of Phosphorrösslerite
Geological Setting of Type Material:
Post-mine. Found in cold (10° C), wet muck in abandoned mine workings.
Synonyms of Phosphorrösslerite
Other Language Names for Phosphorrösslerite
German:Phosphorrösslerit
Related Minerals - Nickel-Strunz Grouping
8.CE.X | Babánekite | Cu3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.05 | Chudobaite | (Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O | Tric. |
8.CE.05 | Geigerite | Mn2+5(AsO4)2(HAsO4)2 · 10H2O | Tric. |
8.CE.10 | Newberyite | Mg(HPO4) · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
8.CE.15 | Brassite | Mg(HAsO4) · 4H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
8.CE.20 | Rößlerite | Mg(HAsO4) · 7H2O | Mon. 2/m : B2/b |
8.CE.25 | Metaswitzerite | Mn2+3(PO4)2 · 4H2O | Mon. 2/m : P2/b |
8.CE.25 | Switzerite | (Mn,Fe)3(PO4)2 · 7H2O | Mon. |
8.CE.30 | Lindackerite | CuCu4(AsO4)2(HAsO4)2 · 9H2O | Tric. 1 : P1 |
8.CE.30 | Ondrušite | CaCu4(AsO4)2(HAsO4)2 · 10H2O | Tric. 1 : P1 |
8.CE.30 | Veselovskýite | ZnCu4(AsO4)2(HAsO4)2 · 9H2O | Tric. 1 : P1 |
8.CE.30 | Pradetite | CoCu4(AsO4)2(HAsO4)2 · 9H2O | Tric. 1 : P1 |
8.CE.30 | Klajite | MnCu4(AsO4)2(HAsO4)2 · 9-10H2O | Tric. 1 : P1 |
8.CE.35 | Bobierrite | Mg3(PO4)2 · 8H2O | Mon. 2/m : B2/b |
8.CE.40 | Annabergite | Ni3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.40 | Arupite | Ni3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.40 | Barićite | (Mg,Fe)3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.40 | Erythrite | Co3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.40 | Ferrisymplesite | Fe3+3(AsO4)2(OH)3 · 5H2O | |
8.CE.40 | Hörnesite | Mg3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.40 | Köttigite | Zn3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.40 | Manganohörnesite | (Mn,Mg)3(AsO4)2 · 8H2O | Mon. 2/m : P2/m |
8.CE.40 | Parasymplesite | Fe2+3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.40 | Vivianite | Fe2+3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.40 | Pakhomovskyite | Co3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
8.CE.45 | Symplesite | Fe2+3(AsO4)2 · 8H2O | Tric. 1 : P1 |
8.CE.50 | Cattiite | Mg3(PO4)2 · 22H2O | Tric. 1 : P1 |
8.CE.55 | Koninckite | Fe3+PO4 · 3H2O | Tet. |
8.CE.60 | Kaňkite | FeAsO4 · 3.5H2O | Mon. |
8.CE.65 | Steigerite | Al(VO4) · 3H2O | Mon. 2/m : P21/m |
8.CE.70 | Metaschoderite | Al2(PO4)(VO4) · 6H2O | Mon. 2/m : P2/m |
8.CE.70 | Schoderite | Al2(PO4)(VO4) · 8H2O | Mon. |
8.CE.75 | Malhmoodite | FeZr(PO4)2 · 4H2O | Mon. |
8.CE.75 | Zigrasite | MgZr(PO4)2 · 4H2O | Tric. 1 : P1 |
8.CE.75 | Unnamed (Ca-analogue of Zigrasite) | CaZr[PO4]2 · 4H2O | Tric. |
8.CE.80 | Santabarbaraite | Fe3+3(PO4)2(OH)3 · 5H2O | Amor. |
8.CE.85 | Metaköttigite | (Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH) | Tric. 1 : P1 |
Related Minerals - Dana Grouping (8th Ed.)
39.1.9.1 | Rößlerite | Mg(HAsO4) · 7H2O | Mon. 2/m : B2/b |
Related Minerals - Hey's Chemical Index of Minerals Grouping
19.3.1 | Moraesite | Be2(PO4)(OH) · 4H2O | Mon. |
19.3.2 | Beryllonite | NaBePO4 | Mon. 2/m : P21/b |
19.3.3 | Hurlbutite | CaBe2(PO4)2 | Mon. |
19.3.4 | Hydroxylherderite | CaBe(PO4)(OH,F) | Mon. 2/m : P21/b |
19.3.5 | Glucine | CaBe4(PO4)2(OH)4 · 0.5H2O | |
19.3.6 | Fransoletite | Ca3Be2(PO4)2(HPO4)2 · 4H2O | Mon. |
19.3.7 | Uralolite | Ca2Be4(PO4)3(OH)3 · 5H2O | Mon. |
19.3.9 | Pahasapaite | Li8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O | Iso. 2 3 : I2 3 |
19.3.10 | Tiptopite | K2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2O | Hex. |
19.3.11 | Gainesite | Na(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2O | Tet. 4mm : I41md |
19.3.12 | Roscherite | Ca2Mn2+5Be4(PO4)6(OH)4 · 6H2O | Mon. 2/m : B2/m |
19.3.13 | Faheyite | Be2Mn2+Fe3+2(PO4)4 · 6H2O | Trig. 3 2 : P31 2 1 |
19.3.14 | Farringtonite | Mg3(PO4)2 | Mon. 2/m |
19.3.15 | Holtedahlite | Mg2(PO4)(OH) | Trig. 3m : P3 1m |
19.3.16 | Althausite | Mg4(PO4)2(OH,O)(F,☐) | Orth. mmm (2/m 2/m 2/m) : Pnma |
19.3.17 | Newberyite | Mg(HPO4) · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
19.3.19 | Bobierrite | Mg3(PO4)2 · 8H2O | Mon. 2/m : B2/b |
19.3.20 | Barićite | (Mg,Fe)3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
19.3.21 | Panethite | (Na,Ca)2(Mg,Fe2+)2(PO4)2 | Mon. 2/m : P21/b |
19.3.22 | Dittmarite | (NH4)Mg(PO4) · H2O | Orth. |
19.3.23 | Struvite | (NH4)Mg(PO4) · 6H2O | Orth. mm2 |
19.3.24 | Hannayite | (NH4)2Mg3H4(PO4)4 · 8H2O | Tric. 1 : P1 |
Fluorescence of Phosphorrösslerite
Not fluorescent
Other Information
Health Risks:
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:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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
mindat.org URL:
https://www.mindat.org/min-3183.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Phosphorrösslerite
Locality List




All localities listed without proper references should be considered as questionable.
Austria (TL) | |
| 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. |
| 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 | |
| Minerals of New Mexico 3rd ed. |
Raton, Colfax Co., New Mexico, USA