Phosphoellenbergerite Mineral Data

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.

Name Pronunciation:

Phosphoellenbergerite + Pronunciation

Synonym:

ICSD 54146

IMA1994-006

PDF 51-1456

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 Pyramidal H-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:

Diaphaneity:

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
Ncalc = 1.5 - 1.64

Optical Data:

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

Calculated Properties of Phosphoellenbergerite

Electron Density:

Bulk Density (Electron Density)=2.99 gm/cc
note: Specific Gravity of Phosphoellenbergerite =3.00 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Phosphoellenbergerite is Not Radioactive

Phosphoellenbergerite Classification

Dana Class:

43.04.14.01 (43)Compound Phosphates, etc.

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

(43.04.14)Dana Group

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

Strunz Class:

08.BB.55 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BB -With only medium-sized cations, (OH, etc.):RO4 ï¿½ 1:1

08.BB.55 Phosphoellenbergerite! Mg14(PO4)6(PO3OH,CO3)2(OH)6 P 6₃mc 6mm

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 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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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: 43.04.14.01 Strunz No: 08.BB.55
Locality:

Notes:

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