Phosphorrosslerite Mineral Data

Phosphorrosslerite Mineral Data +

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General Phosphorrosslerite Information

Chemical Formula:

Mg(PO3OH)·7(H2O)

Composition:

Molecular Weight = 246.39 gm

Magnesium 9.86 % Mg 16.36 % MgO

Phosphorus 12.57 % P 28.80 % P₂O₅

Hydrogen 6.14 % H 54.84 % H₂O

Oxygen 71.43 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg(PO₃OH)·7(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1939

Locality:

Link to MinDat.org Location Data.

Synonym:

Phosphorroesslerite

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Phosphorrosslerite Crystallography

Axial Ratios:

a:b:c =0.457:1:0.261

Cell Dimensions:

a = 11.61, b = 25.4, c = 6.63, Z = 8; beta = 94.77° V = 1,948.38 Den(Calc)= 1.68

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/a

Physical Properties of Phosphorrosslerite

Color:

Colorless, Yellowish.

Density:

1.725

Diaphaniety:

Transparent to Translucent

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Optical Properties of Phosphorrosslerite

Gladstone-Dale:

CI meas= -0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2873,KPDmeas= 0.2798,KC= 0.2719

Optical Data:

Biaxial (-), a=1.477, b=1.485, g=1.486, bire=0.0090, 2V(Calc)=38, 2V(Meas)=38.33.

Calculated Properties of Phosphorrosslerite

Electron Density:

r_electron=1.82 gm/cc
note: r_{Phosphorrosslerite}=1.73 gm/cc.

Fermion Index

Fermion Index = 0.01021
Boson Index = 0.98979

Photoelectric:

PE_{Phosphorrosslerite}= 0.97 barns/electron
U=PE_{Phosphorrosslerite} x r_electron= 1.77 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Phosphorrosslerite is Not Radioactive

Phosphorrosslerite Classification

Dana Class:

39.1.9.2 (39)Hydrated Acid Phosphates, etc

(39.1)A+ [HXO4] · x(H2O)

(39.1.9)Dana Group

39.1.9.1 Rosslerite Mg(AsO3OH)·7(H2O) A2/a 2/m

39.1.9.2 Phosphorrosslerite Mg(PO3OH)·7(H2O) A2/a 2/m

Strunz Class:

VII/C.15-20 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions. cations of medium and small size: Be and Mn, Fe, Cu, Zn, Mg

VII/C.15 - Brassite - Rösslerite series

VII/C.15-10 Brassite Mg(AsO3OH)·4(H2O) P bca 2/m 2/m 2/m

VII/C.15-20 Phosphorrosslerite Mg(PO3OH)·7(H2O) A2/a 2/m

VII/C.15-30 Rosslerite Mg(AsO3OH)·7(H2O) A2/a 2/m

Other Phosphorrosslerite Information

References:

NAME( Athena) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Phosphorrosslerite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Print or Cut-and-Paste your Phosphorrosslerite Specimen Label here :

Phosphorrosslerite

Mg(PO3OH)·7(H2O)
Dana No: 39.1.9.2 Strunz No: VII/C.15-20
Locality:

Notes: