Nastrophite Mineral Data

Nastrophite Mineral Data +

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General Nastrophite Information

Chemical Formula:

Na(Sr,Ba)(PO4)·9(H2O)

Composition:

Molecular Weight = 380.15 gm

Barium 9.03 % Ba 10.08 % BaO

Sodium 6.05 % Na 8.15 % Na₂O

Strontium 17.29 % Sr 20.44 % SrO

Phosphorus 8.15 % P 18.67 % P₂O₅

Hydrogen 4.77 % H 42.65 % H₂O

Oxygen 54.71 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaSr_0.75Ba_0.25(PO₄)·9(H₂O)

IMA Status:

Approved IMA 1981

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 20268

PDF 25-993

Nastrophite Image

Images:

Nastrophite

Comments: Glassy to chalky crystalline nastrophite fragment.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Nastrophite Crystallography

Cell Dimensions:

a = 10.559, Z = 4; V = 1,177.25 Den(Calc)= 2.14

Crystal System:

Isometric - TetartoidalH-M Symbol (2 3) Space Group: P 2₁3

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

By Intensity(I/I_o): 2.54(1), 4.67(0.9), 5.21(0.8),

Physical Properties of Nastrophite

Cleavage:

None

Color:

Colorless.

Density:

2.05

Diaphaniety:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Nastrophite

Gladstone-Dale:

CI meas= -0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2336,KPDmeas= 0.2439,KC= 0.2372

Optical Data:

Isotropic, n=1.5.

Calculated Properties of Nastrophite

Electron Density:

r_electron=2.14 gm/cc
note: r_Nastrophite=2.14 gm/cc.

Fermion Index

Fermion Index = 0.02846
Boson Index = 0.97154

Photoelectric:

PE_Nastrophite= 54.98 barns/electron
U=PE_Nastrophite x r_electron= 117.91 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Nastrophite is Not Radioactive

Nastrophite Classification

Dana Class:

40.1.3.1 (40)Hydrated Phosphates, etc

(40.1)where A++ B++ (XO4) · x(H2O)

(40.1.3)Dana Group

40.1.3.1 Nastrophite Na(Sr,Ba)(PO4)·9(H2O) P 2₁3 2 3

40.1.3.2 Nabaphite NaBaPO4·9(H2O) P 2₁3 2 3

Strunz Class:

VII/C.28-10 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.28 - Nastrophite - Nabaphite series

VII/C.28-10 Nastrophite Na(Sr,Ba)(PO4)·9(H2O) P 2₁3 2 3

VII/C.28-20 Nabaphite NaBaPO4·9(H2O) P 2₁3 2 3

Other Nastrophite 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 Nastrophite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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

Nastrophite

Na(Sr,Ba)(PO4)·9(H2O)
Dana No: 40.1.3.1 Strunz No: VII/C.28-10
Locality:

Notes: