Hydroxylherderite Mineral Data

Hydroxylherderite Mineral Data +

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General Hydroxylherderite Information

Chemical Formula:

CaBe(PO4)(OH)

Composition:

Molecular Weight = 161.07 gm

Calcium 24.88 % Ca 34.82 % CaO

Beryllium 5.60 % Be 15.53 % BeO

Phosphorus 19.23 % P 44.06 % P₂O₅

Hydrogen 0.63 % H 5.59 % H₂O

Oxygen 49.67 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaBe(PO₄)(OH)

Environment:

Pegmatitic rocks.

IMA Status:

Valid Species (Pre-IMA) 1894

Locality:

Paris, Maine, USA. Link to MinDat.org Location Data.

Name Origin:

Named for the composition and relationship to herderite.

Synonym:

ICSD 67601

PDF 34-147

Hydroxylherderite Image

Images:

Hydroxylherderite

Comments: Transparent crystals of hydroxylherderite.
Location: Lord Hill quarry, Stonehame, Oxford County, Maine, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Hydroxylherderite Crystallography

Axial Ratios:

a:b:c =1.2777:1:0.6295

Cell Dimensions:

a = 9.802, b = 7.671, c = 4.829, Z = 4; beta = 90.01° V = 363.10 Den(Calc)= 2.95

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): 3.135(1), 2.868(0.45), 3.433(0.35),

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Crystal Structure:

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Lager G A , Gibbs G V , American Mineralogist , 59 (1974) p.919-925, A refinement of the crystal structure of herderite, CaBePO4OH

Physical Properties of Hydroxylherderite

Cleavage:

[110] Indistinct

Color:

Blue, Blue green, Colorless, Greenish white, White.

Density:

2.94

Diaphaniety:

Transparent to Translucent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Hardness:

5-5.5 - Apatite-Knife Blade

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Hydroxylherderite

Gladstone-Dale:

CI meas= -0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2095,KPDmeas= 0.2102,KC= 0.21

Optical Data:

Biaxial (-), a=1.601, b=1.622, g=1.631, bire=0.0300, 2V(Calc)=64, 2V(Meas)=70.

Calculated Properties of Hydroxylherderite

Electron Density:

r_electron=2.92 gm/cc
note: r_{Hydroxylherderite}=2.94 gm/cc.

Fermion Index

Fermion Index = 0.05652
Boson Index = 0.94348

Photoelectric:

PE_{Hydroxylherderite}= 4.05 barns/electron
U=PE_{Hydroxylherderite} x r_electron= 11.81 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hydroxylherderite is Not Radioactive

Hydroxylherderite Classification

Dana Class:

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

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

(41.5.4)Dana Group

41.5.4.1 Herderite CaBe(PO4)F P 2₁/a 2/m

41.5.4.2 Hydroxylherderite CaBe(PO4)(OH) P 2₁/a 2/m

41.5.4.3 Vayrynenite MnBe(PO4)(OH,F) P 2₁/a 2/m

41.5.4.4 Bergslagite CaBe(AsO4)(OH) P 2₁/c 2/m

Strunz Class:

VII/B.01-20 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of very small size: Li, Be

VII/B.01 - Herderite - Babefphite series

VII/B.01-10 Herderite CaBe(PO4)F P 2₁/a 2/m

VII/B.01-20 Hydroxylherderite CaBe(PO4)(OH) P 2₁/a 2/m

VII/B.01-30 Bergslagite CaBe(AsO4)(OH) P 2₁/c 2/m

VII/B.01-50 Vayrynenite MnBe(PO4)(OH,F) P 2₁/a 2/m

VII/B.01-60 Babefphite BaBe(PO4)(F,O) I 4₁/amd 4/m 2/m 2/m

Other Hydroxylherderite 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 Hydroxylherderite :
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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Hydroxylherderite

CaBe(PO4)(OH)
Dana No: 41.5.4.2 Strunz No: VII/B.01-20
Locality:

Notes: