Hydroxylherderite Mineral Data

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.

Name Pronunciation:

Hydroxylherderite

Synonym:

Hydroxyl-herderite - Renamed Hydroxylherderite by Mineralogical Record, v39 (2008), p131

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),

Forms:

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Forms: ( 0 1 1) ( 1 1 0) ( 1 1 1) ( 0 0 1)

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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

Diaphaneity:

Transparent to Translucent

Fracture:

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

Hardness:

5-5.5 - Apatite-Knife Blade

Luminescence:

Fluorescent, Short UV=yellow-white.

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
Ncalc = 1.62

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:

Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Hydroxylherderite =2.94 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

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

Radioactivity:

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

Hydroxylherderite Classification

Dana Class:

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

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

(41.05.04)Herderite Group

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

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

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

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

Strunz Class:

08.BA.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BA -With small and medium-sized cations

08.BA.10 Bergslagite CaBe(AsO4)(OH) P 2₁/c 2/m

08.BA.10 Herderite CaBe(PO4)F P 2₁/a 2/m

08.BA.10 Hydroxylherderite CaBe(PO4)(OH) P 2₁/a 2/m

Other Hydroxylherderite Information

References:

NAME( Dana8) PHYS. PROP.(Collectors Book of Fluorescent Minerals) 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 - 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

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Ask about Hydroxylherderite here :
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Print or Cut-and-Paste your Hydroxylherderite Specimen Label here :

Hydroxylherderite

CaBe(PO4)(OH)
Dana No: 41.05.04.02 Strunz No: 08.BA.10
Locality:

Notes: