Panasqueiraite Mineral Data

Panasqueiraite Mineral Data +

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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

IMA Status:

Approved IMA 1981

Locality:

Link to MinDat.org Location Data.

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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 - PrismaticH-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

Diaphaniety:

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

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:

r_electron=3.19 gm/cc
note: r_{Panasqueiraite}=3.21 gm/cc.

Fermion Index

Fermion Index = 0.01425
Boson Index = 0.98575

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Panasqueiraite is Not Radioactive

Panasqueiraite Classification

Dana Class:

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

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

(41.5.6)Tilasite Group

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

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

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

Strunz Class:

VII/B.25-20 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.25 - Isokite - Thadeuite series

VII/B.25-10 Isokite CaMg(PO4)F C 2/c 2/m

VII/B.25-20 Panasqueiraite CaMg(PO4)(OH,F) C 2/c 2/m

VII/B.25-30 Tilasite CaMg(AsO4)F C 2/c 2/m

VII/B.25-40 Lacroixite NaAl(PO4)F C 2/c 2/m

VII/B.25-50 Durangite NaAl(AsO4)F C 2/c 2/m

VII/B.25-55 Maxwellite NaFe(AsO4)F Aa,A2/a Mono

VII/B.25-60 Nacaphite Na(Na,Ca)2(PO4)F P1 1

VII/B.25-70 Spodiosite? Ca2(PO4)F Pbcm 2/m 2/m 2/m

VII/B.25-80 Thadeuite (Ca,Mn)(Mg,Fe,Mn)3(PO4)2(OH,F)2 C 222₁ 2 2 2

Other Panasqueiraite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Panasqueiraite

CaMg(PO4)(OH,F)
Dana No: 41.5.6.3 Strunz No: VII/B.25-20
Locality:

Notes: