Reinhardbraunsite Mineral Data

Reinhardbraunsite Mineral Data +

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General Reinhardbraunsite Information

Chemical Formula:

Ca5(SiO4)2(OH,F)2

Composition:

Molecular Weight = 419.57 gm

Calcium 47.76 % Ca 66.83 % CaO

Silicon 13.39 % Si 28.64 % SiO₂

Hydrogen 0.36 % H 3.22 % H₂O

Oxygen 36.23 % O

Fluorine 2.26 % F 2.26 % F

- % F -0.95 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₅(SiO₄)₂(OH)_1.5F_0.5

IMA Status:

Approved IMA 1983

Locality:

Link to MinDat.org Location Data.

Synonym:

Calciochondrodite

ICSD 31275

PDF 37-414

Reinhardbraunsite Image

Images:

Click Here for Larger Reinhardbraunsite Image

Reinhardbraunsite Brownmillerite

Comments: Pink crystalline reinhardbraunsite in brownmillerite.
Location: Near Bellerberg, Eifel, Rheinland-Pflaz, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Reinhardbraunsite Crystallography

Axial Ratios:

a:b:c =2.268:1:1.7498

Cell Dimensions:

a = 11.458, b = 5.052, c = 8.84, Z = 2; beta = 108.91° V = 484.09 Den(Calc)= 2.88

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 1.902(1), 3.335(0.8), 2.903(0.75),

Physical Properties of Reinhardbraunsite

Cleavage:

[110] Distinct

Color:

Light pink.

Density:

2.84

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Reinhardbraunsite

Gladstone-Dale:

CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2133,KPDmeas= 0.2163,KC= 0.2119

Optical Data:

Biaxial (-), a=1.606, b=1.617, g=1.62, bire=0.0140, 2V(Calc)=54, 2V(Meas)=44-50.

Calculated Properties of Reinhardbraunsite

Electron Density:

r_electron=2.88 gm/cc
note: r_{Reinhardbraunsite}=2.88 gm/cc.

Fermion Index

Fermion Index = 0.00707
Boson Index = 0.99293

Photoelectric:

PE_{Reinhardbraunsite}= 6.37 barns/electron
U=PE_{Reinhardbraunsite} x r_electron= 18.36 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Reinhardbraunsite is Not Radioactive

Reinhardbraunsite Classification

Dana Class:

52.3.2b.3 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.3)with cations in [6] coordination only

(52.3.2b)Humite group (Chondrodite series)

52.3.2b.1 Alleghanyite Mn5(SiO4)2(OH)2 P 2₁/a 2/m

52.3.2b.2 Chondrodite (Mg,Fe)5(SiO4)2(F,OH)2 P 2₁/c 2/m

52.3.2b.3 Reinhardbraunsite Ca5(SiO4)2(OH,F)2 P 2₁/a 2/m

52.3.2b.4 Ribbeite (Mn,Mg)5(SiO4)2(OH)2 P nma 2/m 2/m 2/m

Strunz Class:

VIII/B.04-70 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6]

VIII/B.04 - Humite group

VIII/B.04-10 Norbergite Mg3(SiO4)(F,OH)2 P nma 2/m 2/m 2/m

VIII/B.04-20 Chondrodite (Mg,Fe)5(SiO4)2(F,OH)2 P 2₁/c 2/m

VIII/B.04-30 Humite (Mg,Fe)7(SiO4)3(F,OH)2 P nma 2/m 2/m 2/m

VIII/B.04-40 Clinohumite (Mg,Fe)9(SiO4)4(F,OH)2 P 2₁/c 2/m

VIII/B.04-42 Hydroxylclinohumite! Mg9(SiO4)4(OH,F)2 P 2₁/c 2/m

VIII/B.04-50 Ribbeite (Mn,Mg)5(SiO4)2(OH)2 P nma 2/m 2/m 2/m

VIII/B.04-60 Alleghanyite Mn5(SiO4)2(OH)2 P 2₁/a 2/m

VIII/B.04-70 Reinhardbraunsite Ca5(SiO4)2(OH,F)2 P 2₁/a 2/m

VIII/B.04-80 Manganhumite (Mn,Mg)7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m

VIII/B.04-90 Leucophoenicite Mn7(SiO4)3(OH)2 P 2₁/a 2/m

VIII/B.04-100 Jerrygibbsite (Mn,Zn)9(SiO4)4(OH)2 Pbn21 mm2

VIII/B.04-110 Sonolite Mn9(SiO4)4(OH,F)2 P 2₁/a 2/m

Other Reinhardbraunsite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Reinhardbraunsite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Reinhardbraunsite

Ca5(SiO4)2(OH,F)2
Dana No: 52.3.2b.3 Strunz No: VIII/B.04-70
Locality:

Notes: