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Esquireite

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Esquireit
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Esquireit
faserige, weiße Aggregate von Esquireit, Esquire #1 Claim, Rush Creek, Fresno County, California, USA; BB ~ 4 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: USA/Kalifornien (California)/Fresno Co./Rush Creek/Esquire No. 1 Claim
Mineral: Esquireite
Image: 1592656662
License: Usage for Mineralienatlas project only
Esquireit

faserige, weiße Aggregate von Esquireit, Esquire #1 Claim, Rush Creek, Fresno County, California, USA; BB 4 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-06-20
Locality: Esquire No. 1 Claim / Rush Creek / Fresno Co. / Kalifornien (California) / USA

Collectors Summary

Color farblos
Streak color weiß
Lustre Glasglanz, Perlglanz
Hardness (Mohs) 2
Cleavages vollkommen {001}; mittelmäßig {100}.
Fracture unregelmäßig
Crystal System monoklin, C2

Chemism

Chemical formula

BaSi6O13·7H2O

Chemical composition

Barium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 639.940738 u; Number of atoms in the formula: 41

Info

Empirical formula:

BaSi6O13·7H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

2.21

14

34.15

1.0079470

14.1112580

Oxygen

O

50.00

20

48.78

15.9994300

319.9886000

Silicon

Si

26.33

6

14.63

28.0855300

168.5131800

Barium

Ba

21.46

1

2.44

137.3277000

137.3277000

Strunz 9th edition incl. updates

9.DP.

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
P: Übergangsstrukturen: Ketten- und Bandsilikate - Schichtsilikat

Lapis Classification

VIII/H.38-062

VIII: SILIKATE
H: Schichtsilikate
38: Schichtsilikate mit Tetraeder-Doppelschichten und verwandte Strukturen

IMA status

von der CNMNC anerkanntes Mineral; CNMNC Newsletter No. 23, Februar 2015

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz, Perlglanz

max. Birefringence

0.015

Birefringence chart\! Esquireite title=Birefringence chart Esquireite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

α = 1.477(1)

RI value β

β = 1.481 (1)

RI value γ / ε

γ = 1.492 (berechnet)

Ri mean

1.483

2V angle

Biaxial (+) 63.8(6)° (gemessen)

Orientation

Y = b; Z ^ c ≈ 22° in stumpfen β

Dispersion

keine

Pleochroism

keiner

Crystallography

Crystal System

monoklin

Class (H-M)

2

Space Group number

5

Space Group

C2

Cell parameters a (Å)

13.601(4)

Cell parameters b (Å)

4.922(1)

Cell parameters c (Å)

15.092(5)

Cell parameters a/b or c/a

2.763

Cell parameters c/b

3.066

Cell parameters α

90°

Cell parameters β

111.58(2)º

Cell parameters γ

90°

Z

2

Volume (ų)

939.502

Crystal structure

Neuer Strukturtyp, Struktur bestimmt

X-Ray Powder Diffraction

7.02(38), 5.11(33), 4.649(66), 4.191(100), 3.339(65), 2.967(32), 2.343(33), 2.261(35)

XRD chart Esquireite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Physical Properties

Hardness (Mohs)

2

Density (g/cm³)

2.237 (berechnet) 2.18(2) (gemessen)

2.262 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}; mittelmäßig {100}.

Fracture

unregelmäßig

Tenacity

etwas flexibel aber nicht elastisch, spröde

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/Fresno Co./Rush Creek/Esquire No. 1 Claim

USA/Kalifornien (California)/Mariposa Co./Incline/Trumbull Peak

Type material

Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, USA

Collection number of type material

64540, 64541, 64542, 64543 und 64544

Preface

Name from

Der Name leitet sich von der Typlokalität dem Esquire No. 1 Claim ab.

Author (Name, Year)

Anthony R. Kampf, Robert M. Housley, Gail E. Dunning and Robert E. Walstrom

References

Kampf, A.R., Housley, R.M., Dunning, G.E. and Walstrom, R.E. (2015) Esquireite, IMA 2014-066. CNMNC Newsletter No. 23, February 2015, page 53; Mineralogical Magazine, 79, 51-58.

Kampf, A.R., Housley, R.M., Dunning, G.E., Walstrom, R.E. - Esquireite, BaSi6O13∙7H2O, a new layer silicate from the barium silicate deposits of California. Canadian Mineralogist, 53, 3-12.

Other languages

German

Esquireit

English

Esquireite

Russian

Эсквайрит

CNMNC (IMA)-Number

IMA 2014-066

CNMNC symbol

Symbol

Esq

Locations with GPS information

IDs

GUSID (Global unique identifier short form) p0SdBEWOqUCIaAkH2_OdFQ
GUID (Global unique identifier) 049D44A7-8E45-40A9-8868-0907DBF39D15
Database ID 7867