Panasqueiraite Mineral Data

General Panasqueiraite Information

Chemical Formula:

CaMg(PO4)(OH,F)

Composition:

Molecular Weight = 176.86 gm

Calcium 22.66 % Ca 31.71 % CaO

Magnesium 13.74 % Mg 22.79 % MgO

Phosphorus 17.51 % P 40.13 % P₂O₅

Hydrogen 0.43 % H 3.82 % H₂O

Oxygen 42.97 % O

Fluorine 2.69 % F 2.69 % F

- % F -1.13 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaMg(PO₄)(OH)_0.75F_0.25

Environment:

Rare mineral in vein selvages in a hydrothermal Snï¿½W deposit.

IMA Status:

Approved IMA 1981

Locality:

Panasqueira Sn-W deposit, Portugal. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Panasqueiraite + Pronunciation

Panasqueiraite Crystallography

Axial Ratios:

a:b:c =0.7466:1:0.7904

Cell Dimensions:

a = 6.535, b = 8.753, c = 6.919, Z = 4; beta = 112.33° V = 366.09 Den(Calc)= 3.21

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 2.626(1), 3.02(0.86), 3.2(0.67),

Physical Properties of Panasqueiraite

Cleavage:

{010} Indistinct

Color:

White, Pink.

Density:

3.27

Diaphaneity:

Transparent to Translucent

Hardness:

5 - Apatite

Luster:

Silky - Pearly

Streak:

white

Optical Properties of Panasqueiraite

Gladstone-Dale:

CI meas= 0.081 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1871,KPDmeas= 0.1837,KC= 0.1998
Ncalc = 1.64 - 1.65

Optical Data:

Biaxial (+), a=1.59, b=1.596, g=1.616, bire=0.0260, 2V(Calc)=58, 2V(Meas)=51.

Calculated Properties of Panasqueiraite

Electron Density:

Bulk Density (Electron Density)=3.19 gm/cc
note: Specific Gravity of Panasqueiraite =3.21 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Panasqueiraite}= 3.94 barns/electron
U=PE_{Panasqueiraite} x rElectron Density= 12.60 barns/cc.

Radioactivity:

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

Panasqueiraite Classification

Dana Class:

41.05.06.03 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.05)where (A B)2 (XO4) Zq

(41.05.06)Tilasite Group

41.05.06.01 Tilasite CaMg(AsO4)F C 2/c 2/m

41.05.06.02 Isokite CaMg(PO4)F C 2/c 2/m

41.05.06.03 Panasqueiraite CaMg(PO4)(OH,F) C 2/c 2/m

Strunz Class:

08.BH.10 08 - PHOSPHATES, ARSENATES, VANADATES

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

08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1

08.BH.10 Durangite NaAl(AsO4)F C 2/c 2/m

08.BH.10 Isokite CaMg(PO4)F C 2/c 2/m

08.BH.10 Lacroixite NaAl(PO4)F C 2/c 2/m

08.BH.10 Maxwellite NaFe(AsO4)F Aa,A2/a Mono

08.BH.10 Panasqueiraite CaMg(PO4)(OH,F) C 2/c 2/m

08.BH.10 Tilasite CaMg(AsO4)F C 2/c 2/m

Other Panasqueiraite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Panasqueiraite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Panasqueiraite

CaMg(PO4)(OH,F)
Dana No: 41.05.06.03 Strunz No: 08.BH.10
Locality:

Notes:

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