Nastrophite Mineral Data

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)

Environment:

Pegmatitic veinlets in cancrinite and nepheline syenites.

IMA Status:

Approved IMA 1981

Locality:

Mts. Karnasurt and Alluaiv, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the sodium, NAtrium, STROntium, and PHosphorus in the composition

Name Pronunciation:

Nastrophite + Pronunciation

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 - Tetartoidal H-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

Diaphaneity:

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
Ncalc = 1.49 - 1.51

Optical Data:

Isotropic, n=1.5.

Calculated Properties of Nastrophite

Electron Density:

Bulk Density (Electron Density)=2.14 gm/cc
note: Specific Gravity of Nastrophite =2.14 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Nastrophite= 54.98 barns/electron
U=PE_Nastrophite x rElectron Density= 117.91 barns/cc.

Radioactivity:

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

Nastrophite Classification

Dana Class:

40.01.03.01 (40)Hydrated Phosphates, etc

(40.01)where A++ B++ (XO4) ï¿½ x(H2O)

(40.01.03)Dana Group

40.01.03.01 Nastrophite Na(Sr,Ba)(PO4)•9(H2O) P 2₁3 2 3

40.01.03.02 Nabaphite NaBaPO4•9(H2O) P 2₁3 2 3

Strunz Class:

08.CJ.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CJ -With only large cations

08.CJ.15 Nastrophite Na(Sr,Ba)(PO4)•9(H2O) P 2₁3 2 3

08.CJ.15 Nabaphite NaBaPO4•9(H2O) P 2₁3 2 3

Other Nastrophite 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 Nastrophite :
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
15 - WWW-MINCRYST

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

Nastrophite

Na(Sr,Ba)(PO4)•9(H2O)
Dana No: 40.01.03.01 Strunz No: 08.CJ.15
Locality:

Notes:

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