Phosphoellenbergerite Mineral Data

Phosphoellenbergerite Mineral Data +

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General Phosphoellenbergerite Information

Chemical Formula:

Mg14(PO4)6(PO3OH,CO3)2(OH)6

Composition:

Molecular Weight = 961.64 gm

Calcium 0.42 % Ca 0.58 % CaO

Magnesium 33.62 % Mg 55.74 % MgO

Iron 1.16 % Fe 1.66 % Fe₂O₃

Phosphorus 16.43 % P 37.64 % P₂O₅

Hydrogen 0.71 % H 6.37 % H₂O

Carbon 0.75 % C 2.75 % CO₂

Oxygen 46.92 % O

______ ______

100.00 % 104.74 % = TOTAL OXIDE

Empirical Formula:

Mg_13.3Fe³⁺_0.2Ca_0.1(PO₄)_4.3(PO₃OH)_0.8(CO₃)_0.6(OH)₆

Environment:

Lenses of Precambrian serpentine-magnesite rocks of the Tingelstadtjern deposit, Modum terrane, southern Norway. Found in very high-pressure assemblages

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Modum, Norway. Dora-Maira massif, near San Giocomo, Vallone di Gilba, Val Varaita, in the Western Alps, Italy, Piemonte, Italy. Link to MinDat.org Location Data.

Name Origin:

Named as the phosphate analogue of ellenbergerite.

Synonym:

ICSD 54146

IMA1994-006

PDF 51-1456

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Phosphoellenbergerite Crystallography

Axial Ratios:

a:c = 1:0.40456

Cell Dimensions:

a = 12.467, c = 5.0437, Z = 1; V = 678.90 Den(Calc)= 2.35

Crystal System:

Hexagonal - Dihexagonal PyramidalH-M Symbol (6mm) Space Group: P 6₃mc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.685(1)(201), 3.17(0.95)(211), 1.426(0.8)(522),1.555(0.8)(213), 2.221(0.8)(321), 2.702(0.8)(400), 2.381(0.7)(401),

Physical Properties of Phosphoellenbergerite

Cleavage:

None

Color:

Blue.

Density:

Diaphaniety:

Translucent to transparent

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

6.5 - Pyrite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Phosphoellenbergerite

Gladstone-Dale:

CI meas= 0.07 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.188 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2545,KPDmeas= 0.1993,KC= 0.2143

Optical Data:

Uniaxial (-), e=1.588-1.589, w=1.606-1.609, bire=0.0180-0.0200.

Calculated Properties of Phosphoellenbergerite

Electron Density:

r_electron=2.99 gm/cc
note: r_{Phosphoellenbergerite}=3.00 gm/cc.

Fermion Index

Fermion Index = 0.03417
Boson Index = 0.96583

Photoelectric:

PE_{Phosphoellenbergerite}= 1.92 barns/electron
U=PE_{Phosphoellenbergerite} x r_electron= 5.74 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Phosphoellenbergerite is Not Radioactive

Phosphoellenbergerite Classification

Dana Class:

43.4.14.1 (43)Compound Phosphates, etc.

(43.4)(Anhydrous Compound Anions With Hydroxyl or Halogen)

(43.4.14)Dana Group

43.4.14.1 Phosphoellenbergerite ! Mg14(PO4)6(PO3OH,CO3)2(OH)6 P 6₃mc 6mm

Strunz Class:

VII/B.04-25 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.04 - Althausite - Satterlyite series

VII/B.04-10 Althausite Mg2(PO4)(OH,F,O) P na2₁ mm2

VII/B.04-20 Holtedahlite Mg12(PO3OH,CO3)(PO4)5(OH,O)6 P 3₁m 3m

VII/B.04-25 Phosphoellenbergerite Mg14(PO4)6(PO3OH,CO3)2(OH)6 P 6₃mc 6mm

VII/B.04-30 Satterlyite (Fe,Mg)2(PO4)(OH) P 3₁m 3m

Other Phosphoellenbergerite Information

References:

NAME( AmMin, Vol 84, No. 7-8) PHYS. PROP.(AmMin, Vol 84, No. 7-8) OPTIC PROP.(AmMin, Vol 84, No. 7-8)

See Also:

Links to other databases for Phosphoellenbergerite :
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 Phosphoellenbergerite Specimen Label here :

Phosphoellenbergerite

Mg14(PO4)6(PO3OH,CO3)2(OH)6
Dana No: 43.4.14.1 Strunz No: VII/B.04-25
Locality:

Notes: